Cleaning device

Abstract

The invention relates to a cleaning device (10), in particular in the form of a floor cleaning device (12), comprising at least one electrical consumer (16, 18, 30), at least one energy storage device (44) for supplying the at least one electrical consumer (16, 18, 30) with electrical energy, and at least one liquid container (38) with a container receiving space (40) for receiving a liquid (42) which can be applied to a surface (28) to be cleaned or received from a surface (28) to be cleaned by the cleaning device (10), wherein the cleaning device (10) comprises at least one cooling device (46) arranged or designed to be thermally connected with the at least one energy storage device (44) for cooling the at least one energy storage device (44).

Description

[0001] The present invention relates to a cleaning device, in particular in the form of a floor cleaning device, comprising at least one electrical consumer, at least one energy storage device for supplying the at least one electrical consumer with electrical energy and at least one liquid container with a container receiving space for receiving a liquid which can be applied to a surface to be cleaned or received from a surface to be cleaned by the cleaning device.

[0002] Cleaning devices of the type described above are known in a variety of forms, particularly floor cleaning devices. For example, they are used in the form of scrubber-dryers for wet cleaning floors.

[0003] One problem with such cleaning devices is the heating of the at least one energy storage unit. This is usually in the form of a rechargeable battery, which can heat up considerably during operation of the cleaning device. The result is an undesirably high operating temperature and, consequently, a correspondingly long cooling time. A user therefore has to wait a relatively long time before the battery can be recharged.

[0004] CN 118236008 A describes a cleaning device, a storage structure, and methods for manufacturing them. A cleaning device is known from CN 115607049 A. A suction device is disclosed in JP 2006-247093 A. JP 2002-291669 A deals with a battery-powered suction device. A battery-powered suction device and methods for cooling a battery-powered suction device are known from US 2006 / 0080804 A1.

[0005] It is therefore an object of the present invention to avoid excessive heating of the at least one energy storage device during operation of the cleaning device.

[0006] This problem is solved according to the invention in a cleaning device of the type described above by the fact that the cleaning device comprises at least one cooling device arranged or designed to be thermally connected to the at least one energy storage device for cooling the at least one energy storage device.

[0007] Further developing a cleaning device in the proposed manner makes it possible, in particular, to optimally cool the at least one energy storage device. This is achieved, in particular, by a thermal connection between the at least one cooling device and the at least one energy storage device. For a particularly direct thermal connection, the at least one cooling device can be arranged or designed accordingly. In particular, it can be in direct contact with the at least one energy storage device in order to dissipate heat directly from the at least one energy storage device and transfer it to the at least one cooling device. In this way, an increase in the operating temperature of the at least one energy storage device during operation of the cleaning device can at least be limited.Advantageously, limiting the operating temperature in this way results in a significantly shorter cooling time before the at least one energy storage device can be recharged compared to known cleaning devices. Furthermore, this approach also minimizes the aging effect of the at least one energy storage device. In particular, it eliminates the need to use battery cells with low resistance to keep the heating of the at least one energy storage device within a manageable and tolerable range.In particular, the proposed further development makes it possible to arrange the at least one energy storage device inside the cleaning device and to completely dispense with air cooling of the same, because the heat generated in the at least one energy storage device during operation of the cleaning device can be defined and dissipated in the desired manner through the thermal interaction with the at least one cooling device.

[0008] It is advantageous if at least one cooling device is designed as a passive cooling device. This is particularly beneficial because no energy is then required to operate the cooling device itself.

[0009] The at least one cooling device can be easily designed if it includes at least one passive cooling element. In particular, the passive cooling element can be designed in the form of a heat sink with at least one cooling fin. The heat sink can be arranged or designed to be thermally connected to the at least one energy storage device, either directly or indirectly. The at least one cooling fin makes it possible, in particular, to dissipate heat from the heat sink, for example, by air cooling, specifically by directing air past the at least one cooling fin for cooling purposes. Optionally, a fan can be used for this purpose to force air to flow past the at least one cooling fin in order to cool the heat sink.

[0010] According to a further preferred embodiment, the at least one cooling device may include the at least one liquid container. In particular, this container may be at least partially filled with liquid. In other words, with the proposed, further developed cleaning device, it is particularly possible to transfer heat generated in the at least one energy storage device during its operation to the at least one liquid container, and especially to the liquid contained therein. The at least one liquid container can thus be used, firstly, to collect liquid that can be applied to a surface to be cleaned by the cleaning device or that has been collected by it, and secondly, to use this liquid to absorb heat generated in the at least one energy storage device.This makes it possible, in particular, to arrange or design the at least one energy storage device inside the cleaning device and to cool it via the at least one liquid container by transferring operating heat from the at least one energy storage device to the at least one liquid container, especially the liquid contained therein. With such a cooling device comprising the at least one liquid container, liquid cooling of the at least one energy storage device can be implemented in a simple manner. Due to the special arrangement of the at least one energy storage device, any liquid contained in the at least one liquid container, for example, fresh water or process water, can serve as a cooling liquid and thus as a coolant for cooling the at least one energy storage device.The heat generated by the at least one energy storage device during the operation of the cleaning device can thus be transferred to the coolant, for example water, in particular fresh water or process water, contained in the at least one liquid container.

