EP3556929B1 - Floor assembly for a device for drying laundry - Google Patents

Description

The invention relates to a floor assembly for a device for drying laundry, having at least one heat pump with heat exchangers that can be thermally coupled to a process air system of the device and at least one heat exchanger housing in which the heat exchangers are arranged, the heat exchanger housing having at least one installation floor on which the heat exchangers are placed and has at least one cover part covering the heat exchangers on a side facing away from the installation floor. The invention also relates to a device for drying laundry.

Devices for drying laundry are known in a variety of configurations. In particular, devices for drying laundry are known which have a closed process air system with a drying chamber receiving laundry to be dried and a heat pump thermally coupled to the process air system to recover heat from the process air circulating in the process air system. The heat pump forms part of a floor assembly of the device which is located on the floor below the drying chamber and through which a section of the process air system runs.

A heat pump has two heat exchangers thermally coupled to the process air system, namely a heat exchanger (evaporator) that cools and dehumidifies the process air exiting the drying chamber and a heat exchanger (condenser) that heats the process air to be supplied to the drying chamber. For this purpose, the heat exchangers are arranged in a heat exchanger housing of the floor assembly, through which the process air is passed and which thus forms a section of the process air system.

A conventional heat exchanger housing has a mounting base on which the heat exchangers are set up, and side walls laterally surrounding the heat exchangers. In addition, the conventional heat exchanger housing has a plastic cover which is arranged on a side of the heat exchanger facing away from the installation base and is connected to the side walls. Refrigerant lines of a refrigerant circuit of the heat pump are usually passed through one of the side walls to be able to connect the heat exchanger to a compressor arranged outside the heat exchanger housing and to a correspondingly arranged expansion unit of the heat pump. The corresponding bushings on the side wall are conventionally sealed off from the respective refrigerant line by means of a seal in each case.

Such a conventional heat exchanger housing is usually air-permeable to ambient air. As a result, ambient air can enter the heat exchanger housing and mix with the process air flowing therein and / or flow past the heat exchangers. After flowing through the evaporator, the process air passes through the so-called pressure transition point, which ensures that there is a negative pressure in the area of the condenser, through which the ambient air is sucked into the heat exchanger housing. Since the heat exchanger and the housing components of the heat exchanger housing have different structural tolerances, there can be gaps between the housing components and the heat exchangers and bypass flows arise within the heat exchanger housing.

A heat pump contains a refrigerant that circulates in a closed circuit and is cyclically evaporated while absorbing heat and is condensed while releasing heat. The evaporation of the refrigerant takes place mainly in the evaporator of the heat pump. The refrigerant flows into the evaporator as a mixture of liquid and gas. The refrigerant then reaches a compressor in the heat pump as a gas, where it is compressed. The compressor is also the drive that drives the refrigerant through the closed circuit. The compressed refrigerant arrives from the compressor to the condenser of the heat pump, where it is liquefied while releasing heat. From the liquefier, the liquefied refrigerant passes into an expansion device, in particular a valve, a diaphragm or a capillary, in which the internal pressure of the refrigerant is reduced and in which the refrigerant is already partially converted back into gas. The resulting mixture of liquid and gas is returned to the evaporator.

EP 3 124 682 A1 discloses a heat pump dryer with a treatment chamber for drying laundry located therein by means of process air of a process air system and a heat pump that is thermally coupled to the process air system. The The heat pump dryer has a grid which is arranged between the heat exchangers of the heat pump so that the process air flowing through the heat exchanger used as an evaporator is at least partially guided to the heat exchanger designed as a condenser.

One object of the invention is to prevent ambient air from being mixed with process air flowing through a floor pan of a device for drying laundry and to prevent bypass process air flows from forming within a heat exchanger housing of the floor pan.

