Electrical appliance having a component carrier for electrical or electronic components

Abstract

An electrical appliance in the form of a washing machine has a component carrier for electrical or electronic components, wherein the washing machine has a housing and the component carrier is arranged therein. The housing has holding means with which the component carrier is arranged in the housing. Some of the holding means are formed by flexible and elastic holding material which is variable in volume or compressible. It also has increased thermal conductivity due to the addition of graphite. Furthermore, the holding material has vibration-damping properties and a hardness between 10 Shore A and 60 Shore A. The vibration-damping properties can be matched to the main frequencies which arise during operation of the washing machine, in order in this way to protect the components on the component carrier.

Description

[0001] Electrical device with a component carrier for electrical or electronic components

[0002] SCOPE OF APPLICATION AND STATE OF THE ART

[0003] The invention relates to an electrical appliance with a component carrier for electrical and / or electronic components, in particular a water-bearing household appliance such as a washing machine, dishwasher or tumble dryer, or a cooking appliance. Electrical and / or electronic components can be arranged on such a component carrier, often also called a printed circuit board or circuit board, which serve for signal processing, power supply or conversion of power or voltage, or for similar tasks in the electrical appliance.

[0004] TASK AND SOLUTION

[0005] The invention is based on the objective of creating an electrical device as described above, with which problems of the prior art can be solved and, in particular, it is possible to design the construction of such an electrical device in a relatively simple and practical way, so that it can be used reliably and preferably vibrations cannot cause any significant damage.

[0006] This problem is solved by an electrical device with the features of claim 1. Advantageous and preferred embodiments of the invention are the subject of further claims and are explained in more detail below. The wording of the claims is incorporated by express reference into the description.

[0007] The electrical device has a component carrier for electrical and / or electronic components, in particular a printed circuit board (PCB). The electrical device also has a housing, in particular an outer housing, and the component carrier is arranged inside this housing. The housing has retaining means such that the component carrier is arranged in the housing by these retaining means and is thereby both secured or held in a specific position and may also be received or at least partially surrounded by the retaining means. The retaining means may have individual parts such as clips, projections, or the like. Alternatively and advantageously, the retaining means are designed to be flat or extended in such a way that they bear at least partially flat against the component carrier, in particular in an edge region or outer area as well as in a central region surrounded thereby.

[0008] According to the invention, at least part of the holding elements is formed by a flexible and elastic holding material, wherein this holding material is volume-variable or compressible, thereby enabling the compensation of vibrations. This protects the component carrier and, in particular, the electrical or electronic components from vibrations. These vibrations could negatively affect the service life of both the components themselves and their electrical connection to the component carrier or the printed circuit board. For example, they could damage solder joints and thus negatively impair or completely destroy and interrupt electrical connections.

[0009] In an advantageous embodiment of the invention, the component carrier is arranged in direct contact with the holding means in the housing, such that the component carrier rests at least partially directly against the holding means. This can advantageously be at least in an edge region of the component carrier, and particularly advantageously at least partially in a central region. The component carrier can rest at least partially flat on the holding means with its underside or on an upper surface of the holding means. Additionally or alternatively, the component carrier can be held laterally or in a lateral direction by the holding means with a positive fit in one direction along its surface, advantageously either by the holding means being pressed laterally against the component carrier or by an edge region of the component carrier being in a slot in the holding means.

[0010] In a particularly advantageous embodiment of the invention, the component carrier is pressed against the holding means in such a way that the holding material is compressed by at least 2% in volume, preferably by 20% to 50%. This should be compared to an unloaded initial state of the holding material. This allows the component carrier to be held more securely and firmly, and in such a way that it is virtually firmly embedded in or held by the holding material. Movements of the component carrier are then only possible to the extent permitted by the holding material.