[0011] It is advantageous if the at least one liquid container comprises a container base and a container wall extending transversely, and in particular vertically, from the container base, thus defining the container receiving space. This allows for a particularly simple design of the liquid container. For example, the container wall can define any cross-sectional shape of the at least one liquid container, such as circular, oval, or polygonal, especially triangular or quadrilateral. For example, projections or recesses can also be formed in the area of ​​the container wall, so that the available installation space in the cleaning device can be optimally utilized with the at least one liquid container.

[0012] It is advantageous if, during the intended use of the cleaning device, the container bottom extends transversely, particularly vertically, to the direction of gravity, and if the container wall, particularly in the form of a circumferential container wall, extends against or substantially against gravity during the intended use of the cleaning device. In this way, it can be ensured that when a liquid is contained in the container's receiving chamber, both the container bottom and the container wall are in contact with the contained liquid. This allows, in particular, heat exchange from the at least one energy storage device to the liquid via both the container bottom and the container wall.

[0013] According to a further preferred embodiment, the at least one cooling device may include at least one heat-conducting element, and this heat-conducting element may be connected to or directly thermally linked to the at least one liquid container and / or the at least one energy storage device. Equipping a cooling device with at least one heat-conducting element in the manner described makes it possible, in particular, to transfer heat from the at least one energy storage device, via the heat-conducting element, directly or indirectly to the at least one liquid container and from there to the liquid contained in the container's receiving space. In this way, optimal cooling of the at least one energy storage device can be achieved.The at least one heat conducting element enables optimized heat transfer from the heat generated in the at least one energy storage device during operation of the cleaning device to the at least one liquid container.

[0014] Advantageously, the at least one heat-conducting element forms at least part of the container bottom and / or the container wall. In particular, a heat-conducting element can be integrated into the at least one liquid container, for example, as part of the container bottom and / or the container wall. This allows for optimal heat transfer from the at least one energy storage device to a liquid contained in the container's receiving space. Specifically, the liquid can be in direct contact with the at least one heat-conducting element, thus enabling optimized heat exchange.

[0015] Advantageously, the at least one energy storage device is thermally connected to the at least one liquid container or is designed to dissipate heat from the at least one energy storage device to the liquid contained in the at least one liquid container. This design makes it possible, in particular, to use the liquid contained in the at least one liquid container as a heat storage medium to dissipate excess heat from the at least one energy storage device. The heat absorbed by the liquid can then be easily dissipated from the cleaning device by removing the liquid from the at least one liquid container, in other words, by emptying the at least one liquid container. For example, a liquid container can be filled with fresh water, which is then applied to the surface to be cleaned.A separate liquid container can hold wastewater or process water, which is drawn from the surface to be cleaned by the cleaning device. Heat can be absorbed by both the fresh water and the process water. When the process water is removed from the at least one liquid container by emptying it, the heat absorbed by the at least one energy storage device can also be dissipated by the cleaning device. Refilling the at least one liquid container with fresh water then allows heat to be absorbed from the energy storage device.

[0016] According to a preferred embodiment, the cleaning device may comprise only a single liquid container or two, three, four, or more liquid containers. In particular, only one of the liquid containers may be thermally connected to the at least one energy storage device. However, it is also conceivable to arrange or design two, three, four, or more liquid containers, in particular all liquid containers, of the cleaning device in thermal connection with the at least one energy storage device in order to use all liquid containers, or only a portion thereof, to dissipate heat generated in the energy storage device during operation of the cleaning device and thus keep it at the lowest possible operating temperature.

[0017] Preferably, the at least one liquid container is designed as a fresh water tank for receiving fresh water or as a process water tank for receiving process water. The fresh water tank can be used, in particular, to hold fresh water for application to a surface to be cleaned. The process water tank can receive process water, especially wastewater, from the surface to be cleaned. Particularly effective cooling can be achieved by filling the fresh water tank with very cool fresh water. The lower the temperature of the fresh water in the fresh water tank, the more heat can be dissipated by the at least one energy storage device and absorbed and stored by heating the fresh water in the fresh water tank. Similarly, the process water in the process water tank can absorb heat from the at least one energy storage device.As previously explained, the heat absorbed by the cleaning device can be dissipated by replacing the process water, specifically by emptying the process water tank. The heat storage capacity formed by the process water tank can thus be effectively emptied, and the fresh water tank can be filled with cold fresh water to make it available for reabsorption of heat from the at least one energy storage device.