This object is achieved by the independent claims. Advantageous configurations are given in the following description, the dependent claims and the figures, whereby these configurations, taken individually or in combination of at least two of these configurations with one another, can represent a further developing, in particular also preferred or advantageous, aspect of the invention. Configurations of the floor pan can correspond to configurations of the device, and vice versa, even if this is not explicitly referred to in the following in individual cases.

A floor assembly according to the invention for a device for drying laundry has at least one heat pump with heat exchangers that can be thermally coupled to a process air system of the device and at least one heat exchanger housing in which the heat exchangers are arranged, the heat exchanger housing at least one installation floor on which the heat exchangers are set up , and has at least one cover part covering the heat exchangers on a side facing away from the installation floor. The cover part has at least one cover element covering the heat exchangers on the side facing away from the installation floor and two projections connected to the cover element, running parallel to one another, spaced apart from one another and extending at least to the installation floor, which at least partially run between the heat exchangers and at least indirectly contact, wherein a channel section of the process air system formed between the heat exchangers is sealed airtight on a side facing away from the installation floor by means of at least one sealing element, which is arranged on a side of the cover element facing the installation floor, and laterally by means of the projections. According to the invention, the duct section of the process air system between the heat exchangers is sealed airtight at least on its top side facing the cover part and laterally, which reliably prevents ambient air from penetrating the top or the side of the duct section and mixing with the process air flowing in the duct section. In addition, the inventive sealing of the duct section of the process air system reliably prevents process air exiting the evaporator from exiting upwards and / or to the side of the duct section and flowing past the condenser as a bypass process air flow, which increases the drying effectiveness and energy efficiency accordingly equipped device for drying laundry.

The heat pump can be of conventional design and, in addition to the heat exchangers, have a compressor for compressing a refrigerant of the heat pump and an expansion unit for expanding the refrigerant. The compressor and the expansion unit are preferably arranged outside the heat exchanger housing and are connected to the heat exchangers via refrigerant lines of the heat pump.

The heat exchanger housing has the installation base and the cover part. The inventive sealing of the duct section of the process air system can in particular prevent process air flowing out of the evaporator from exiting the duct section and flowing laterally past the condenser, so that conventional side walls that are arranged laterally on the condenser with respect to a flow direction of the process air are Floor pan according to the invention are not required. The heat exchanger housing can be designed to be open at least on one side of the condenser. This reduces the cost of materials for producing the floor pan according to the invention. In addition, there does not have to be a side wall with line bushings through which the refrigerant lines of the heat pump, which are connected to the condenser, are passed. By omitting such a side wall with line bushings, there is significantly greater design freedom in the design of the condenser with regard to its line inlets and line outlets, so that different condensers can be installed in the assembly according to the invention without a structural change of Housing components must be done. In this way, for example, a condenser can be installed, the design of which is optimized with regard to the heat transfer from the refrigerant to the process air. For example, a wider condenser can be installed. The condenser can also be designed in such a way that pressure losses in the process air are reduced. Omitting a side wall with line bushings also has the advantage that no seals are required to seal the side wall in the area of each line bushing with respect to the respective refrigerant line, which further reduces the production costs of the floor assembly according to the invention. In addition, the omission of a side wall with line bushings and seals arranged thereon is associated with a cost-reducing reduction in the assembly effort for producing the floor pan according to the invention. Alternatively, a side wall with line bushings can also be designed to be smaller or with a lower overall height.

The cover element can be connected monolithically to the projections. For example, the cover element and the projections can be produced by a common injection molding process. Here, the cover element and the projections can be made, for example, as an injection-molded component made of plastic. The cover element extends continuously over the heat exchanger and the duct section of the process air system formed between them. The projections run transversely to the cover element.

The projections laterally limit the duct section of the process air system. For this purpose, the projections between the heat exchangers run parallel to one another and are arranged at a distance from one another. The projections can also extend beyond the support base, for which purpose corresponding openings can be formed on the support base, through which the projections can be passed. Alternatively, two recesses or recesses that are open in the direction of the cover element can be formed on the support base, into which the projections engage, preferably in a form-fitting manner. The projections can contact the heat exchangers directly. Alternatively, the projections can indirectly contact the heat exchangers via intermediate elements, for example sealing elements.