[0011] In an alternative embodiment of the invention, the component carrier can be arranged in the housing without direct contact with the holding elements, with the electrical device having a separate mounting bracket for the component carrier. Advantageously, the mounting bracket is a separate component, for example, approximately shell-shaped, and somewhat larger than the component carrier. The component carrier can be held directly in the mounting bracket, which in turn is attached to the holding elements made of holding material. Preferably, the component carrier is held firmly and immovably in the mounting bracket. The mounting bracket can be pressed against the holding elements, similar to the above description, such that the holding material is compressed by at least 2% in volume compared to an unloaded initial state, preferably by 20% to 50%.The mounting bracket can therefore be clamped or held in the holding material with a similar degree of strength as described in the other design for the component carrier. In this way, the mounting bracket can be protected from vibrations by the holding material, or these vibrations can be dampened, and consequently, so can the component carrier mounted on or within it. Advantageously, such a mounting bracket can be made of a rigid material, for example, plastic or metal, in the latter case possibly in conjunction with electrical insulation. It can be shell-shaped and have a larger surface area than the component carrier itself, thus projecting beyond it on at least one side, and preferably on all sides. The component carrier can be held on and in the mounting bracket by means of a raised, circumferential edge or, alternatively, raised retaining tabs or the like.The term "plastic" here also includes rubber, both natural rubber and synthetic rubber.

[0012] In a further development of the invention, the holding material can have a thermal conductivity between 1 W / (m*K) and 150 W / (m*K), preferably between 5 W / (m*K) and 100 W / (m*K). This can also apply to the previously described mounting bracket, if one is to be provided. Thus, these materials can serve to dissipate heat from components to the mounting bracket and therefore also from the mounting bracket itself, so that excessive and potentially harmful heat concentrations do not occur. For this purpose, it is preferred if the mounting bracket has at least partial surface contact with the holding material or the mounting bracket to ensure good heat transfer. To improve its thermal conductivity, the holding material can be made thermally conductive by adding graphite and / or carbon, or its conductivity can be increased, for example, up to the aforementioned thermal conductivity.

[0013] In a further embodiment of the invention, the retaining material can have at least one continuous recess, preferably running from top to bottom, wherein the recess is advantageously completely surrounded laterally by the retaining material, so that the retaining material can form a kind of frame around the recess. A thermally conductive material is arranged in the recess, which can rest on the housing. The thermally conductive material has a thermal conductivity that is greater than that of the retaining material, advantageously at least 20% or at least 50% greater. This thermal conductivity can be between 10 W / (m*K) and 250 W / (m*K), preferably between 25 W / (m*K) and 160 W / (m*K). Components on the component carrier, the component carrier itself, or a aforementioned mounting bracket on which the component carrier is arranged can be directly connected to or in contact with the thermally conductive material in a heat-transferring manner.They can therefore dissipate their heat to the thermal interface material, which can then transfer the heat to the housing and ultimately dissipate it, thus providing additional cooling to the components and protecting them from overheating. This enables a combination of the mechanically secure mounting provided by the mounting material with improved heat dissipation through the thermal interface material.

[0014] Regarding the vibration-damping properties of the mounting material, it should have a hardness between 5 Shore A and 90 Shore A, preferably between 10 Shore A and 50 Shore A or 60 Shore A. The mounting material can be solid and closed, or it can be porous, foamed, or a type of foam. This will be explained in more detail below.

[0015] In an embodiment of the invention, the holding material for vibration suppression can have a band gap in its vibration spectrum, such that this corresponds to particularly strong vibration damping of a frequency that occurs predominantly during the operation of the electrical appliance. Thus, the holding material is especially effective at suppressing vibrations at this frequency. Such a predominantly occurring frequency can, for example, arise when a washing machine, as an electrical appliance, has a maximum spin speed of 1200 rpm, and at this maximum spin speed and with a typical load of laundry, a specific frequency results relatively precisely and concretely with a large proportion. This can then be, on the one hand, a predominantly or most frequently occurring frequency.Secondly, vibrations can occur here particularly strongly or even at their maximum intensity, so the component carrier and the components on it can be specially protected against this. The predominant frequency can occur during at least 30% of the average operating time of the electrical device, or alternatively, it can correspond to the maximum vibration occurring during average operation of the electrical device. The specified band gap can have a width of 10 Hz to 200 Hz, preferably 30 Hz to 70 Hz.