[0018] Advantageously, the at least one energy storage device is designed in the form of a rechargeable battery cell or a battery pack comprising at least one rechargeable battery cell. Depending on the type of cleaning device, such a battery pack or the at least one energy storage device can be recharged with electrical energy by recharging one or more battery cells to operate the cleaning device. Depending on the operating voltage and desired operating time, the cleaning device can comprise one or more energy storage devices, in particular several battery cells or even two, three, or more battery packs that can be connected in parallel and / or in series to provide the desired operating voltages and currents.

[0019] It is advantageous if the cleaning device includes one, two, three, four, five, six, or more energy storage units. The number of energy storage units depends in particular on the energy requirements of the cleaning device on the one hand, and on the other hand on the required operating voltage and currents.

[0020] Advantageously, at least two energy storage devices are connected in series or parallel. This allows the operating voltage of the cleaning device to be set as desired. When the at least two energy storage devices are connected in series, the voltages provided by the respective energy storage devices are added together; when they are connected in parallel, the available voltage corresponds to the voltage of a single energy storage device, with at least twice the operating current then being available.

[0021] It is advantageous if a first pole of at least one energy storage device is electrically connected to a second pole of at least another energy storage device. This electrically conductive connection can be achieved, in particular, by means of at least one electrically conductive connecting element. For example, connecting elements can be used that have an electrical conductivity at least equivalent to that of aluminum, preferably copper. The at least one electrically conductive connecting element can, for example, electrically connect the positive poles of two energy storage devices to each other, thus enabling a parallel connection of the two energy storage devices.However, it is also conceivable to connect the positive terminal of a first energy storage device and the negative terminal of a second energy storage device in order to electrically connect them in a series circuit.

[0022] For handling the cleaning device, it is advantageous if the at least one energy storage device is arranged or designed on a support element. In particular, two or more energy storage devices can also be arranged or designed on the support element. This allows, in particular, all energy storage devices encompassed by the cleaning device to be handled together with the support element.

[0023] A particularly compact design of the cleaning device can be achieved, in particular, by having the at least one heat-conducting element form or comprise the support element. In this case, the support element has a dual function. Firstly, it serves to accommodate one or more energy storage devices so that they can be handled together. Secondly, the support element acts as a heat-conducting element to transfer thermal energy, i.e., heat, from the at least one energy storage device via the heat-conducting element (in this case, the support element) to the at least one liquid container and then, in particular, to the liquid contained therein.

[0024] Advantageously, the support element forms part of the wall and / or the bottom of the container or is encompassed by the container wall and / or the bottom. In particular, this means that the support element is integrated into the container wall and / or the bottom to establish a direct thermal connection between the at least one energy storage device and a liquid contained in the at least one liquid container. However, the support element can also be arranged on the container wall and / or the bottom, thus forming, for example, part of it.

[0025] To ensure particularly good heat conduction, it is advantageous if the support element is arranged or designed to be directly or indirectly adjacent to the container receiving space. In particular, the support element can be pressed against the container bottom and / or the container wall. Optimal heat transfer between the at least one energy storage device and the liquid container, or the liquid contained therein, can be achieved, especially through full-surface contact between the support element and the container bottom and / or the container wall.

[0026] To reliably and efficiently transfer heat from the at least one energy storage device to the liquid contained in the at least one liquid container, it is advantageous for the support element to be in thermal contact with the container wall and / or bottom. Heat transfer can then occur through conduction. Unlike air cooling, heat can thus flow directly from the energy storage device to the at least one liquid container. Furthermore, a compact design for the cleaning device is possible. In particular, no ventilation ducts are required to cool the at least one energy storage device during operation. Instead, it is sufficient to arrange or design the at least one energy storage device in thermal contact with the at least one cooling device.

[0027] Preferably, the support element is made of a thermally conductive material. In particular, this can be a metallic material and / or a plastic. The higher the thermal conductivity of the material, the better the at least one energy storage device can be cooled during operation of the cleaning device and kept at the lowest possible operating temperature.

[0028] Advantageously, the metallic material is or contains copper and / or aluminum. In this way, thermal conductivities of at least approximately 200 W / (m·K) can be achieved, and in particular, those exceeding 400 W / (m·K).

[0029] Furthermore, it is advantageous if the plastic is or contains a thermally conductive thermoplastic polymer or at least one thermally conductive filler. Such plastics exhibit a thermal conductivity suitable for dissipating heat from the at least one energy storage device to the at least one liquid container. Examples of fillers or thermally conductive additives in plastics, particularly thermoplastics, include metals, metal oxides, nitrides, or carbon fibers. Suitable thermoplastics include, in particular, polyolefins such as polyethylene or polypropylene, acrylonitrile butadiene styrene (ABS), polyamides (PA), polylactic acid (PLA), polymethyl methacrylate (PMMA), polycarbonate (PC), polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), polystyrene (PS), polyetheretherketone (PEEK), and / or polyvinyl chloride (PVC).

