Device assembly consisting of a heat exchanger arrangement of a heat pump of a laundry dryer

Abstract

The invention relates to a device assembly consisting of heat exchangers of a heat pump of a laundry dryer arranged on a seating floor, through which the process air of the laundry dryer flows, the seating floor belonging to a floor assembly of the laundry dryer, an intermediate space being provided between the heat exchangers in the flow direction of the process air. In the intermediate space, the transition of the channel section of the process air channel consisting of two heat exchangers is laterally delimited by two connecting elements which are vertical and parallel and spaced apart. The connecting elements are connectable with the seating floor and with the upper end cap and rest on the heat exchanger contact surfaces, respectively. In order to propose a device assembly which can be manufactured with simple and mass production suitable means for sealing the process air channel in the intermediate space, the connecting elements are provided with sealing elements over the entire section of their edges running in the longitudinal direction, the flatly configured contact surfaces of the heat exchangers resting on the seating floor resting on the sealing elements.

Description

TECHNICAL FIELD

[0001] The invention relates to an arrangement of heat exchangers of a heat pump of a laundry dryer, which process air of the laundry dryer flows through, arranged on a resting base belonging to a base assembly of the laundry dryer, wherein, seen in the flow direction of the process air, an intermediate space is provided between the heat exchangers, in which the transition of the channel section of the process air channel, which is formed by the two heat exchangers, is laterally delimited by two connection elements running vertically and parallel to each other and spaced apart from each other, wherein the connection elements are connected or connectable on the one hand to the resting base and on the other hand to an upper end cap and the connection elements rest on contact faces of the heat exchangers, respectively. BACKGROUND

[0002] For receiving and processing laundry to be dried, the laundry dryer has a rotary laundry drum, which is connected to a process air system, wherein the laundry is loaded by this process air system with a relatively hot, dehumidified air flow. The moist, water vapor-rich air leaving the laundry drum, which is formed here, is fed in the heat pump dryer to an evaporator of the heat pump, in which the air is cooled and thus the contained moisture is condensed. The dried air coming out of the heat exchanger of the evaporator through the process air line is then heated by the heat exchanger of the condenser and is again conducted into the laundry drum. Here, the heat pump thus cooperates with the process air system, so that heat can be continuously recovered from the process air.

[0003] The heat pump has a refrigerant circuit, whose refrigerant is circulated through a conduit between a first heat exchanger (or condenser) and a second heat exchanger (or evaporator) via a pressure reducer and is compressed here by a compressor. The compressor also contributes to the circulation of the refrigerant. Arranged on the pressure side of the refrigerant circuit is the first heat exchanger used as a condenser, which, as already set out, is provided for heating the process air, after which the condensed refrigerant then flows into the pressure reducer. The refrigerant, which is then at low pressure, then reaches the second heat exchanger, which functions as an evaporator, in which the refrigerant absorbs heat from the process air, so that the moisture of the process air condenses.

[0004] The heat pump, which is composed of the two heat exchangers, the compressor and the pressure reducer, as well as the process air guiding device and also the condensate discharge duct are received in a common laundry dryer below the laundry drum by the base assembly. Here, the first and second heat exchangers are spaced apart from one another on the setting bed of the base assembly and arranged in an array in the flow path of the process air circuit.

[0005] Here, the setting bed and the vertical side walls coming therefrom can constitute a heat exchanger housing which laterally surrounds the heat exchangers in sections and is closed by an upper end cover. Such a conventional heat exchanger housing is mostly air-tight to the ambient air, since the housing parts of the heat exchanger housing have different construction tolerances and thus form gaps between these housing parts and the two heat exchangers.

[0006] An ingress of ambient air also occurs because the process air after flowing through the evaporator passes a so-called pressure transition point, as a result of which an underpressure occurs in the region of the liquefier. As a result of the non-sealing of the heat exchanger housing, ambient air is drawn into the heat exchanger housing on the basis thereof. Here, the problem exists that the ambient air which has entered the heat exchanger housing can mix with the process air flowing into the heat exchanger housing and / or flow past the heat exchanger as a bypass flow.