[0016] In a further embodiment of the invention, the holding material and / or the aforementioned mounting bracket can be electrically insulating, preferably consisting of electrically insulating material and having a layer thereof on its upper surface. This prevents short circuits or insulation problems in general at the component carrier. Advantageously, the mounting bracket can be made of plastic, particularly electrically insulating plastic.

[0017] Advantageously, the mounting material and / or the aforementioned mounting bracket can be designed to be waterproof. This can be particularly beneficial if the electrical appliance is a water-using appliance or household appliance, such as a washing machine or dishwasher. By positioning the component carrier on and within it, it and its components can be protected from water.

[0018] As an alternative to a design made of plastic, rubber, or plastic foam, the holding material can be a metal foam, for example, containing or consisting primarily of aluminum or zinc. One example is a metal foam called FOAMINAL, developed by the Fraunhofer Institute. The advantageous properties of metal foams include high stiffness per unit weight, efficient energy absorption, increased vibration damping, reduced thermal and electrical conductivity compared to solid metal, and a wide operating temperature range. Furthermore, metal foams are non-flammable, easy to process, and can be fastened and joined by gluing, screwing, welding, and possibly soldering. They are also readily recyclable.Such metal foam can also exhibit vibration-damping properties, and, more importantly, it is very effective at dissipating heat from the component substrate. A metal foam can have a foam density of approximately 0.5 g / cm³. 3 and 1.0 g / cm³ 3 It may exhibit a modulus of elasticity between 3 GPa and 9 GPa. This modulus is preferably dynamic. It may be frequency-dependent and reach its maximum at a frequency at which the strongest vibrations occur during average operation of the electrical device. These frequencies are preferably those mentioned above.

[0019] As a further alternative, the mounting material can be a so-called metamaterial, preferably a vibroacoustic metamaterial or a metamaterial whose effective thermal conductivity and / or modulus of elasticity are variable. Such metamaterials or vibroacoustic materials can reduce the amplitudes of oscillations and vibrations, as well as noise, to a degree and across a broad spectrum that is not achievable with conventional vibration absorbers or rubber dampers. Vibroacoustic materials can be applied as individual small blocks or components in a regular arrangement to a component or substrate to be influenced. The individual blocks or components are tuned to a specific natural frequency and positioned at intervals greater than half a wavelength of the natural frequency to be influenced.In this frequency range, so-called stopbands are created in the transfer function, i.e., areas in which wave propagation is not possible at this frequency.

[0020] In a further development of the invention, it can be provided that the elastic properties of the holding material change over the course of the operation of the electrical appliance, for example, such that maximum damping can be achieved in a different frequency range at the beginning of operation than during later stages of operation or towards the end of operation, for example, when a washing machine is spinning at the highest possible speed. In this way, vibrations that occur at different times during the operation of the electrical appliance can be reduced to the maximum extent possible in a time-adapted manner.

[0021] Another possibility is that the elastic properties of the holding material can change depending on external vibrations, particularly those resulting from the operation of the electrical device. If the vibrations increase, the holding material can become more elastic to counteract them directly.

[0022] Another possibility is that the elastic properties of the holding material can change depending on the temperature of the component carrier or individual components on it. In this case, the component carrier or individual components on it, where a particularly high temperature increase is expected during typical operation, for example in the case of power semiconductors, can be thermally coupled to the holding material in order to heat it accordingly.

[0023] Another possibility is that the elastic properties of the mounting material can change depending on the humidity level in or near the electrical device. This also allows for adaptation to specific operating conditions of the electrical device.

[0024] In a further development of the invention, a folded flat material can be provided as an alternative to a solid or foamed holding material. In particular, it can have a regular shape deformed by folding. The flat material can be folded in such a way that its height is a multiple of its thickness. This can be a so-called origami material.

[0025] Another approach to reducing vibrations involves modifying the elastic properties of the mounting material in response to the control system of the electrical appliance. In the case of the aforementioned washing machine, this modification can be dependent on the spin cycle. The appliance's control system knows the rotational speeds of an upcoming spin cycle and may have stored data indicating the frequency range in which vibrations are likely to occur. The mounting material can then be adjusted to dampen vibrations as effectively as possible within this frequency range. Advantageously, the mounting material, which can be flat and plate-like, can be designed to make essentially full contact with the mounting material on one of its two sides, preferably its underside.It is particularly advantageous for the side of the component carrier with fewer and / or smaller components than the other side to be in full contact with the mounting material. This makes it possible to reduce the amount of copper used as a component carrier on a printed circuit board. Semiconductors, in particular, should be thermally decoupled or located in an area where thermal contact with the mounting material occurs. One advantage of this is the potential for a modular design, and another is that the materials can be recycled more easily.

