Heat exchanger device for a laundry treatment machine

Abstract

The invention relates to a heat exchanger device (2) for a laundry treatment machine (1), comprising a first heat exchanger (4) with two first side plates (6, 8) and a second heat exchanger (10) with two second side plates (12, 14), wherein the respective side plates (6, 8 and 12, 14) are arranged opposite each other at each free end of the corresponding heat exchanger (4, 10), and wherein the two heat exchangers (4, 10) are arranged one after the other along a flow path (20) of process air (16) of the laundry treatment machine (1) in an operating state of the heat exchanger device (2) and are connected to each other at both of the aforementioned free ends by means of the corresponding first and second side plates (6, 12 and 8, 14) to form a unit, characterized in that the corresponding first and second side plates (6, 12 and 8,14) are unconnected in a pre-assembly state of the heat exchanger device (2) and can each be connected to one another by means of a mounting plate (22, 24) for the purpose of transferring the heat exchanger device (2) into an assembly state of the heat exchanger device (2), wherein the respective mounting plate (22, 24) has a lower thermal conductivity coefficient compared to the first and second side plates (6, 12 and 8, 14).

Description

[0001] The invention relates to a heat exchanger device for a laundry treatment machine of the type mentioned in the preamble of claim 1.

[0002] Such heat exchanger devices for laundry treatment machines are already known in the art in a multitude of embodiments. The known heat exchanger devices comprise a first heat exchanger with two first side plates and a second heat exchanger with two second side plates, wherein the respective side plates are arranged opposite each other at each free end of the corresponding heat exchanger, and wherein the two heat exchangers are arranged one after the other along a flow path of process air from the laundry treatment machine in an operating state of the heat exchanger device and are connected to each other at both of the aforementioned free ends by means of the corresponding first and second side plates to form a single unit.These heat exchanger devices are integrated, in a manner known to those skilled in the art, into at least one housing part of a known base module of the laundry treatment machine. The side plates also ensure that the process air flows through the second heat exchanger, i.e., the one downstream of the first in the process air stream, and not bypass it. The heat exchangers create a flow resistance for the process air, so bypass flows must be avoided.

[0003] The invention therefore addresses the problem of improving a heat exchanger device for a laundry treatment machine.

[0004] According to the invention, this problem is solved by a heat exchanger device for a laundry treatment machine with the features of claim 1, characterized in that the corresponding first and second side plates are unconnected in a pre-assembly state of the heat exchanger device and can each be connected to one another by means of a mounting plate in order to bring the heat exchanger device into an assembled state, wherein the respective mounting plate has a lower thermal conductivity coefficient compared to the first and second side plates. The laundry treatment machine can be designed as a household appliance or as a commercial appliance, i.e., an appliance for professional use.The laundry treatment machine can be, for example, a tumble dryer, a washer-dryer (a combination appliance of a washing machine and a tumble dryer), or a laundry care cabinet.

[0005] The aforementioned base module can, for example, include a sealing agent to effectively prevent, or at least reduce, unwanted bypass flow of process air in the edge regions of the two heat exchangers of the heat exchanger device according to the invention. Advantageous embodiments and further developments of the invention are set forth in the following dependent claims.

[0006] The advantage achievable with the invention lies particularly in the fact that a heat exchanger device for a laundry treatment machine is improved. Due to the inventive design of the heat exchanger device, unwanted heat conduction between the two heat exchangers of the inventive heat exchanger device is effectively prevented, or at least significantly reduced, by means of the first and second side plates. Accordingly, the energy efficiency of the inventive heat exchanger device and the laundry treatment machine equipped with it is significantly improved in a very simple manner from a design and manufacturing perspective. Furthermore, this is possible without having to abandon the desirable space-saving arrangement of the two heat exchangers of the inventive heat exchanger device, i.e., the spatial arrangement of the two heat exchangers relative to each other.Thus, the heat exchanger device according to the invention can be designed to be both compact and highly energy-efficient. Since the heat exchanger device according to the invention is designed as a single unit in its assembled state, it can be handled as a whole during the manufacture of the laundry treatment machine equipped with it. Furthermore, due to its design as a single unit, the two heat exchangers of the heat exchanger device according to the invention are properly aligned with each other, thus ensuring the flawless functioning of the heat exchanger device according to the invention in this respect.