[0007] From DE 10 2018 205 734 A1 a device assembly is known which is composed of a heat exchanger of a heat pump of a laundry dryer arranged on a setting bed of a base assembly of a laundry dryer of the aforementioned generic type. Here, the base assembly has a heat pump which can be thermally coupled to a process air system of the laundry dryer, the heat pump having a heat exchanger arranged in a heat exchanger housing. The heat exchanger housing which extends on the longitudinal sides of the heat exchanger is connected with the setting bed on which the heat exchanger is placed and is closed above the heat exchanger by an end cover which is referred to as a cover. Two protrusions which run parallel to one another, are arranged spaced apart from one another and extend up to the setting bed come from the end cover, these protrusions being used as connection elements of channel sections which laterally delimit a process air channel. The protrusions which are referred to as connection elements are wedge-shaped configured and run between the heat exchangers, wherein the protrusions should at least indirectly come into contact with the heat exchangers.

[0008] Furthermore, between the end cap and the heat exchanger, a flexible, elastically deformable gasket is provided. The connecting elements have a protrusion on their end facing the seating bottom. The connecting elements are inserted with the protrusions into recesses which are configured on the seating bottom. Furthermore, each heat exchanger should have lateral contact flanges which are in contact with a respective connecting element and are configured in a springy manner.

[0009] As with the longitudinal sides of the connecting elements, the contact flanges of the heat exchangers which are in contact with them are arranged at an angle. Each heat exchanger has two lateral contact flanges which extend over the height of the respective heat exchanger on both sides of the inlet or outlet of the process air channel, which are sealed with respect to one of the wall elements of the heat exchanger housing by a sealing rib, respectively.

[0010] Furthermore, from EP 3 124 682 A1, a laundry dryer provided with a heat pump is known in which two heat exchangers respectively configured as a condenser or as an evaporator are arranged one after the other in the flow direction of the process air and are arranged on a bottom assembly of the laundry dryer below the laundry drum. Here, the two heat exchangers should be separated from each other by a gap which has an advantageously uniform width. In the process air channel, the process air first flows through that heat exchanger which functions as an evaporator, from which it comes out, flows through the gap and then enters that heat exchanger which constitutes a condenser.

[0011] Here, in the gap, an element which is referred to as a gitter or rost is inserted, which has the function of a connecting element according to the aforementioned class and is therefore described accordingly. The dimensions of the connecting element are chosen such that the entire free space between the first and second heat exchanger is filled, wherein the rectangularly running frame of the connecting element encloses the process air channel, whereby in the region of the gap a communication between the process air and the ambient air should be avoided. When the correspondingly configured connecting element is arranged between the heat exchangers, the pins coming out of the frame lower part of the connecting element are inserted into the recesses of the seating bottom of the bottom assembly and the protrusions of the vertical frame part enclose the outer flange face of the heat exchangers. SUMMARY

[0012] The task of the present invention is to realize a device assembly for sealing the process air channel for the arrangement of the heat exchangers on the seating bottom of the bottom assembly of a laundry dryer by means of simple and suitable for mass production means.

[0013] This task is solved by the features of the independent claim 1. Advantageous configurations are described in the dependent claims, which can constitute an aspect of the invention, respectively on their own or in different combinations with each other.

[0014] According to the invention, the connecting elements are provided with a sealing element over the entire section of their edge running in the longitudinal direction, against which the flatly configured contact faces of the heat exchangers resting on the resting base are placed. Since the connecting elements are provided with a sealing element, it is possible to prevent that process air undesirably mixes with ambient air or flows through the heat exchanger housing parallel to the heat exchangers, i.e. around the heat exchangers.

[0015] According to the invention, the connecting elements are provided with a sealing element over the entire section of their edge running in the longitudinal direction, against which the flatly configured contact faces of the heat exchangers resting on the resting base are placed. Since the connecting elements are provided with a sealing element, it is possible to prevent that process air undesirably mixes with ambient air or flows through the heat exchanger housing parallel to the heat exchangers, i.e. around the heat exchangers.

[0016] In contrast, according to the documents DE 10 2018 205 734 A1 and EP 3 124 682 A1, no sealing elements are provided between the connecting elements and the contact faces of the heat exchangers. In the device assembly according to DE 10 2018 205 734 A1, the connecting elements come out of the end cover and have to be introduced into recesses of the resting base when the end cover is installed. According to EP 3 124 682 A1, the connecting elements are embodied as frames with a rectangular outer contour.

[0017] As provided beyond this, the connecting elements of the invention can advantageously be extended from the resting base and be configured in one piece therewith. Here, the connecting elements should extend in their longitudinal extension ( ) are configured wedge-shaped, so that the sealing elements configured as sealing strips run at an angle to the perpendicular of the connecting elements, wherein the contact faces of the heat exchangers are configured obliquely at the same angle. The two heat exchangers can be arranged spatially separated from one another between the connecting elements projecting upward from the lying base and the guide rails. The oblique plane constitutes the contact face of the heat exchangers to the adjoining sealing strips and to the guide rails, so that, as a result of this oblique plane, the contact faces are pressed with sufficient force against the sealing faces of the sealing strips for sealing. As a result, air transfer into the ambient air is effectively avoided. Preferably, the lying base and the connecting elements are manufactured as a unit from plastic.