[0026] Alternatively, the holding material can have a previously described or continuous recess containing at least a partial or large area of ​​thermally conductive material, which can advantageously also rest on the housing. The thermally conductive material has a higher thermal conductivity than that of the holding material, preferably at least twice as high. The thermally conductive material can directly contact the underside of the component carrier and thus efficiently conduct heat directly from the component carrier or a component arranged on top of it to the housing, thereby dissipating it.

[0027] In one embodiment of the invention, the holding means can be designed in a trough-like form with a base and surrounding side walls or with lateral supports on the sides. The base of the holding means can be formed over the entire surface, which is particularly useful for the thermal connection described above.

[0028] In a further embodiment of the invention, the aforementioned mounting bracket can also be designed in a trough-like form with a base and surrounding side walls or with lateral supports on the sides. In particular, such a mounting bracket should be fully connected to the mounting material, especially on an underside or outer side and preferably also on lateral sides, particularly for thermal connection or cooling.

[0029] In an advantageous embodiment of the invention, the lower part of the housing, or the housing base, is completely covered with the retaining elements or material. Additionally, the retaining material can also extend along the sides of the housing, particularly continuously. For example, waterproof retaining material can protect the component carrier from moisture in a water-bearing electrical device. Furthermore, it is also possible, alternatively with the aforementioned trough-like design of the retaining material, for it to project upwards above the component carrier. This, too, can provide protection against moisture.

[0030] Preferably, the electrical appliance is a water-bearing household appliance, in particular a washing machine, a washer-dryer, or a dishwasher. Especially in the case of a washing machine, the component carrier can be located in or on a pull-out drawer positioned in the lower or very bottom section. Other components of the washing machine, such as a pump, filter, etc., can also be arranged on such a drawer.

[0031] These and other features are evident not only from the claims but also from the description and the drawings, whereby the individual features, either alone or in combination, may be implemented in one embodiment of the invention and in other fields, and may represent advantageous and individually protectable embodiments for which protection is claimed here. The division of the application into individual sections and subheadings does not limit the general validity of the statements made therein.

[0032] BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Further advantages and aspects of the invention will become apparent from the claims and from the description of exemplary embodiments of the invention, which are explained below with reference to the figures. These figures show:

[0034] Fig. 1 shows a schematic representation of a washing machine as an electrical appliance according to the invention, with a drawer for components in the lower area of ​​a housing, wherein electronics are arranged here.

[0035] Fig. 2 shows a strong magnification of a holding housing in the drawer according to Fig.

[0036] 1, in which holding material according to the invention and embedded therein a component carrier for the electronics are arranged,

[0037] Fig. 3 shows a modification of the holding housing from Fig. 2, wherein the component carrier is received in a mounting bracket and is thus embedded in the holding material.

[0038] Fig. 4 shows a top view of the retaining material from Figs. 2 and 3 with a recess and thermally conductive material therein, and

[0039] Fig. 5 shows an enlargement of a structure according to the invention for the holding material, which is formed in the manner of an origami fold. DETAILED DESCRIPTION OF THE EXAMPLES OF EXECUTION

[0040] Figure 1 shows a simplified representation of a washing machine 11 according to the invention as an electrical appliance; reference is also made to EP 4 086 383 A1. The washing machine 11 has a water inlet WE and a water outlet WA, each equipped with a valve V1 and V2, respectively. A drum 14 is arranged in the housing 12 in a known manner and has a drum drive 15. This drive can be configured as a direct drive or as a BLDC motor.

[0041] In the lower part of the washing machine 11, or in the housing 12, a pump 17 is arranged via a further valve V3 and a filter. This pump can advantageously be designed according to EP 3 008 346 A1. It can therefore be an impeller pump and have an integrated heating device for heating the water pumped through it.