The sealing element arranged between the cover element and the duct section of the process air system can be made of an elastic material in order to be able to nestle at least against end sections of the upper sides of the heat exchangers facing the cover element, which are arranged facing each other, whereby the duct section on the side facing away from the installation floor can be snuggled with the sealing element is reliably sealed. The sealing element can be designed to be thermally insulating.

According to an advantageous embodiment, each heat exchanger has on a side facing the channel section two lateral contact flanges extending over at least part of a height of the respective heat exchanger, each of which is in at least indirect contact with one of the projections, with the same projection in at least indirect contact standing contact flanges are arranged inclined in opposite directions to one another in such a way that a distance between these contact flanges is continuously reduced in the direction of the installation floor, each projection having contact surfaces inclined in opposite directions according to the contact flanges in contact therewith, and each heat exchanger between the projections and on one of the Projections on the opposite side of the respective heat exchanger, in the vertical direction transverse to the installation floor and parallel to one another, arranged at a distance from one another delements of the heat exchanger housing is clamped. According to this, the projections are wedge-shaped and each inserted into a wedge-shaped installation space between the respective contact flanges. Preferably, the heat exchangers can be freely positioned on the installation floor and / or are arranged on the installation floor such that they can be displaced by a certain amount with respect to the direction of the process air flow through the heat exchanger housing.

When installing the floor assembly, the heat exchangers can first be placed on the installation floor. The cover part can then be installed, the projections being pressed progressively between the heat exchangers, whereby the heat exchangers are progressively pushed away from each other and thereby moved in opposite directions on the installation floor until the heat exchangers come into at least indirect contact with the respective wall elements. Pressing in the projections between the heat exchangers further into their end positions causes the heat exchangers are pressed against the respective wall elements, whereby the heat exchangers are clamped between the projections of the respective wall elements.

The contact flanges arranged on the side of the respective heat exchanger facing the channel section can extend over the entire height of the heat exchanger. The contact flanges can contact the respective projection directly. Alternatively, the contact flanges can contact the projections indirectly via intermediate elements, for example sealing elements.

A further advantageous embodiment provides that each wall element extends over the height of the respective heat exchanger and each heat exchanger has two lateral contact flanges extending over the height of the respective heat exchanger on a side facing away from the channel section, each of which is in at least indirect contact with one of the Wall elements stand. In this way, for example, the evaporator is connected laterally in an airtight manner via the wall elements to a supply air section of the process air system which opens into the heat exchanger housing. This can reliably prevent process air supplied to the heat exchanger housing from flowing laterally past the evaporator as a bypass process air flow. As a result, conventional side walls, which are arranged laterally on the evaporator with respect to a flow direction of the process air, are not required in the floor pan according to the present embodiment. The heat exchanger housing can be designed to be open at least on one side of the evaporator. This reduces the cost of materials for producing the floor pan according to the invention. In addition, there does not have to be a side wall with line bushings through which the refrigerant lines of the heat pump, which are connected to the evaporator, are passed. By omitting such a side wall with cable bushings, there is significantly greater design freedom in the design of the evaporator with regard to its line inlets and line outlets, so that different evaporators can be installed in the assembly without structural changes to the housing components. In this way, for example, an evaporator can be installed, the design of which is optimized with regard to the heat transfer from the process air to the refrigerant. For example, a wider evaporator can be installed. The evaporator can also be designed in such a way that pressure losses in the process air are reduced. The omission of a side wall with cable bushings furthermore has the advantage that no seals are required to seal the side wall in the area of each line bushing with respect to the respective refrigerant line, which further reduces the production costs of the floor pan. In addition, the omission of a side wall with cable bushings and seals arranged thereon is associated with a cost-reducing reduction in the assembly effort for producing the floor pan. Alternatively, a side wall with line bushings can also be designed to be smaller or with a lower overall height. If the side wall with ducts is omitted, one side of the evaporator is exposed in the floor pan, so that moisture can be expected to condense on the exposed side of the evaporator. As a result, the humidity within a suitably equipped device for drying laundry can be reduced. This can prevent the presence of water condensate on a control panel. It is also possible to omit the entire conventional side wall with line bushings, which extends continuously along the evaporator, the condenser and the duct section of the process air system lying therebetween, which is associated with the advantages mentioned above.