[0030] Furthermore, it is advantageous if the support element is made of a material with a thermal conductivity of at least approximately 10 W / (m·K). In particular, the thermal conductivity of the support element material can be at least approximately 100 W / (m·K), and even more specifically, at least approximately 250 W / (m·K). Constructing a support element from such materials enables optimal heat dissipation and thus cooling of the at least one energy storage device.

[0031] According to a further preferred embodiment, the at least one energy storage device can define a longitudinal axis, and this longitudinal axis extends transversely, in particular perpendicularly, to the heat-conducting element or the support element, especially to a support element plane defined by the heat-conducting element or the support element. This arrangement has the particular advantage that heat can be dissipated from the at least one energy storage device with exceptional efficiency. In particular, for cylindrical cells, the thermal conductivity parallel to a longitudinal axis defined by them is more than ten times greater than in the radial direction with respect to the longitudinal axis. This also has the particular advantage that cooling of the at least one energy storage device can be achieved via its poles if these are arranged or formed on end faces.Furthermore, this allows multiple energy storage devices in the form of rechargeable battery cells to be arranged compactly yet with optimal cooling, namely by attaching or arranging end faces extending transversely to their defined longitudinal axes in thermal contact with the heat-conducting element or the support element. This enables optimal heat dissipation from the at least one energy storage device via the at least one heat-conducting element and / or the support element to the at least one liquid container and the liquid contained therein.

[0032] For optimal handling and accessibility of the at least one energy storage device, it is advantageous if it is located or designed outside the container's receiving space. In particular, it can thus be protected from liquids.

[0033] Preferably, the at least one liquid container is made of a plastic. In particular, this can be an electrically non-conductive plastic. However, the plastic can have the highest possible thermal conductivity to enable optimal heat dissipation from the at least one energy storage device to the liquid contained in the at least one liquid container. Furthermore, the production of a liquid container from a plastic is simple and cost-effective. In particular, virtually any shape of liquid container can be realized in this way.

[0034] Advantageously, the electrically non-conductive plastic is or contains at least one thermoplastic, in particular polyamide (PA), polycarbonate (PC), polyethylene (PE), or polypropylene (PP), and / or contains a thermally conductive filler. This prevents short circuits within the cleaning device. In particular, it prevents an unwanted electrical circuit from the at least one energy storage device to the at least one liquid container.

[0035] According to a further preferred embodiment, a first end of the at least one energy storage device can be thermally connected to the at least one liquid container via at least one insulating element. The at least one insulating element can, in particular, be an electrical insulator, i.e., a material whose electrical conductivity is less than 10⁻⁸ S·cm⁻¹ or which has a resistivity greater than 10⁻⁸ Ω·cm⁻¹. It is therefore, in particular, an electrical insulating element to prevent current flow from the at least one energy storage device to the at least one liquid container.

[0036] Preferably, the at least one insulating element is made of an electrically insulating potting material. This makes it particularly easy to create a flat connection to form an optimal thermal interface between the at least one energy storage device and the at least one liquid container. In this way, any cavities in the area between the at least one energy storage device and the at least one liquid container can be avoided, which could disrupt a direct heat flow from the at least one energy storage device to the at least one liquid container.

[0037] For optimal thermal coupling of the at least one energy storage device to the at least one liquid container, it is advantageous if the at least one energy storage device and the at least one liquid container are thermally connected by a potting compound formed from the potting material. This design makes it possible, in particular, to arrange or design the at least one energy storage device and the at least one liquid container as desired. A thermal connection can then be achieved, in particular, by the potting compound, which then thermally connects the at least one energy storage device and the at least one liquid container.

[0038] Advantageously, the potting material is silicone or a thermally optimized plastic and / or contains at least one mineral filler and / or at least one metal oxide as an additive. With such a potting material, the at least one energy storage device and the at least one liquid container can be optimally and thermally bonded by forming a potting seal. Furthermore, such a potting material is often easy to handle.

[0039] Furthermore, it is advantageous if the at least one insulating element forms the support element. In other words, the at least one energy storage device and the at least one liquid container can be arranged or designed in an electrically isolated manner by means of the support element. The support element can perform a dual function. Firstly, it can be used to arrange and position the at least one energy storage device. Secondly, it serves, in particular, to electrically isolate the at least one energy storage device and the at least one liquid container from each other.

[0040] It is advantageous if the at least one energy storage device comprises a housing and if the housing forms the at least one insulating element. Such a design makes it possible, in particular, to bring the at least one energy storage device, for example, via an outer surface of the housing, into direct thermal contact with the bottom or wall of the at least one liquid container, thus enabling a direct heat flow from the at least one energy storage device to the at least one liquid container. The energy storage device and the at least one liquid container are then electrically insulated by the insulating element, namely the housing of the at least one energy storage device.