[0007] In principle, the heat exchanger device according to the invention for a laundry treatment machine can be freely selected within wide suitable limits with regard to type, function, material, dimensioning and arrangement.

[0008] A particularly advantageous embodiment of the heat exchanger device according to the invention provides that the thermal conductivity of each of the two mounting plates is at least 100 times, preferably at least 200 times, and particularly preferably at least 1000 times lower than the thermal conductivity of the first and second side plates. In this way, the unwanted heat transfer between the two heat exchangers of the heat exchanger device according to the invention is significantly reduced. This applies particularly to the preferred embodiment and especially to the particularly preferred embodiment of this embodiment.

[0009] A further particularly advantageous embodiment of the heat exchanger device according to the invention provides that at least one of the two mounting plates is designed as a molded plate, wherein the molded plate is shaped as an angle plate; preferably, both mounting plates are each designed as a molded plate; and particularly preferably, both mounting plates are designed as matching molded plates. This makes it possible, in a very simple manner from a design and manufacturing perspective, to give the heat exchanger device according to the invention an overall geometry that is highly advantageous for practical application in a laundry treatment machine equipped with it, namely in the form of an angle. An angled component consists of two interconnected angle arms, wherein the two angle arms enclose an angle of greater than 0° and less than 180°.The preferred embodiment of this further development has the additional advantage that the angled design of the heat exchanger device according to the invention can be implemented in this simple manner on both sides of the heat exchanger device according to the invention. The particularly preferred embodiment of this further development also has the advantage that the angled design of the heat exchanger device according to the invention can be implemented on both sides without additional angle-defining components.

[0010] The aforementioned further development significantly simplifies both the warehousing and logistics as well as the manufacturing of the heat exchanger device according to the invention, and thus of the laundry treatment machine equipped with it, without having to forgo an angled flow path of the process air through the heat exchanger device according to the invention, namely through the two heat exchangers of the heat exchanger device according to the invention. This angled flow path of the process air flowing through the heat exchanger device according to the invention in its operating state is practical and common in laundry treatment machines for reasons of installation space and from a fluid dynamics perspective.However, this embodiment of the heat exchanger device typically has the disadvantage, compared to a heat exchanger device without an angled flow path, that such heat exchanger devices require more space for storage and transport. Furthermore, these types of heat exchanger devices are more complex and therefore more expensive to manufacture. The invention, particularly according to the present embodiment, provides a remedy for this.

[0011] Another advantageous embodiment of the heat exchanger device according to the invention provides that, relative to the respective corresponding side plates, one mounting plate is arranged internally and / or the other mounting plate externally, preferably the heat exchanger device in its assembled state forms an angle in a top view of the heat exchanger device, wherein, on the one hand, the mounting plate arranged on an outside of the heat exchanger device with respect to the aforementioned angle is arranged internally or externally in the aforementioned top view relative to the two corresponding side plates, and on the other hand, the mounting plate arranged on the inside of the heat exchanger device with respect to the aforementioned angle is arranged internally in the aforementioned top view relative to the two corresponding side plates.In this way, a highly advantageous design for the construction and manufacture of the heat exchanger device according to the invention is specified. On the aforementioned outer surface of the heat exchanger device according to the invention, an external arrangement of the corresponding mounting plate is advantageous, for example, if the mounting plate is connected to the associated side plates by means of a snap-fit ​​connection. In contrast, an internal arrangement of this mounting plate on the aforementioned outer surface is advantageous, for example, if this mounting plate is connected to the associated side plates by means of a screw connection. On the aforementioned inner surface of the heat exchanger device according to the invention, an internal arrangement of the corresponding mounting plate is advantageous, for example, if a filter dryer of the heat exchanger device according to the invention is attached to the aforementioned inner surface.This is to ensure that the mounting plate is not damaged during the fastening process, for example, and can be easily mounted on the inside.