At least one contact flange is advantageously designed and / or arranged to be resilient. As a result, the contact flange can be brought into resilient contact with the respective projection or the respective wall element, so that a structural tolerance compensation can be created in the process air flow direction through the heat exchanger housing. The contact flange is elastically deformed and / or displaced here by the at least indirect contact with the respective projection or the respective wall element while generating a restoring force. The contact flange can, for example, be L-shaped in cross section. Preferably, all contact flanges are formed and / or arranged springs.

According to a further advantageous embodiment, at least one sealing rib extending over at least part of a height of the wall element is formed on a side of the respective wall element facing the respective heat exchanger. The sealing rib can be brought into direct contact with the respective contact flange in order to seal the respective heat exchanger airtight from the respective wall element. The sealing rib can also extend over the entire height of the extend respective wall element. Two or more sealing ribs running at a distance from one another can also be formed on the respective wall element.

According to a further advantageous embodiment, at least one sealing element is arranged between at least one wall element and at least one contact flange, which sealing element extends over at least part of the height of the wall element. As a result, the respective wall element is indirectly connected to the respective contact flange via the sealing element in order to seal the respective heat exchanger airtight with respect to the respective wall element. The sealing element can also extend over the entire height of the respective wall element. The sealing element can be formed from a foam, for example. Two or more sealing elements running at a distance from one another can also be arranged on the respective wall element.

A further advantageous embodiment provides that the sealing element is a flexible, elastically deformable mat which additionally covers the sides of the heat exchangers facing the cover element. This also prevents process air flowing through the heat exchangers from exiting at the top of the heat exchangers and forming a bypass process air flow, which improves the drying effectiveness of a correspondingly equipped device for drying laundry.

According to a further advantageous embodiment, the sealing element is materially connected to the side of the cover element facing the installation base. This simplifies the assembly of the sealing element, which is inevitably attached to the rest of the floor assembly by assembling the cover part. The sealing element can, for example, be glued to the side of the cover element facing the installation base.

According to a further advantageous embodiment, at least one heat exchanger and / or the cover part are or is connected to the heat exchanger housing via at least one latching connection. In this way, the heat exchanger and / or the cover part can be fixed to the rest of the floor assembly. In particular, this prevents wedge-shaped projections between the heat exchangers from being inadvertently moved out of the installation space between the heat exchangers due to operational vibrations.

A device according to the invention for drying laundry has at least one floor assembly according to one of the above-mentioned configurations or a combination of at least two of these configurations with one another.

The advantages mentioned above with reference to the floor pan are correspondingly associated with the device. The device for drying laundry can be designed, for example, as a tumble dryer, a washer-dryer or a drying cabinet. The device has a process air system that has a drying chamber that is connected to the heat exchanger housing of the floor pan via process air ducts.

Fig. 1

eine schematische und perspektivische Darstellung eines Ausführungsbeispiels für eine erfindungsgemäße Bodengruppe;

Fig. 2

eine schematische und perspektivische Darstellung eines Abschnitts der in Fig. 1 gezeigten Bodengruppe;

Fig. 3

eine schematische Schnittdarstellung der in Fig. 1 gezeigten Bodengruppe;

Fig. 4

eine weitere schematische Schnittdarstellung der in Fig. 1 gezeigten Bodengruppe;

Fig. 5

eine Draufsicht der in Fig. 1 gezeigten Bodengruppe;

Fig. 6

eine schematische und perspektivische Darstellung des in Fig. 1 gezeigten Abdeckteils;

Fig. 7A

eine schematische Darstellung eines Details der in Fig. 1 gezeigten Bodengruppe in einem Montagezustand; und

Fig. 7B

eine schematische Darstellung des in Fig. 7A gezeigten Details in einem weiteren Montagezustand.