[0041] Furthermore, it is advantageous if the battery cell is designed in the form of a cylindrical cell and has a first end face, a second end face, and a cladding surface connecting the first and second end faces, and if at most 20%, and in particular at most 10%, of the cladding surface is in direct thermal contact with the at least one insulating element. This arrangement has the particular advantage that heat can flow from the battery cell to the heat-conducting element or the support element via the first or second end face, and from there to the at least one liquid reservoir. As already mentioned above, the thermal conductivity of such cylindrical cells is more than ten times greater parallel to a defined longitudinal axis than in the radial direction relative to the longitudinal axis.This allows for optimal heat flow from the at least one energy storage device to the at least one liquid container, even if at most 20%, and in particular at most 10%, of the shell surface is in direct thermal contact with the at least one insulating element.

[0042] According to a further preferred embodiment, the at least one electrical consumer may be designed in the form of an electric motor. In particular, the electric motor may be designed to move the cleaning device and / or at least one cleaning element and / or to drive a conveying device for conveying the liquid from or into the at least one liquid container. In particular, the cleaning device may comprise one, two, three, or more such electric motors, which perform different functions.

[0043] Preferably, the cleaning device is designed as a self-propelled floor cleaning machine. In particular, it can be designed as a scrubber-dryer. Such machines can be operated independently of the mains power supply. Especially for cleaning large areas, these machines require suitable energy storage devices, specifically adapted to the desired cleaning performance, which can store the electrical energy required for operating the machines. For a compact design of the cleaning device, it is advantageous to arrange the energy storage devices compactly, i.e., in a block-like configuration.The proposed further development by providing a cooling device that is in thermal contact with the at least one energy storage device on the one hand and the at least one liquid container of the cleaning device on the other, enables optimal cooling of the at least one energy storage device even during longer operating times.