[0012] An advantageous embodiment of the aforementioned embodiment of the heat exchanger device according to the invention provides that a filter drier of the heat exchanger device is arranged on the inside of the heat exchanger device in a top view, with respect to the aforementioned angle. Preferably, the filter drier is arranged on the mounting plate associated with this inside surface. Particularly preferably, a holder for the filter drier is formed on the aforementioned mounting plate. This makes the positioning and fastening of the filter drier of the heat exchanger device according to the invention particularly advantageous from a design and manufacturing perspective. This applies especially to the preferred and, in particular, to the especially preferred embodiment of this embodiment.

[0013] A further advantageous embodiment of the heat exchanger device according to the invention provides that at least one of the two mounting plates is designed and arranged in such a way as to be compatible with at least one of the two heat exchangers, such that this mounting plate, in the assembled state of the heat exchanger device, substantially closes any gap between the corresponding first and / or second side plate and a remaining portion of the aforementioned heat exchanger. This effectively prevents gaps that may form during assembly of the heat exchanger device according to the invention, for example due to component and / or manufacturing tolerances, from leading to undesired bypass flows of the process air during operation of the heat exchanger device according to the invention.For example, in a heat exchanger designed as a finned heat exchanger, there may be an unwanted gap between at least one of the two side plates of this heat exchanger and a fin pack of this heat exchanger arranged between the two side plates.

[0014] Another advantageous embodiment of the heat exchanger device according to the invention provides that at least one of the two mounting plates is connected to the corresponding first and second side plates by means of a screw connection and / or a snap-fit ​​connection, preferably that screw elements and / or snap-fit ​​elements of the aforementioned screw connection and / or snap-fit ​​connection associated with this mounting plate are formed on this mounting plate and / or screw elements and / or snap-fit ​​elements associated with the corresponding first and second side plates. This allows the aforementioned mounting plate to be connected to the corresponding side plates in a very simple manner. This applies particularly to the preferred embodiment of this embodiment.

[0015] A further advantageous embodiment of the heat exchanger device according to the invention provides that at least the first and / or the second side plates are made of a metal, preferably steel or aluminum, and / or that at least one of the two mounting plates is made of a plastic, preferably polypropylene or polyethylene. In this way, the respective function of the two heat exchangers of the heat exchanger device according to the invention is significantly enhanced. This applies particularly to the preferred embodiment using metal. Furthermore, good thermal insulation between the two heat exchangers is achieved, so that heat conduction is significantly reduced to practically non-existent. This applies particularly to the preferred embodiment using plastic.

[0016] Another advantageous embodiment of the heat exchanger device according to the invention provides that the two heat exchangers are essentially connected to each other solely by means of the two mounting plates. This further improves the thermal insulation between the two heat exchangers. Furthermore, it enables a defined mechanical force transmission between the two heat exchangers in the assembled state of the heat exchanger device according to the invention, which is therefore well-designed from both a structural and manufacturing perspective. Moreover, it ensures that unwanted force flows at other points in the heat exchanger device according to the invention are effectively prevented. The term "essentially" here means that the two heat exchangers can also be mechanically connected to each other at other points, for example, to enable the function of the heat exchanger device according to the invention.The filter dryer mentioned above serves as a purely exemplary example. However, it is clear that such components of the heat exchanger device according to the invention must be protected from unwanted force inputs.