[0018] In a further configuration of the application, it is provided that the connecting elements have lengthwise running reinforcing ribs, in which each one end is connected to the lying base. The connecting elements are thus configured by means of lengthwise ribs which have sufficient rigidity and which are manufactured together with the lying base as a plastic injection-molded part. After mounting of the end cap, each one end of the connecting elements can be inserted in a form-locked manner into the end cap, which end is configured with a small width as a result of the wedge shape of the connecting elements.

[0019] Furthermore, the connecting elements can have a U-shaped outer contour in cross section, wherein the sealing elements are constituted by the outer legs of the connecting elements. Schenkel). The sealing elements must, however, be configured and extended to the contact faces of the heat exchangers in such a way that, after mounting of the two heat exchangers, the sealing function is ensured as a result of sufficient force being transmitted to this sealing structure.

[0020] Furthermore, the connecting elements should each have a flat base piece which delimits a process air channel, said base piece having sealing strips (Dichtleisten) which are bent away from the base piece as sealing elements, which extend in a direction away from the interior of the process air channel, which run at an obtuse angle to the base piece in a stress-free state, and which are pivotable relative to the base piece and the lying base. Here, the sealing strips extend outward from the flat base piece which delimits a channel section.

[0021] Here, the sealing strips can each be injection-molded onto the base piece by means of a connecting section which has a thinner wall relative to the wall thickness of the sealing strips. This thin-walled connecting section can be embodied as a Sicke, by means of which an elastic connection between the base piece and the respective sealing strip is established.

[0022] Furthermore, the seating base has a recess in the region facing the end side of the sealing strips, which recess can be closed by a stopper. Thereby, for a unit consisting of the seating base and the connecting element, which is manufactured from plastic by means of a spritzverfahren, it is ensured that the sealing strips can be freely swung relative to the seating base, i.e. can be brought into the desired pre-tensioned abutment on the respective contact surface of the heat exchanger.

[0023] Finally, the stopper for closing the aforementioned recess can be swung from the region of the seating base, which is outside the process air channel, into the recess by means of a film hinge. Thus, the stopper can be manufactured together with the unit consisting of the seating base and the connecting element by means of a spritzverfahren.

[0024] The application is not limited to the explained combination of the features of the independent claim 1 and the claims dependent thereon. Furthermore, further possibilities of combining individual features with one another result, especially when these individual features result from the following description of the claims, embodiments or directly from the drawings. Furthermore, the dependency of the claims on the drawings resulting from the use of reference numerals should by no means limit the scope of protection of the claims to the shown configuration examples. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to further explain the application, reference is made to the drawings, in which embodiments are shown in simplified form. The drawings show:

[0026] Figure 1 a schematic diagram showing the functional principle of a laundry dryer operated by means of a heat pump,

[0027] Figure 2 a perspective view showing a base assembly of a corresponding laundry dryer, on the seating base of which two heat exchangers are arranged, wherein between the two heat exchangers a connecting element according to the application is provided,

[0028] Figure 3 the seating base together with the connecting element coming therefrom is shown in perspective view as a single piece,

[0029] Figure 4 a perspective partial view of the seating base with the connecting element, from which the sealing elements configured as sealing strips come,

[0030] Figure 4a a Figure 4 connecting element, wherein the movement of the sealing strips upon installation of the respective heat exchanger is illustrated by the different positions thereof,

[0031] Figure 5a cross-sectional view showing the seating base in the region of a recess provided below the sealing strip, which recess is closed by a swivelable filler piece,

[0032] Figure 6 a perspective view showing the seating base in relation to a heat exchanger housing in which the two heat exchangers described above are accommodated,

[0033] Figure 6a a view of the device assembly according to Figure 6 after the heat exchangers have been inserted, and

[0034] Figure 7 a perspective view showing the heat exchanger housing receiving the two heat exchangers, which heat exchanger housing is closed by an upper end cap. DETAILED DESCRIPTION

[0035] In Figure 1 the washing laundry dryer 1 is designated by the reference numeral 1 and has a washing laundry drum 2 for receiving washing laundry to be dried. The washing laundry drum 2 is connected to a process air channel 3 of a process air system which constitutes a circuit as a whole, wherein a relatively hot, dry process air flows into the washing laundry drum 2 through a supply air section 3a of the process air channel 3 and subsequently flows out of the washing laundry drum 2 again as a moist, water vapor-rich process air (after it has absorbed moisture of the washing laundry) through a discharge air section 3b of the process air channel 3. The respective air flow inside the process air channel 3 is generated by a process air fan 4.