In the following, the invention is explained by way of example with reference to the attached figures using a preferred embodiment. Show it:

Fig. 1

a schematic and perspective illustration of an embodiment for a floor pan according to the invention;

Fig. 2

a schematic and perspective illustration of a portion of the in Fig. 1 floor pan shown;

Fig. 3

a schematic sectional view of the in Fig. 1 floor pan shown;

Fig. 4

a further schematic sectional view of the in Fig. 1 floor pan shown;

Fig. 5

a top view of the in Fig. 1 floor pan shown;

Fig. 6

a schematic and perspective representation of the in Fig. 1 cover part shown;

Figure 7A

a schematic representation of a detail of the in Fig. 1 floor assembly shown in an assembled state; and

Figure 7B

a schematic representation of the in Figure 7A Details shown in a further assembly state.

Fig. 1 shows a schematic and perspective representation of an embodiment of a floor assembly 1 according to the invention for a device (not shown) for drying laundry.

The floor assembly 1 has a basic construction 2 which is used to hold various components of the floor assembly 1 and on which an inlet air section 3 and an exhaust air section 4 of a process air system (not shown) of the device are formed, each of which is connected in a communicating manner to a heat exchanger housing 5 of the floor assembly 1, in which a heat pump 6 with heat exchangers 7 (evaporator) and 8 (condenser) that can be thermally coupled to the process air system is arranged. The heat exchanger housing 5 has one in the Figs. 2 to 4 shown installation floor on which the heat exchangers 7 and 8 are set up, and a cover part 9 covering the heat exchangers 7 and 8 on a side facing away from the installation floor. The heat pump 6 also has a compressor 10 and an expansion unit 11, which are connected to the heat exchangers 7 and 8 via refrigerant lines 12 of the heat pump 6. At least one heat exchanger 7 or 8 and / or the cover part 9 are or is connected to the heat exchanger housing 5 via at least one latching connection (not shown).

The cover part 9 has a cover element 13 covering the heat exchangers 7 and 8 on the side facing away from the installation base and two projections 14 connected to the cover element 13, running parallel to one another, arranged at a distance from one another and extending at least as far as the installation base, of which in Fig. 1 only one projection 14 is shown, which partially extend between the heat exchangers 7 and 8 and contact them at least indirectly. A formed between the heat exchangers 7 and 8, in the Fig 3 , 5 and 7A The channel section of the process air system shown is on a side facing away from the installation floor by means of an in the Figs. 3 , 4th , 7A and 7B Sealing element shown, which is arranged on a side of the cover element 13 facing the placement floor, and is laterally sealed airtight by means of the projections 14. The sealing element is a flexible, elastically deformable mat, which additionally covers the sides of the heat exchangers 7 and 8 facing the cover element 13 covers, as in the Figs. 3 , 4th , 7A and 7B is shown. The sealing element can be materially connected to the side of the cover element 13 facing the mounting base.

The further structure of the floor group 1 results from the description of the Figs. 2 to 7A .

Fig. 2 FIG. 11 shows a schematic and perspective illustration of a section of the FIG Fig. 1 1. Only the heat exchanger housing 5 with the heat exchangers 7 and 8 arranged therein is shown. It can be seen that the projections 14 engage in recesses 23 formed on the mounting base 16.