[0017] As already explained above, the heat exchanger device according to the invention can be freely selected within wide suitable limits. For example, an embodiment of the invention in which the corresponding side plates are connected to each other on at least one side of the heat exchanger device according to the invention only by means of the corresponding mounting plate has the advantage that the two heat exchangers can be optimally thermally insulated from each other with respect to heat conduction via these side plates.In order to increase the mechanical strength and / or stiffness of the heat exchanger device according to the invention, it can also be provided that the two heat exchangers are connected to each other at at least one of the aforementioned free ends of the two heat exchangers, on the one hand indirectly by means of the corresponding mounting plate and on the other hand directly by means of the corresponding first and second side plates, preferably that these first and second side plates each have a U-shaped cutout with a base and two legs for the aforementioned direct connection, wherein these first and second side plates are essentially only directly connected to each other by means of the two legs of the aforementioned U-shaped cutouts.The latter embodiment offers a compromise suitable for many applications between, on the one hand, optimal thermal insulation between the two heat exchangers and, on the other hand, the best possible mechanical stability of the heat exchanger device according to the invention. This applies in particular to the preferred embodiment of the latter embodiment.

[0018] A further advantageous embodiment of the heat exchanger device according to the invention provides that the first and second side plates are designed and arranged in such a way as to form a substantially laterally closed flow channel for the process air together with the two mounting plates. In this way, an undesired lateral bypass of the process air flow between the two heat exchangers of the heat exchanger device according to the invention is effectively prevented.

[0019] Furthermore, an advantageous embodiment of the heat exchanger device according to the invention provides that the heat exchanger device is designed as part of a heat pump, wherein the first heat exchanger is designed as an evaporator and the second heat exchanger as a condenser, preferably that the first heat exchanger is arranged upstream of the second heat exchanger in the flow direction of the process air. The invention is particularly advantageous in this application area, since a large temperature difference exists between the condenser and the evaporator in an operating state of the aforementioned heat pump with the heat exchanger device according to the invention. Nevertheless, it is desirable that the two heat exchangers be positioned as close together as possible in order to design the heat exchanger device according to this embodiment as compactly as possible.

[0020] An embodiment of the invention is shown purely schematically in the drawings and is described in more detail below. It shows Fig. 1 An embodiment of the heat exchanger device according to the invention in an assembly state in a laundry treatment machine, in a cutaway side view, Fig. 2. The laundry treatment machine in a cutaway top view, Fig. 3. The exemplary embodiment in a simplified detail view, in a top view, Fig. 4 the embodiment according to the Fig. 3 in a pre-assembled state, in a partial view, Fig. 5 the embodiment according to the Fig. 3 in a simplified side view, Fig. 6 the embodiment according to the Fig. 5 in one variant and Fig. 7 the embodiment according to the Fig. 6 in a single illustration of one of the side plates.

[0021] In the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 to Fig. Figure 7 is an embodiment of the heat exchanger device according to the invention, shown purely by way of example.

[0022] The heat exchanger device 2 is here designed to be suitable for a laundry treatment machine 1 designed as a household clothes dryer and comprises a first heat exchanger 4 with two first side plates 6, 8 and a second heat exchanger 10 with two second side plates 12, 14, wherein the respective side plates 6, 8 and 12, 14 are arranged opposite each other at each free end of the corresponding heat exchanger 4, 10, and wherein the two heat exchangers 4, 10 are arranged one after the other along a flow path of a process air 16 of the laundry treatment machine 1 in an operating state of the heat exchanger device 2 and are connected to each other at both of the aforementioned free ends by means of the corresponding first and second side plates 6, 12 and 8, 14 to form a unit.In the present embodiment, the heat exchanger device 2 is designed as part of a heat pump 18, wherein the first heat exchanger 4 is designed as an evaporator and the second heat exchanger 10 as a condenser, and wherein the first heat exchanger 4 is arranged upstream of the second heat exchanger 10 in the flow direction of the process air 16. The flow direction of the process air 16 in the heat exchanger device 2 is in the Fig. 3 is symbolized by an arrow 20. The two heat exchangers 4, 10 are each designed as a finned heat exchanger, wherein a fin pack with a plurality of fins is arranged between the respective corresponding side plates 6, 8 and 12, 14 in a manner known to those skilled in the art. However, the invention is also advantageously applicable to other embodiments of the heat exchanger device according to the invention with other types of heat exchangers.