[0036] A heat pump 5 which cooperates with the process air system of the washing laundry dryer 1, said heat pump 5 having a first heat exchanger 6 which is configured as a condenser and a second heat exchanger 7 which is configured as an evaporator. Here, the process air which is delivered through the process air fan 4 in a cooled and dry state, in particular from the second heat exchanger 7, is heated in the first heat exchanger 6 (condenser) and subsequently reaches the washing laundry drum 2 through the supply air section 3a. In this washing laundry drum 2, the process air absorbs moisture of the washing laundry and reaches the second heat exchanger 7 (evaporator) through the discharge air section 3b, in which second heat exchanger (evaporator) the water vapor contained in the process air condenses on the cooled heat exchanger surface and is thereby condensed. The dehumidified process air in this way reaches the first heat exchanger 6 again in the circuit through the process air channel 3 and the process air fan 4.

[0037] Furthermore, the heat pump 5 has a refrigerant circuit 8 in which liquid refrigerant is conveyed through the two heat exchangers 6 and 7 mentioned above and through a pressure relief device configured as a throttle valve 10 by means of a compressor 9. Here, the refrigerant absorbs heat from the process air in the second heat exchanger 7 and transfers the heat onto the process air again through the first heat exchanger 6.

[0038] In Figure 2 A portion of the bottom assembly 11 of the laundry dryer 1 is shown, which is provided for receiving different components and runs underneath the laundry drum 2. Since the Figure 2 The illustration of the device assembly according to the application, which is constituted by the two heat exchangers 6 and 7 arranged on the bottom assembly 11, is elucidated, so that the display of the remaining components, which can obstruct the view onto the two heat exchangers 6 and 7, is dispensed with. The two heat exchangers 6 and 7 are arranged in a heat exchanger housing 12 and are seated here on a seating bottom 13 of the heat exchanger housing 12. As is elucidated by the arrows, the process air first enters into the second heat exchanger 7 (evaporator) and then reaches the first heat exchanger 6 (condenser).

[0039] Furthermore, an exhaust air section 3b and a supply air section 3a are configured on the bottom assembly 11, which have been explained previously in connection with the diagram of the process air circuit in Figure 1 The humid process air, which reaches the second heat exchanger 7 (evaporator or volatilizer) through the exhaust air section 3b, is directed to the first heat exchanger 6 after its dehumidification, which is arranged spaced apart in the flow direction with respect to the second heat exchanger 7. The intermediate space 14 constituted between the two heat exchangers 6 and 7 is sealed with respect to the ambient air here, for which it is delimited by two connecting elements 16 and 17 arranged vertically and parallel and spaced apart with respect to one another. The configuration of the process air channel 3 is therefore connected in these channel sections 15 in the two heat exchangers 6 and 7 with one another.

[0040] From Figure 3A portion of the heat exchanger housing 12 is shown, which has a seating base 13 and has connection elements 16 and 17 coming out of the seating base 13. Here, it can be seen that the two connection elements 16 and 17 have a generally wedge-shaped outer contour in a side view of the heat exchanger housing 12, wherein the two connection elements 16 and 17 are embodied with a greater width on the end connected to the seating base 13 than on the end facing away from the seating base 13. Furthermore, the connection elements 16 and 17 have a plurality of longitudinal ribs 18 over their entire longitudinal extension for stiffening the connection elements 16 and 17. The unit consisting of the seating base 13 and the two connection elements 16 and 17 is to be produced as a plastic part by means of injection molding. Furthermore, it is known from Figure 3 that the connection elements 16 and 17 consist of a flat base part 19 provided with longitudinal ribs 18 and a sealing element 21 configured as a sealing strip 20. The sealing strip 20 extends from the edge of the base part 19 and is springingly configured with respect to the base part 19.