Each heat exchanger 7 or 8 has one of the in the Fig 3 , 5 and 7A The side facing the channel section shown has two lateral contact flanges 15 extending over a height of the respective heat exchanger 7 or 8, of which in FIG Fig. 2 only one contact flange 15 is shown and each of which is in at least indirect contact with one of the projections 14. The contact flanges 15 are resilient and / or arranged. Contact flanges 15 which are in at least indirect contact with the same projection 14 are arranged inclined in opposite directions in such a way that a distance between these contact flanges 15 is continuously reduced in the direction of the mounting base 16 of the heat exchanger housing 5. Each projection 14 has contact surfaces 17 arranged so as to be inclined in opposite directions in accordance with the contact flanges 15 in contact therewith. Each heat exchanger 7 or 8 is arranged between the projections 14 and on a side of the respective heat exchanger 7 and 8 opposite the projections 14, in the vertical direction transverse to the installation floor 16 and parallel to one another, spaced apart from one another, in Fig. 5 wall elements shown of the heat exchanger housing 5 clamped.

Each wall element extends over the height of the respective heat exchanger 7 or 8. Each heat exchanger 7 or 8 has on a side facing away from the channel section two lateral contact flanges 18 extending over the height of the respective heat exchanger 7 or 8, each of which is at least are in indirect contact with one of the wall elements. On a side of the respective wall element facing the respective heat exchanger 7 or 8, FIGS Fig. 5 shown to be about a height of Wall element extending sealing ribs formed. At least one sealing element, not shown, which extends over at least part of the height of the wall element, can be arranged between at least one wall element and at least one contact flange.

Fig. 3 shows a schematic sectional illustration of the in Fig. 1 Floor assembly 1 shown in the area of the projections 14. A section of the sealing element 19 clamped between the cover element 13 and the heat exchanger 8 can be seen. In addition, a drain 20 embodied on the support base 16 can be seen, via which a rinsing liquid conducted via the heat exchanger 8 can flow off. Furthermore, the duct section 21 of the process air system lying between the projections 14 can be seen.

Fig. 4 shows a further schematic sectional illustration of the in Fig. 1 Floor group 1 shown. In addition, a drain 22 can be seen on the installation floor 16, via which a condensate formed on the heat exchanger 7 can flow off. It can also be seen that the sealing element 19 is arranged continuously on the cover element 13.

Fig. 5 shows a top view of the in Fig. 1 floor assembly 1 shown without the cover part. In the in Fig. 5 Enlargements shown on the right and one above the other show that the contact flanges 18 of the heat exchanger 8 are each connected to the respective wall element 24 via two sealing ribs 25 formed on the respective wall element 24 and that the contact flanges 18 of the heat exchanger 7 are each connected via three on the respective wall element 26 formed sealing ribs 25 are connected to the respective wall element 26.

Fig. 6 shows a schematic and perspective representation of the in Fig. 1 Cover part 9 shown. The monolithic connection of the projections 14 to the cover element 13 and the wedge-shaped configuration of the projections 14 can be seen.

Figure 7A shows a schematic representation of a detail of the in Fig. 1 floor assembly 1 shown in an assembled state. During this assembly state, the projections 14 are pushed between the heat exchangers 7 and 8 according to the arrow 27. By contact of the projections 14 with the heat exchangers 7 and 8, the Heat exchangers 7 and 8 are pushed away from one another according to arrows 28 and 29 and pressed against the respective wall elements, not shown.

Figure 7B shows a schematic representation of the in Figure 7A Details shown in a further assembly state. This assembly state is based on the in Figure 7A shown assembly state that the projections 14 have been brought into their end positions shown and thus hold the heat exchangers 7 and 8 securely in the positions shown.