[0042] In the lower part of the housing 12 of the washing machine 11, a drawer 24, shown in dashed lines, is provided in accordance with the aforementioned EP 4 086 383 A1. This drawer can be at least partially or largely pulled out by means of a handle 25 on the front. It may be provided that all functional units, i.e., from the valve V3 onwards, can be arranged in this drawer 24 below or behind the drum 14. Further disclosures in this regard are referenced in PCT / EP2023 / 065126 and DE 10 2023 130 143 A1.

[0043] In particular, the pull-out drawer 24 contains a heating control 19 for the heating element integrated in the pump 17, an inverter 20, and a device control unit 21. The inverter 20 is designed for the drum drive 15 and its BLDC motor.

[0044] Due to the arrangement of the electronics—specifically the heating control 19, inverter 20, and device control 21—in drawer 14, and more generally due to their arrangement within the housing 12, these electronics are exposed to vibrations generated primarily by the drum drive 15, but also by the drum 14 itself and the pump 17. As explained earlier, such vibrations can, generally and especially over time, negatively affect, damage, or even destroy electronic circuits and / or components. The electronics should be protected from excessive vibrations to prevent problems, the need for repairs, or complete failure of the washing machine 11.

[0045] As shown in Fig. 2, a first embodiment of the invention provides a relatively simple solution: a retaining housing 27 which can be closed at the top by means of a cover 29. This closure serves primarily to protect the interior from moisture or the ingress of water. The cover 29 can therefore also be elastic.

[0046] A mat-shaped retaining material 31 is arranged in the retaining housing 27, which is placed on and advantageously attached to the bottom of the drawer 24. As shown here, it can rest fully on the top surface of the drawer bottom 24; the retaining housing 27 thus acts as a kind of frame. The retaining material 31 extends upwards along its outer edge and has a retaining rim 31'. This allows an inserted component carrier 35 to be held more securely and, in particular, dampened against lateral vibrations. The height of the retaining rim 31 can range from a few millimeters to several centimeters, for example, between 2 mm and 20 mm above the flat retaining material 31.

[0047] As shown in the top view of Fig. 4, the retaining material 31 has a rectangular recess 32. This recess is a rectangular hole and contains, in part, thermally conductive material 33 with a higher thermal conductivity, as described above. According to the top view in Fig. 4, it fills only slightly more than a quarter of the recess 32. It should only be provided where very high thermal conductivity from top to bottom towards the base of the drawer 24 is actually desired. However, the thermally conductive material 33 can also cover a larger area and, in particular, completely fill the recess, extending laterally and / or upwards and downwards.

[0048] As shown in Fig. 2, the component carrier 35 with components 36 mounted on it is arranged on the holding material 31, or rather, clamped between its edges 3T. This holds the component carrier 35 firmly in position and protects it from vibrations. The thermal conductivity material 33 can be arranged under components 36 that generate particularly high heat during operation. Advantageously, as an alternative to the specific illustration in Fig. 2, it can be made taller (shown as dashed line) and directly contact the underside of the component carrier 35 for improved heat conduction. This is achieved if the holding material 31 is compressed somewhat more by the component carrier 35, or if the thermal conductivity material 33' (shown as dashed line) is made somewhat taller or thicker.The conductive material 33', shown with dashed lines, thus directly contacts the underside of the component carrier 35, advantageously directly beneath a component 36 that becomes, or can become, particularly hot during operation. The components 36 can advantageously be power semiconductors, such as those for the aforementioned converter 20, or even the heating control 19. The free volume within the recess 32 next to the thermal conductive material 33 allows for rear ventilation and thus also slight cooling of the component carrier 35 or of components on it. Of course, it is also obviously possible for components on the component carrier 35 that become very hot during operation to be arranged on the underside of the component carrier 35 and to be directly connected to, or in contact with, the bottom of the drawer 24 or the thermal conductive material 33 in a heat-transferring manner.Thermal pastes and similar materials, as are known in the first place, can also be used, which may be advantageous in preventing the transmission of vibrations.