[0044] The foregoing description therefore includes in particular the embodiments of cleaning devices defined below in the form of numbered sentences: 1. Cleaning device (10), in particular in the form of a floor cleaning device (12), comprising at least one electrical consumer (16, 18, 30), at least one energy storage device (44) for supplying the at least one electrical consumer (16, 18, 30) with electrical energy, and at least one liquid container (38) with a container receiving chamber (40) for receiving a liquid (42) which can be applied to or received from a surface (28) to be cleaned by the cleaning device (10), characterized in that the cleaning device (10) comprises at least one cooling device (46) arranged or formed in a thermally connected manner with the at least one energy storage device (44) for cooling the at least one energy storage device (44). 2.Cleaning device according to sentence 1, characterized in that the at least one cooling device (46) is designed in the form of a passive cooling device. 3. Cleaning device according to any of the preceding sentences, characterized in that the at least one cooling device (46) comprises at least one passive cooling element (60), in particular in the form of a heat sink (62) with at least one cooling fin (64). 4. Cleaning device according to any of the preceding sentences, characterized in that the at least one cooling device (46) comprises the at least one liquid container (38), in particular at least partially filled with liquid (42). 5. Cleaning device according to any of the preceding sentences, characterized in that the at least one liquid container (38) comprises a container base (66) and a container wall (68) extending transversely, in particular vertically, away from the container base (38), which defines the container receiving space (40). 6.Cleaning device according to sentence 5, characterized in that the container bottom (66) extends transversely, in particular vertically, to the direction of gravity (70) during the intended use of the cleaning device (10), and that the container wall (68), in particular in the form of a circumferential container wall (68), extends opposite or substantially opposite to the direction of gravity (70) during the intended use of the cleaning device (10). 7. Cleaning device according to one of the preceding sentences, characterized in that the at least one cooling device (46) comprises at least one heat-conducting element (72) and that the at least one heat-conducting element (72) is encompassed by the at least one liquid container (38) or is directly thermally connected to the at least one liquid container (38) and / or to the at least one energy storage device (44). 8.Cleaning device according to sentence 7, characterized in that the at least one heat-conducting element (72) forms at least a part of the container bottom (66) and / or the container wall (68). 9. Cleaning device according to any of the preceding sentences, characterized in that the at least one energy storage device (44) is arranged or configured to be thermally connected to the at least one liquid container (38) for the purpose of dissipating heat from the at least one energy storage device (44) to the liquid contained in the at least one liquid container (38). 10. Cleaning device according to any of the preceding sentences, characterized in that the cleaning device (10) comprises only a single liquid container (38) or two, three, four or more liquid containers (38). 11.Cleaning device according to one of the preceding sentences, characterized in that the at least one liquid container (38) is designed in the form of a fresh water tank (92) for receiving fresh water (94) or in the form of a process water tank (96) for receiving process water (98). 12. Cleaning device according to one of the preceding sentences, characterized in that the at least one energy storage device (44) is designed in the form of a rechargeable battery cell (48) or in the form of a battery pack comprising at least one rechargeable battery cell (48). 13. Cleaning device according to one of the preceding sentences, characterized in that the cleaning device (10) comprises one, two, three, four, five, six or more energy storage devices (44). 14.Cleaning device according to one of the preceding sentences, characterized in that at least two energy storage devices (44) are connected in series or in parallel. 15. Cleaning device according to sentence 14, characterized in that a first pole (50) of at least one energy storage device (44) is electrically conductively connected to a second pole (52) of at least one further energy storage device (44), in particular by at least one electrically conductive connecting element (58). 16. Cleaning device according to one of the preceding sentences, characterized in that the at least one energy storage device (44) is arranged or formed on a support element (74). 17. Cleaning device according to sentence 16, characterized in that the at least one heat-conducting element (72) forms or comprises the support element (74). 18.Cleaning device according to sentence 16 or 17, characterized in that the support element (74) forms part of the container wall (68) and / or the container bottom (66) or is encompassed by the container wall (68) and / or the container bottom (66). 19. Cleaning device according to any one of sentences 16 to 18, characterized in that the support element (74) is arranged or formed directly or indirectly adjacent to the container receiving space (40), in particular being pressed against the container bottom (66) and / or the container wall (68). 20. Cleaning device according to any one of sentences 16 to 19, characterized in that the support element (74) is in thermal contact with the container wall (68) and / or the container bottom (66). 21. Cleaning device according to any one of sentences 16 to 20, characterized in that the support element (74) is made of a thermally conductive material, in particular a metallic material and / or a plastic. 22.Cleaning device according to sentence 21, characterized in that the metallic material is or contains copper and / or aluminum. 23. Cleaning device according to sentence 21 or 22, characterized in that the plastic is or contains a thermally conductive thermoplastic polymer or contains at least one thermally conductive filler. 24. Cleaning device according to one of sentences 16 to 23, characterized in that the support element (74) is made of a support element material with a thermal conductivity of at least approximately 10 Wm⁻¹ < K⁻¹ < , in particular at least approximately 100 Wm⁻¹ < K⁻¹ < , and further in particular at least approximately 250 Wm⁻¹ < K⁻¹ < . 25.Cleaning device according to one of sentences 16 to 24, characterized in that the at least one energy storage device (44) defines a longitudinal axis (80) and that the longitudinal axis extends transversely, in particular perpendicularly, to the heat-conducting element (72) and / or to the support element (74), in particular to a support element plane defined by the heat-conducting element (72) or by the support element (74). 26. Cleaning device according to one of the preceding sentences, characterized in that the at least one energy storage device (44) is arranged or formed outside the container receiving space (40). 27. Cleaning device according to one of the preceding sentences, characterized in that the at least one liquid container (38) is made of a plastic, in particular of an electrically non-conductive plastic. 28.Cleaning device according to sentence 27, characterized in that the electrically non-conductive plastic is a thermoplastic or contains a thermoplastic, in particular polyamide (PA), polycarbonate (PC), polyethylene (PE) or polypropylene (PP), and / or contains at least one thermally conductive filler. 29. Cleaning device according to one of the preceding sentences, characterized in that a first end (78) of the at least one energy storage device (44) is thermally connected to the at least one liquid container (38) via at least one insulating element (76). 30. Cleaning device according to sentence 29, characterized in that the at least one insulating element (76) is made of an electrically insulating potting material. 31.Cleaning device according to sentence 30, characterized in that the at least one energy storage device (44) and the at least one liquid container (38) are thermally connected by a potting compound (100) formed from the potting material. 32. Cleaning device according to sentence 30 or 31, characterized in that the potting material is silicone or a thermally optimized plastic and / or the potting material contains at least one mineral filler and / or at least one metal oxide as an additive. 33. Cleaning device according to one of sentences 29 to 32, characterized in that the at least one insulating element (76) forms the support element (74). 34. Cleaning device according to one of sentences 29 to 33, characterized in that the at least one energy storage device (44) comprises a housing and that the housing forms the at least one insulating element (76). 35.Cleaning device according to one of sentences 29 to 34, characterized in that the battery cell (48) is designed in the form of a cylindrical cell (84) and has a first end face (86), a second end face (88), and a cladding surface (90) connecting the first and the second end faces (86, 88), and that at most 20%, in particular at most 10%, of the cladding surface (90) is in direct thermal contact with the at least one insulating element (76). 36. Cleaning device according to one of the preceding sentences, characterized in that the at least one electrical load (16, 18, 30) is designed in the form of an electric motor (20, 22, 32), in particular for moving the cleaning device (10) and / or at least one cleaning element (24) and / or for driving a conveying device (34) for conveying the liquid (42) out of or into the at least one liquid container (38). 37.Cleaning device according to one of the preceding sentences, characterized in that the cleaning device (10) is designed in the form of a self-propelled floor cleaning machine (14), in particular in the form of a scrubber-dryer.