[0023] According to the invention, the corresponding first and second side plates 6, 12 and 8, 14 are arranged in a Fig. 4 shows the pre-assembly state of the heat exchanger device 2 unconnected and for the purpose of transferring the heat exchanger device 2 into, for example, a Fig. The heat exchanger device 2, as shown in Figure 3, can be connected to each other by means of a mounting plate 22, 24, wherein each mounting plate 22, 24 has a lower thermal conductivity compared to the first and second side plates 6, 12 and 8, 14. In the present embodiment, the thermal conductivity of each of the two mounting plates 22, 24 is at least 100 times lower, namely at least 200 times lower, namely at least 1000 times lower, than the thermal conductivity of the first and second side plates 6, 12 and 8, 14.

[0024] For this purpose, the first and second side plates 6, 12 and 8, 14 are each made of a metal, namely steel or aluminium, and the two mounting plates 22, 24 are each made of a plastic, namely polypropylene or polyethylene.

[0025] Both mounting plates 22, 24 are each designed as a molded plate, with each molded plate being shaped as an angled plate, such that both mounting plates 22, 24 are designed as matching molded plates. The two mounting plates 22, 24 are designed to match each other in such a way that no further component is required for the angled formation of the heat exchanger device 2, which is angled in its assembled state.

[0026] Specifically, relative to the respective corresponding side plates 6, 12 and 8, 14, one mounting plate 22 is arranged internally and the other mounting plate 24 externally, with the heat exchanger device 2 being located in its Fig. In the assembly state shown in Figure 3, an angle is formed in a top view of the heat exchanger device 2, wherein, on the one hand, the mounting plate 24, arranged on an outside of the heat exchanger device 2 with respect to the aforementioned angle, is located on the outside in the aforementioned top view relative to the two corresponding side plates 8, 14, and, on the other hand, the mounting plate 22, arranged on the inside of the heat exchanger device 2 with respect to the aforementioned angle, is located on the inside in the aforementioned top view relative to the two corresponding side plates 6, 12. Fig. Figure 3 shows the inner mounting plate 22 on the inside in the image plane below and the outer mounting plate 24 on the outside in the image plane above.

[0027] As already explained above, in the present embodiment, the heat exchanger device 2 is designed as part of the heat pump 18. Accordingly, the heat exchanger device 2 here has a filter drier 26 with capillaries, wherein the filter drier 26 of the heat exchanger device 2, with respect to the aforementioned angle, is arranged in the top view on the inside of the heat exchanger device 2, namely such that the filter drier 26 is arranged on the mounting plate 22 associated with this inside, wherein a holder 28 for the filter drier 26 is formed on the aforementioned mounting plate 22.

[0028] In the present embodiment, at least one of the two mounting plates 22, 24 is designed and arranged to fit at least one of the two heat exchangers 4, 10 such that, in the assembled state of the heat exchanger device 2, this mounting plate substantially closes a gap (not shown) between the corresponding first and / or second side plate and a portion of the aforementioned heat exchanger. For example, this closes a larger gap, caused during the manufacturing process of the heat exchanger device 2 and exceeding the usual fin spacing between individual fins, between a fin directly adjacent to the aforementioned side plate, namely by extending this mounting plate up to the respective fin stack of the aforementioned heat exchanger.