[0041] Furthermore, it is known from Figure 4 and Figure 4a that the arrangement or the arrangement of the sealing strip 20. According to Figure 4 , the sealing strip 20 is in its unstressed or relaxed state and is clamped at an obtuse angle a with the base part 19. A rounded edge 22 is provided on the transition from the sealing strip 20 to the base part 19, by means of which the sealing strip 20 can be springingly swung with respect to the base part 19. For the function of the sealing strip 20, it is necessary that the sealing strip 20 is arranged to be freely movable with respect to the seating base 13. In the case of the unit consisting of the connection elements 16 and 17 and the seating base 13 being produced from plastic, this movability of the respective sealing strip is thus achieved in that a recess 23 is provided in the adjoining area of the seating base 13.

[0042] However, process air can escape from the process air channel 3 through the recess 23, and it is therefore necessary to close the recess 23, for which a plug 24 is provided which is form-fittingly inserted into the recess 23. In order to provide such a plug 24, a correspondingly dimensioned and shaped free space of the seating base 13 can be used in such a region of the seating base 13 which is covered by the heat exchanger 6 or 7 arranged on the seating base 13.

[0043] From Figure 4 , 4a and 5, it is known that the correspondingly shaped region of the seating base 13 is provided with a free space 25 on three peripheral edges and with a film hinge 26 on the other edge. In order to illustrate the swinging movement of the sealing strip 20, the sealing strip 20 is shown in Figure 4aare shown in further different swivel positions, which are designated with 20' and 20".

[0044] Furthermore, it is seen from the cross-sectional view of the installation base 13 according to Figure 5 how the filler 24 can be swiveled from the position it occupies after the production of the installation base 13 is completed into the position for closing the gap 23. The filler 24 is here first of all in its initial position inside the installation base 13 by means of the swivel arm 27 and by means of the film hinge 26 connected to the installation base 13. The swivel movement of the filler 24 is illustrated by its further positions, which are designated with 24' and 24". Finally, the filler is in the inserted position in the gap 23, which is designated with 24'".

[0045] The base assembly 11 is shown in Figure 6 with the installation base 13 and with the connection elements 16 which are constructed jointly with the installation base 13. In the four corners of the installation base 13 which is constructed essentially rectangularly, guide rails 28 and 29 are arranged which run at an acute angle to the perpendicular, so that jointly with the wedge-shaped connection elements 16 each a trapezoidal reception 30 (or 31) is produced. The same applies for the connection elements 17 and further guide rails which are not visible in the drawing.

[0046] The contact faces 32 and 33 of the first heat exchanger 6 and the contact faces 34 and 35 of the second heat exchanger 7 run at the same inclination to the perpendicular, which after their installation rest against the guide faces of the guide rails 28 and 29 and against the previously explained sealing strips 20 of the connection elements 16 and 17. The guide rails 28 and 29 can be constructed as angle profiles and seal the heat exchangers 6 and 7 on the respective corner.

[0047] In Figure 6 , the two heat exchangers 6 and 7 are in a position in which they are oriented opposite to the heat exchanger housing 12. From this position, the two heat exchangers 6 and 7 are sunk in Figure 6a , to the extent that they are supported on the installation base 13. Here, the heat exchangers 6 and 7 with their outer contact faces 32, 33, 34 and 35 rest on the guide rails 28 and 29 on one side and are pressed against the flexible sealing strips 20 of the connection elements 16 shown by way of example on the basis of the inclined faces, wherein the sealing strips 20 rest sealingly on the areas of the outer surfaces of the heat exchangers 6 and 7 which face the sealing strips 20.

[0048] According to Figure 7 The heat exchanger housing 12 is thus realized as a unit: on the side of the heat exchangers 6 and 7 facing away from the seating bottom 13, an end cap 36 is arranged and is fixed on the end of the four guide rails 28, 29. Between the end cap 36 and the heat exchangers 6 and 7, a seal is preferably likewise arranged.

[0049] List of reference signs

[0050] 1 laundry dryer

[0051] 2 laundry drum

[0052] 3 process air channel

[0053] 3a supply air section of the process air channel 3

[0054] 3b exhaust air section of the process air channel 3

[0055] 4 process air fan

[0056] 5 heat pump

[0057] 6 first heat exchanger (condenser)

[0058] 7 second heat exchanger (evaporator)

[0059] 8 refrigerant circuit

[0060] 9 compressor

[0061] 10 throttle

[0062] 11 bottom assembly of the laundry dryer 1

[0063] 12 heat exchanger housing

[0064] 13 seating bottom of the bottom assembly 11

[0065] 14 intermediate space

[0066] 15 channel section in the intermediate space 14

[0067] 16 connecting element

[0068] 17 connecting element

[0069] 18 longitudinal rib of the connecting element 16 and the connecting element 17