[0045] The following description of preferred embodiments of the invention, in conjunction with the drawing, serves for further explanation. The drawing shows: Figure 1: a schematic, partially cutaway view of a cleaning device in the form of a self-propelled floor cleaning machine; Figure 2: a schematic representation of an embodiment of a liquid container with energy storage devices arranged below a container bottom; Figure 3: a further embodiment of a part of a cleaning device comprising two liquid containers with energy storage devices arranged below a container bottom; Figure 4: a schematic representation of an embodiment of a liquid container with energy storage devices arranged in the region of a container wall; and Figure 5: a schematic representation of an embodiment of a liquid container with a plurality of energy storage devices arranged below a container bottom of the liquid container.

[0046] Figure 1Figure 10 schematically shows an embodiment of a cleaning device, generally designated by reference numeral 10, which is designed in the form of a floor cleaning device 12. It is a self-propelled floor cleaning machine 14 in the form of a scrubber-dryer.

[0047] The cleaning device includes at least one electrical consumer 16 or 18. The two consumers 16 and 18 are in Figure 1 They are shown schematically. They are designed in the form of electric motors 20 and 22, respectively. The electric motor 20 serves in particular to drive a cleaning element 24, and the electric motor 22 to drive wheels 26 of the cleaning device 10 to move it over a surface 28 to be cleaned.

[0048] Optionally, an additional electrical consumer 30 in the form of an additional electric motor 32 can be provided to drive a conveying device 34 in the form of a pump 36 for conveying liquids.

[0049] The cleaning device 10 further comprises a liquid container 38, which defines a container receiving chamber 40 for receiving a liquid. The liquid 42 can be applied to or received from the surface 28 to be cleaned by the cleaning device 10.

[0050] To supply the electrical consumers 16, 18 and 30, the cleaning device 10 includes at least one energy storage device 44.

[0051] The cleaning device 10 further comprises at least one cooling device 46, which is thermally connected or designed to cool the at least one energy storage device 44.

[0052] The at least one cooling device 46 is designed in the form of a passive cooling device.

[0053] In connection with the in the Figures 2 The operation of the at least one cooling device 46 is explained in more detail below with reference to the exemplary embodiments shown up to 5.

[0054] Figure 2 Figure 1 schematically shows a liquid container 38 of the cleaning device 10, which is filled with the liquid 42. This can be fresh water, with which the liquid container 38 is first filled and which is then applied to the surface 28 to be cleaned. The liquid container 38 can also be designed as a process water tank to receive process water, in particular wastewater from the surface 28 to be cleaned.

[0055] In Figure 2Several energy storage devices 44 in the form of rechargeable battery cells 48 are shown schematically. Each battery cell 48 comprises a first pole 50 and a second pole 52. The first pole 50 is designed in the form of a positive pole 54, the second pole 52 in the form of a negative pole 56.

[0056] At the in Figure 2 In the schematically illustrated embodiment, the energy storage devices 44 are connected in series. A first pole 50, namely a positive pole 54, of one energy storage device 44 is electrically conductively connected to a second pole 52, namely a negative pole 56, of another energy storage device 44. This connection is made by an electrically conductive connecting element 58, which is designed in the form of a large-area, flat cell connector.

[0057] In alternative embodiments not shown in the figures, at least two energy storage devices 44 are connected in parallel. In such a configuration, two first poles 50 of two energy storage devices 44 are electrically connected to each other by means of an electrically conductive connecting element 58. Likewise, two second poles 52 of these two energy storage devices 44 are electrically connected to each other via an electrically conductive connecting element 58.

[0058] The number of energy storage devices 44 and their arrangement, in particular whether they are connected in series or in parallel, whereby a partial series connection of energy storage devices 44 and a partial parallel connection of energy storage devices 44 are also conceivable, can provide an operating voltage for the cleaning device 10 and specify a maximum available amount of electrical energy.

[0059] As explained, the energy storage devices 44 heat up during the operation of the cleaning device 10, especially when the rechargeable battery cells 48 provide current to operate the consumers 16, 18 and 30 or when they are being charged.

[0060] To prevent excessive heating of the energy storage devices 44, a cooling device 46 is provided. It comprises at least one passive cooling element 60. This can, for example, be a heat sink 62 with one or more cooling fins 64. The heat sink 62 with a schematically represented cooling fin 64 is shown schematically as an optional element in Figure 2.

[0061] The cooling device 46 also includes the liquid container 38, which is filled with liquid 42. As will be explained in more detail below, it is arranged or configured in direct or indirect thermal connection with the energy storage devices 44.

[0062] The liquid container 38 comprises a container base 66 and a container wall 68 extending transversely, and in the illustrated embodiment vertically, away from the container base 66. The container receiving space 40 is bounded in a gravitational direction 70 from the container base 66 and transversely to the gravitational direction 70 by the container wall 68. The liquid container 38 can, in particular, have any shape. For example, it can be schematically represented as follows: Figure 2 depicted as cuboid or essentially cuboid in shape.