[0029] The mounting plate 22 associated with the aforementioned inner side of the heat exchanger device 2 is connected here by means of a screw connection to the corresponding first and second side plate 6, 12, wherein screw means of the aforementioned screw connection associated with this mounting plate 22 and designed as screw bolts are formed on this mounting plate 22 and screw means of the aforementioned screw connection associated with the corresponding first and second side plate 6, 12 and designed as screw holes are formed on this first and second side plate 6, 12.The mounting plate 24 associated with the aforementioned outer surface of the heat exchanger device 2 is connected here to the corresponding first and second side plates 8, 14 by means of a snap-fit ​​connection, wherein locking elements of the aforementioned snap-fit ​​connection, which are designed as locking pins and are associated with this mounting plate 24, and locking elements of the aforementioned snap-fit ​​connection, which are designed as locking holes and are associated with the corresponding first and second side plates 8, 14, are formed on these first and second side plates 8, 14. See the [reference to be added]. Fig. 3, Fig. 4 to Fig. 5 in a summary, whereby in the Fig. 4. Only one side plate and both mounting plates are shown as examples only and in comparison to the Fig. 3 are shown in a partially enlarged view. The same applies to the ones in the Fig. The 4 side plates 6, 8 and 14, which are not explicitly shown, are not included. The additional nuts required for the aforementioned screw connection are not shown.

[0030] As can be seen in particular from the Fig. As can be seen in Figure 3, the two heat exchangers 4, 10 are essentially only connected to each other by means of the two mounting plates 22, 24 in a force-transmitting manner, so that the two heat exchangers 4, 10 are connected to each other indirectly, namely by means of the mounting plates 22, 24, in a force-transmitting manner.

[0031] In contrast, one in the Fig. 6 and Fig. Figure 7 illustrates a variant of the present embodiment in which the two heat exchangers 4, 10 are connected to each other at both of the aforementioned free ends of the two heat exchangers 4, 10, on the one hand indirectly by means of the corresponding mounting plate 22, 24 and on the other hand directly by means of the corresponding first and second side plates 6, 12 and 8, 14, wherein these first and second side plates 6, 12 and 8, 14 each have a U-shaped cutout with a base and two legs for the aforementioned direct connection, and wherein these first and second side plates 6, 12 and 8, 14 are essentially connected to each other directly only by means of the two legs of the aforementioned U-shaped cutouts.

[0032] However, it is also conceivable that in another embodiment of the invention a combination of the two aforementioned variants of the force-transmitting connection between the two heat exchangers of the heat exchanger device according to the invention is provided. Accordingly, the two heat exchangers on one side of the heat exchanger device according to the invention would only be indirectly connected to each other in a force-transmitting manner, while on the other side of the heat exchanger device according to the invention they would be connected to each other both directly and indirectly.

[0033] Furthermore, in the present embodiment, the first and second side plates 6, 12 and 8, 14 are designed and arranged in such a way that the first and second side plates 6, 12 and 8, 14 together with the two mounting plates 22, 24 form a substantially laterally closed flow channel for the process air 16.

[0034] In an operating state of the heat exchanger device 2, it is arranged in a manner known to those skilled in the art in a housing part (not shown) of a base module of the laundry treatment machine 1. The base module here comprises at least the aforementioned housing part and the heat exchanger device 2, with the first heat exchanger 4 and the second heat exchanger 10, which is received in this housing part in its operating state, wherein the two heat exchangers 4, 10 are arranged along the flow path 20 of the process air 16 according to the Fig.3. In the operating state of the heat exchanger device 2, the components are arranged sequentially in the aforementioned housing part and connected to one another by means of the mounting plates 22, 24, wherein the housing part can be designed as a base part, a cover part, or an insert part of the base module. A further seal of the heat exchanger device 2 is enabled by means of a suitable design of the aforementioned housing part and / or a portion of the base part to effectively prevent an unwanted bypass flow of the process air 16.