[0049] The retaining material 31 is designed to be particularly effective at the frequencies and vibrations that occur during the operation of the washing machine 11 and that are strong enough to negatively affect the operation and durability of the washing machine, and especially of the components 36, in the long term. These frequencies can be determined by simulation or, alternatively, by appropriate practical tests with a specific model of such a washing machine. For this purpose, the retaining material 31 can, for example, have a relatively low Shore A hardness, advantageously between 10 Shore A and 45 Shore A, and particularly advantageously around 40 Shore A. It can be made of plastic. Alternatively, it could also be a metal foam as mentioned above or a metamaterial as mentioned above, for example, a vibroacoustic metamaterial. With such a metamaterial, the thermal conductivity can also be influenced.In the aforementioned embodiment, the thermally conductive material 33 is provided in the recess 32 in the retaining material 31 for this purpose. The thickness of the retaining material 31 can be 2 mm to 5 mm, even at the outer edge 3T. An electrical connection to, for example, a heater of the pump 17 or the drum drive 15 can be made using plugs and cables that can compensate for movements and do not transmit vibrations. These should be long enough or easily detachable so that the drawer 24 can actually be pulled out to a practical and advantageous extent. The retaining material 31 can also be a woven fabric or a nonwoven material, for example, made of carbon, glass fibers, or other materials.The thermal conductive material 33 in the recess 32 can also be commonly used conductive material, for example TIM material such as phase-change material, graphite and aluminum foils, foam and gel films, single-sided and double-sided adhesive thermal conductive films, silicone-containing and silicone-free elastomers, Kapton and mica discs, aluminum oxide materials.

[0050] As can be seen in Fig. 2, the component carrier 35 should only come into contact with, or be held by, the retaining material 31 or its edge 3T. A thermally conductive coupling to the conductive material 33 can be elastic or flexible, using the aforementioned thermal paste or other materials, to avoid a rigid mechanical connection that could have a negative impact. Alternatively, instead of foam material, the retaining material 131 shown in Fig. 5 can also be made from a flat material by folding, i.e., as a kind of origami material with a regular shape or fold. The retaining material 131 has regularly formed protrusions and depressions. Thin metal sheets are suitable for this purpose, as are thin plastic material or fiber-reinforced plastic, which is formed into such a shape and then used accordingly.The origami material could be stacked on top of each other in several layers or connected together, or alternatively as a single layer.

[0051] A second embodiment of the invention, as a modification of Fig. 2, is shown in Fig. 3. The retaining housing 27 with cover 29 and retaining material 31, including the retaining rim 3T, is designed as in Fig. 2. The recess 32 in which thermally conductive material 33 is arranged is also provided. As a modification, a mounting bracket 140 is arranged in the retaining material 31 or 3T according to this second embodiment. This mounting bracket 140 is trough-shaped with a circumferential rim 140' and is preferably closed at the bottom. In the mounting bracket 140, a component carrier 135 according to the invention is arranged with components (not shown) that are arranged at least on its upper surface and optionally also on its lower surface.It may be provided that the component carrier 135 is permanently fixed to the mounting bracket 140, for example by bonding, also for reasons of component safety, mechanical stability and moisture resistance. Furthermore, the mounting bracket 140 can also be made of a material that, especially in conjunction with the retaining material 31 below it, interacts so effectively that it additionally helps to reduce or even prevent harmful vibrations at the component carrier 135. The main purpose here, however, is to protect the mounting bracket 140 from vibrations, and thus also the component carrier 135 within it.

Claims

Patent claims 1. Electrical device with a component carrier for electrical and / or electronic components, wherein: the electrical device has a housing and the component carrier is arranged inside the housing, the housing has retaining means and the component carrier with the retaining means is arranged in the housing, characterized in that at least a part of the retaining means is formed by flexible and elastic retaining material, wherein the retaining material is volume-variable or compressible.

2. Electrical device according to claim 1, characterized in that the component carrier is arranged in direct contact with the holding means in the housing, wherein in particular the component carrier rests flatly on the holding means or on a top side of the holding means with a bottom side and / or the component carrier is held laterally by the holding means with positive locking in the direction of a surface of the component carrier.