List of reference symbols:

1

Floor pan

2

Basic construction

3

Supply air section

4th

Exhaust section

5

Heat exchanger housing

6th

Heat pump

7th

Heat exchanger (evaporator)

8th

Heat exchanger (condenser)

9

Cover part

10

compressor

11

Expansion unit

12

Refrigerant line

13

Cover element

14th

head Start

15th

Contact flange

16

Installation shelf

17th

Contact area of 14

18th

Contact flange

19th

Sealing element

20th

Expiry on 16

21st

Channel section

22nd

Expiry on 16

23

Recess at 16

24

Wall element

25th

Sealing rib

26th

Wall element

27

Arrow (push-in movement of 14)

28

Arrow (displacement movement of 7)

29

Arrow (displacement movement of 8)

Claims (10)

1. Floor assembly (1) for a device for drying laundry, having at least one heat pump (6) that can be thermally coupled to a process air system of the device, with heat exchangers (7, 8) and at least one heat exchanger housing (5) in which the heat exchangers (7, 8) are arranged, wherein the heat exchanger housing (5) has at least one installation base (16) on which the heat exchangers (7, 8) are installed, and at least one cover part (9) covering the heat exchangers (7, 8) on a side facing away from the installation base (16), characterised in that the cover part (9) has at least one cover element (13) covering the heat exchangers (7, 8) on the side facing away from the installation base (16) and two projections (14) connected to the cover element (13), extending parallel to one another, arranged spaced apart from one another and extending at least as far as the installation base (16), said projections (14) running at least partially between the heat exchangers (7, 8) and contacting them at least indirectly, wherein a duct section (21) of the process air system formed between the heat exchangers (7, 8) is sealed airtight on a side facing away from the installation base (16) by means of at least one sealing element (19) arranged on a side of the cover element (13) facing the installation base (16), and laterally by means of the projections (14).
2. Floor assembly (1) according to claim 1, characterised in that each heat exchanger (7, 8) on a side facing the duct section (21) has two lateral contact flanges (15) extending over at least part of a height of the respective heat exchanger (7, 8), each contact flange (15) being in at least indirect contact with one of the projections (14) in each case, wherein contact flanges (15) in at least indirect contact with the same projection (14) are inclined in opposite directions to one another such that a distance between these contact flanges (15) is continuously reduced in the direction of the installation base (16), wherein each projection (14) has contact surfaces (17) arranged inclined in opposite directions to one another corresponding to the contact flanges (15) in contact therewith, and wherein each heat exchanger (7, 8) is clamped between the projections (14) and on wall elements (24, 26) of the heat exchanger housing (5) which are arranged on a side of the respective heat exchanger (7, 8) opposite the projections (14), run in the vertical direction transversely to the installation base (16) and parallel to one another, and are arranged spaced apart from one another.
3. Floor assembly (1) according to claim 2, characterised in that each wall element (24, 26) extends over the height of the respective heat exchanger (7, 8) and each heat exchanger (7, 8) has on a side facing away from the duct section (21) two lateral contact flanges (18) which extend over the height of the respective heat exchanger (7, 8) and which are each in at least indirect contact with one of the wall elements (24, 26) in each case.
4. Floor assembly (1) according to claim 2 or 3, characterised in that at least one contact flange (15, 18) is formed and/or arranged as resilient.
5. Floor assembly (1) according to claim 3 or 4, characterised in that on a side of the respective wall element (24, 26) facing the respective heat exchanger (7, 8) at least one sealing rib (25) extending over at least part of a height of the wall element (24, 26) is formed.
6. Floor assembly (1) according to one of claims 3 to 5, characterised in that at least one sealing element is arranged between at least one wall element (24, 26) and at least one contact flange (18) and extends over at least part of the height of the wall element (24, 26).
7. Floor assembly (1) according to one of claims 1 to 6, characterised in that the sealing element (19) is a flexible, elastically deformable mat which also covers the sides of the heat exchangers (7, 8) facing the cover element (13).
8. Floor assembly (1) according to one of claims 1 to 7, characterised in that the sealing element (19) is material-bonded to the side of the cover element (13) facing the installation base (16).
9. Floor assembly according to one of claims 1 to 8, characterised in that at least one heat exchanger (7, 8) and/or the cover part (9) are or is connected to the rest of the heat exchanger housing (5) via at least one latching connection.
10. Device for drying laundry, characterised by a floor assembly (1) according to one of claims 1 to 9.

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