[0035] Due to the inventive design of the heat exchanger device 2, unwanted heat conduction between the two heat exchangers 4, 10 of the heat exchanger device 2 is effectively prevented, or at least significantly reduced, by means of the first and second side plates 6, 12 and 8, 14. Accordingly, the energy efficiency of the laundry treatment machine 1 equipped with the heat exchanger device 2 is significantly improved in a very simple manner from a design and manufacturing perspective. Furthermore, this is possible without having to abandon the desirable space-saving arrangement of the two heat exchangers 4, 10 of the heat exchanger device 2, i.e., the spatial arrangement of the two heat exchangers 4, 10 relative to each other. Thus, the heat exchanger device 2 can be designed to be both compact and very energy-efficient.Since the heat exchanger device 2 is designed as a single unit in its assembled state, it can be handled as a whole during the manufacture of the laundry treatment device 1 equipped with it. Furthermore, due to its design as a single unit, the two heat exchangers 4 and 10 of the heat exchanger device 2 are properly aligned with each other, thus ensuring the flawless functioning of the heat exchanger device 2 in this respect.

[0036] However, the invention is not limited to the present embodiment. The laundry treatment machine according to the invention can also be designed as a commercial appliance, i.e., an appliance for professional use. Furthermore, the laundry treatment machine according to the invention can also be a washer-dryer, i.e., a combination appliance consisting of a washing machine and a tumble dryer, or a laundry care cabinet. An insert of the base module can, for example, be designed as a sealant to effectively prevent, or at least reduce, unwanted bypass flow of the process air in the edge regions of the two heat exchangers of the heat exchanger device according to the invention. It should also be noted that the term "base module" refers to the functional unit for generating the process air; it is not limited to its local arrangement in the base of the appliance.For example, the unit with the heat exchangers can also be located in the area below the cover or on the cover of the device. This applies to all the aforementioned designs.

[0037] In particular, the invention is not limited to the constructive and manufacturing embodiments of the described embodiment.

[0038] In principle, embodiments of the heat exchanger device according to the invention are also possible in which a first section of the flow path through the first heat exchanger and a second section of the flow path through the second heat exchanger are arranged essentially in a straight line to each other, even in the operating state of the heat exchanger device. Accordingly, the two heat exchangers of this heat exchanger device would not be arranged at an angle to each other in their assembled state.