[0070] 19 base piece of the connecting element 16 and the connecting element 17

[0071] 20 sealing strip of the connecting element 16 and the connecting element 17

[0072] 20' sealing strip in another position

[0073] 20" sealing strip in another position

[0074] 21 sealing element connecting element 16 and connecting element 17

[0075] 22 round rim between base 19 and sealing strip 20

[0076] 23 recess in seating bottom 13

[0077] 24 filling element

[0078] 24' filling element in another position

[0079] 24" filling element in another position

[0080] 24"' filling element in inserted position in recess 23

[0081] 25 free space in seating bottom 13

[0082] 26 film hinge of filling element 24

[0083] 27 swing arm of filling element 24

[0084] 28 guide rail

[0085] 29 guide rail

[0086] 30 receiving part for first heat exchanger (condenser) 6

[0087] 31 receiving part for second heat exchanger (evaporator) 7

[0088] 32 contact surface of first heat exchanger (condenser) 6

[0089] 33 contact surface of first heat exchanger (condenser) 6

[0090] 34 contact surface of second heat exchanger (evaporator) 7

[0091] 35 contact surface of second heat exchanger (evaporator) 7

[0092] 36 end cap of heat exchanger housing 12

[0093] α angle between base 19 and sealing strip 20

Claims

1. An arrangement consisting of a heat exchanger (6 and 7) of a heat pump (5) of a laundry drying machine (1), through which the process air of the laundry drying machine flows, arranged on a seating bottom (13) belonging to a bottom assembly (11) of the laundry drying machine (1), wherein, The heat exchangers (6 and 7) comprise two heat exchangers (6 and 7) between which, viewed in the flow direction of the process air, an intermediate space (14) is provided in which the transition of the channel section (15) of the process air channel (3) formed by the two heat exchangers (6 and 7) is laterally delimited by two connecting elements (16 and 17) which run vertically and parallel to one another and spaced apart from one another, wherein the connecting elements (16 and 17) are connected or connectable on one side to the seating base (13) and on the other side to an upper end cap (36) and rest against the contact faces (32 and 35) of the heat exchangers (6 and 7), respectively, characterized in that the connecting elements (16 and 17) are provided over the entire section of the edge of their lengthwise run with a sealing element (21) against which the flatly configured contact faces (32 and 35) of the heat exchangers (6 and 7) resting on the seating base (13) rest, the connecting elements (16 and 17) each have a flat base piece (19) which delimits the process air channel (3) and a sealing strip (20) which serves as a sealing element (21) and which extends in a direction away from the process air channel (3), the sealing strip runs at an obtuse angle (a) with respect to the base piece (19) in a stress-free state and can be elastically deflected with respect to the base piece (19) and the seating base (13) in order to be able to rest against the respective contact face of the heat exchanger in a preloaded manner.

2. The device assembly of claim 1, wherein, The connecting elements (16 and 17) extend from the seating base (13) and are configured in one piece therewith.

3. The device assembly of claim 2, wherein, The connecting elements (16 and 17) have a lengthwise running reinforcing rib (18) in which one end is connected to the seating base (13).

4. The device assembly of claim 1, wherein, One end of the connecting elements (16 and 17) is inserted in a form-locking manner into the end cap (36).

5. The device assembly of claim 1, wherein, The seating base (13) and the connecting elements (16 and 17) are made of plastic.

6. The device assembly of claim 1, wherein, Viewed in cross section, the connecting elements (16 and 17) have a U-shaped outer contour, wherein the sealing element (21) is formed by the outer leg of the connecting elements (16 and 17).

7. The assembly of any of claims 1-6, wherein, The sealing strip (20) is injection molded onto the base piece (19) by means of a connecting section (22) which has a thinner wall with respect to the wall thickness of the sealing strip.

8. The device assembly of claim 1, wherein, The connecting elements (16 and 17) are wedge-shaped in their lengthwise extent, so that the sealing element (21) of the sealing strip (20) runs at an angle with respect to the perpendicular of the respective connecting element (16 and 17) and the contact faces (32 and 35) of the heat exchangers (6 and 7) are configured obliquely at the same angle.

9. The assembly of claim 1-6, 8, wherein, The seating base (13) has a recess (23) in the region of the end side facing the sealing strip (20), which can be closed by a plug (24).

10. The device assembly of claim 9, wherein, The plug (24) can be swung into the recess (23) from a region of the seating base (13) that is outside the process air channel (3) by means of a film hinge (26).

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