3. Electrical device according to claim 2, characterized in that the mounting support is pressed against the holding means in such a way that the holding material of the holding means is compressed by at least 2% in volume compared to an unloaded initial state, preferably by 20% to 50%.

4. Electrical device according to claim 1, characterized in that the component carrier is arranged in the housing without direct contact with the holding means, wherein the electrical device has a mounting bracket for the component carrier, wherein the component carrier is held directly in the mounting bracket, wherein the mounting bracket is attached to the holding means and is pressed against the holding means in such a way that the holding material of the holding means is compressed by at least 2% in volume compared to an unloaded initial state, in particular by 20% to 50%.

5. Electrical device according to one of the preceding claims, characterized in that the holding material and / or the mounting support according to claim 4 has a thermal conductivity between 1 W / (m*K) and 150 W / (m*K), preferably between 5 W / (m*K) and 100 W / (m*K).

6. Electrical device according to one of the preceding claims, characterized in that the holding material is thermally conductive by the addition of graphite and / or carbon, preferably with a thermal conductivity according to claim 5.

7. Electrical device according to one of the preceding claims, characterized in that a continuous recess is provided in the retaining material, wherein preferably the recess is completely surrounded laterally by the retaining material, and a thermally conductive material is arranged in the recess, which rests on the housing and which has a thermal conductivity greater than that of the retaining material, wherein the thermal conductivity is between 10 W / (m*K) and 250 W / (m*K), preferably between 25 W / (m*K) and 160 W / (m*K), wherein in particular components on the component carrier or the component carrier or a mounting carrier according to claim 4 or 5 are directly connected to or in contact with the thermally conductive material in a heat-transferring manner.

8. Electrical device according to one of the preceding claims, characterized in that the holding material has vibration-damping properties or has a hardness between 5 Shore A and 90 Shore A, preferably between 10 Shore A and 60 Shore A.

9. Electrical device according to one of the preceding claims, characterized in that the holding material and / or the mounting support according to claim 4 or 5 are electrically insulating, wherein in particular the mounting support is made of plastic.

10. Electrical device according to one of the preceding claims, characterized in that the holding material and / or the mounting bracket according to claim 4 or 5 are waterproof.

11. Electrical appliance according to one of the preceding claims, characterized in that the holding material is a metal foam, preferably comprising aluminium or zinc, in particular with a foam density between 0.5 g / cm³ 3 and 1.0 g / cm² 3and / or with a modulus of elasticity between 3 GPa and 9 GPa.

12. Electrical device according to one of claims 1 to 10, characterized in that the holding material is a metamaterial, preferably a vibroacoustic metamaterial or a metamaterial whose effective thermal conductivity and / or modulus of elasticity can be changed.

13. Electrical device according to one of claims 1 to 10, characterized in that the holding material is a folded flat material, in particular with a regular shape deformed by folding, wherein preferably the folded flat material has a height that is a multiple of the thickness of the flat material itself.

14. Electrical device according to one of the preceding claims, characterized in that the component carrier and / or the mounting carrier according to claim 4 or 5 bears substantially over its entire surface against the holding material with one of its sides, wherein preferably the side of the component carrier bearing over its entire surface against the holding material has fewer and / or smaller components.

15. Electrical appliance according to claim 4 or 5 or 12, characterized in that the mounting bracket is designed in a tub-like manner with a bottom and with circumferential side walls or with lateral supports on the sides.

16. Electrical appliance according to one of the preceding claims, characterized in that the holding means are designed in a trough-like manner with a bottom and with circumferential side walls or with lateral holders on the sides, wherein preferably the bottom of the holding means is formed over a full surface.

17. Electrical appliance according to one of the preceding claims, characterized in that the housing in the lower area or on a housing base is completely covered with the retaining means or the retaining material, wherein preferably the retaining material also extends along the sides of the housing, in particular extending continuously.

18. Electrical appliance according to one of the preceding claims, characterized in that the electrical appliance is a water-bearing household appliance, in particular a washing machine, wherein the component carrier is preferably arranged on a pull-out drawer, wherein further components of the washing machine such as a pump, filter or the like are arranged in the drawer, wherein in particular the drawer is arranged in the lower area or in the lowest area of ​​the washing machine at its front.

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