Claims

[1] Heat exchanger device (2) for a laundry treatment machine (1), comprising a first heat exchanger (4) with two first side plates (6, 8) and a second heat exchanger (10) with two second side plates (12, 14), wherein the respective side plates (6, 8 and 12, 14) are arranged opposite each other at each free end of the corresponding heat exchanger (4, 10), and wherein the two heat exchangers (4, 10) are arranged one after the other along a flow path (20) of process air (16) of the laundry treatment machine (1) in an operating state of the heat exchanger device (2) and are connected to each other at both of the aforementioned free ends by means of the corresponding first and second side plates (6, 12 and 8, 14) to form a unit, characterized by, that the corresponding first and second side plates (6, 12 and 8, 14) are unconnected in a pre-assembly state of the heat exchanger device (2) and can each be connected to each other by means of a mounting plate (22, 24) in order to transfer the heat exchanger device (2) into an assembly state of the heat exchanger device (2), wherein the respective mounting plate (22, 24) has a lower coefficient of thermal conductivity compared to the first and second side plates (6, 12 and 8, 14). [2] Heat exchanger device (2) according to claim 1, characterized by , that the thermal conductivity of each of the two mounting plates (22, 24) is at least by a factor of 100, preferably at least by a factor of 200, particularly preferably at least by a factor of 1000 less than the thermal conductivity of the first and second side plates (6, 12 and 8, 14). [3] Heat exchanger device (2) according to claim 1 or 2, characterized by, that at least one of the two mounting plates (22, 24) is designed as a mold plate, wherein the mold plate is designed as an angle plate, preferably that both mounting plates (22, 24) are each designed as a mold plate, particularly preferably that both mounting plates (22, 24) are designed as matching mold plates. [4] Heat exchanger device (2) according to one of claims 1 to 3, characterized by, that, relative to the respective corresponding side plates (6, 12 and 8, 14), one mounting plate (22) is arranged internally and / or the other mounting plate (24) is arranged externally, preferably that the heat exchanger device (2) in its assembled state forms an angle in a top view of the heat exchanger device (2), wherein, on the one hand, the mounting plate (24) arranged on an outside of the heat exchanger device (2) with respect to the aforementioned angle is arranged internally or externally in the aforementioned top view relative to the two corresponding side plates (8, 14), and on the other hand, the mounting plate (22) arranged on the inside of the heat exchanger device (2) with respect to the aforementioned angle is arranged internally in the aforementioned top view relative to the two corresponding side plates (6, 12). [5] Heat exchanger device (2) according to claim 4, characterized by, that a filter drier (26) of the heat exchanger device (2), with respect to the aforementioned angle, is arranged in the top view on the inside of the heat exchanger device (2), preferably that the filter drier (26) is arranged on the mounting plate (22) associated with this inside, particularly preferably that a holder for the filter drier (26) is formed on the aforementioned mounting plate (22). [6] Heat exchanger device (2) according to any one of claims 1 to 5, characterized by , that at least one of the two mounting plates (22, 24) is designed and arranged in such a way as to be adapted to at least one of the two heat exchangers (4, 10) that this mounting plate, in the assembly state of the heat exchanger device (2), substantially closes a gap between the corresponding first and / or second side plate and a remainder of the aforementioned heat exchanger. [7] Heat exchanger device (2) according to any one of claims 1 to 6, characterized by , that at least one of the two mounting plates (22, 24) is connected to the corresponding first and second side plate (6, 12 and 8, 14) by means of a screw connection and / or by means of a snap connection, preferably that screw means and / or snap means of the aforementioned screw connection and / or snap connection associated with this mounting plate (22, 24) are formed on this mounting plate (22, 24) and / or screw means and / or snap means of the aforementioned screw connection and / or snap connection associated with the corresponding first and second side plate (6, 12 and 8, 14) on this first and second side plate (6, 12 and 8, 14). [8] Heat exchanger device (2) according to any one of claims 1 to 7, characterized by, that at least the first and / or the second side plates (6, 8, 12, 14) are made of a metal, preferably steel or aluminium, and / or that at least one of the two mounting plates (22, 24) is made of a plastic, preferably polypropylene or polyethylene. [9] Heat exchanger device (2) according to any one of claims 1 to 8, characterized by , that the two heat exchangers (4, 10) are essentially only connected to each other by means of the two mounting plates (22, 24) in a force-transmitting manner. [10] Heat exchanger device (2) according to any one of claims 1 to 8, characterized by, that the two heat exchangers (4, 10) are connected to each other at at least one of the aforementioned free ends of the two heat exchangers (4, 10) on the one hand indirectly by means of the corresponding mounting plate (22, 24) and on the other hand directly by means of the corresponding first and second side plates (6, 12 and 8, 14), preferably that these first and second side plates (6, 12 and 8, 14) each have a U-shaped cutout with a base and two legs for the aforementioned direct connection, wherein these first and second side plates (6, 12 and 8, 14) are essentially connected to each other directly only by means of the two legs of the aforementioned U-shaped cutouts. [11] Heat exchanger device (2) according to any one of claims 1 to 10, characterized by, that the first and second side plates (6, 12 and 8, 14) are designed and arranged in such a way as to form a substantially laterally closed flow channel for the process air (16) together with the two mounting plates (22, 24). [12] Heat exchanger device (2) according to any one of claims 1 to 11, characterized by , that the heat exchanger device (2) is designed as part of a heat pump (18), wherein the first heat exchanger (4) is designed as an evaporator and the second heat exchanger (10) is designed as a condenser, preferably that the first heat exchanger (4) is arranged in the flow direction (20) of the process air (16) upstream of the second heat exchanger (10).

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