[0063] When the cleaning device is used as intended, the bottom of the container 66 extends transversely, namely perpendicularly, to the direction of gravity 70. Accordingly, when the cleaning device 10 is used as intended, the wall of the container 68 extends from the bottom of the container 66 in the opposite direction of gravity 70.

[0064] The cooling device 46 comprises one or more heat-conducting elements 72. In the exemplary embodiment, one heat-conducting element 72 is Figure 2 encompassed by the liquid container 38. It is therefore directly thermally connected to the liquid container 38.

[0065] The heat-conducting element 72 forms part of the container bottom 66 and is thus positioned as in Figure 2 schematically shown in direct contact with liquid 42 taken up in the container receiving chamber 40.

[0066] The energy storage devices 44 are thermally connected to the liquid container 38 or are designed to dissipate heat from the energy storage devices 44 to the liquid 42 in the liquid container 38.

[0067] In the exemplary embodiment of the Figure 2The energy storage devices 44 are arranged on a support element 74. In this embodiment, the support element 74 includes the heat-conducting element 72. As explained, the support element 74 thus forms part of the container bottom 66 or is encompassed by it. In this embodiment, the support element 74 is directly adjacent to the container receiving space 40.

[0068] To prevent current flow from the energy storage devices 44 to the liquid container 38, an insulating element 76 is provided. The first ends 78 of the energy storage devices 44 are thermally connected to the liquid container 38 via the insulating element 76. The insulating element 76 is made of an electrically insulating potting compound. This is a thermally conductive thermoplastic polymer or contains at least one highly thermally conductive filler. As shown in Figure 2As can be clearly seen, the connecting elements 58 lie flat against the insulating element 76. The insulating element 76 is in turn connected flat to the heat-conducting element 72. In particular, the energy storage devices 44 can be pressed together with the insulating element 76 and the heat-conducting element 72.

[0069] In the described embodiments, metals, metal oxides, nitrides, and / or carbon fibers are used as fillers or thermally conductive additives in plastics, particularly thermoplastics. The thermoplastics used in the described embodiments include, in particular, polyolefins such as polyethylene or polypropylene, acrylonitrile butadiene styrene (ABS), polyamides (PA), polylactic acid (PLA), polymethyl methacrylate (PMMA), polycarbonate (PC), polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), polystyrene (PS), polyetheretherketone (PEEK), and / or polyvinyl chloride (PVC).

[0070] In this embodiment, the insulating element 76 forms at least part of the support element 74. In particular, for the manufacture of the cleaning device 10, it is also possible to first bring the insulating element 76 into thermal connections with the flat connecting elements 78 and then to press the insulating element 76 with the heat-conducting element 72 in order to enable optimal heat dissipation from the energy storage devices 44 to the liquid 42 contained in the liquid reservoir 38.

[0071] In an embodiment not shown, one or more energy storage devices 44 are arranged or formed in a housing. In this case, the housing can then, in particular, serve as an insulating element 76. In particular, an energy storage device 44 can also be designed in the form of a battery pack (not shown) comprising one or more rechargeable battery cells 48. Its housing can then form the insulating element 76.

[0072] As explained, in the embodiment shown in Figure 2, the support element 74 comprises the heat-conducting element 72 and the insulating element 76. For good heat transfer, the support element 74 is made of a thermally conductive material, for example a metallic material and / or a plastic.

[0073] In one embodiment, the insulating element 76 is made of an electrically non-conductive plastic. Such non-conductors have an electrical conductivity of less than 10⁻⁸ S·cm⁻¹. The thermal conductivity element 72, on the other hand, is made of a metallic material in one embodiment. This can be copper and / or aluminum. The plastic used to form the insulating element is preferably silicone or a thermoplastic, for example, polyamides (PA), polycarbonate (PC), and / or polyethylene (PE).

[0074] In this embodiment, the support element 74 is made of two support element materials, namely the material for forming the heat conducting element 72 and the material for forming the insulating element 76.

[0075] The thermal conductivity of the insulating element 76 is at least approximately 10 Wm⁻¹ < K⁻¹ < . The thermal conductivity element 72 is made of a material which exhibits a thermal conductivity of at least approximately 100 Wm⁻¹ < K⁻¹ < .

[0076] The energy storage devices 44 each define a longitudinal axis 80, which extends transversely, in particular perpendicularly, to the heat-conducting element 72 or to the support element 74. The insulating element 76 or the heat-conducting element 72, and thus also the support element 74, define a support element plane 82. The longitudinal axes 80 of the energy storage devices 44 therefore extend transversely, in particular perpendicularly, to the support element plane 82.

[0077] The energy storage facilities 44 are located at the Figure 2In the illustrated embodiment, the energy storage devices are arranged or formed outside the container receiving space 40. In an embodiment not shown, they can also be formed or arranged inside the container receiving space 40. In this case, a reliable seal is provided to prevent any liquid from coming into contact with the energy storage devices 44.

[0078] The liquid container 38 is made of a plastic. This plastic is electrically non-conductive. Therefore, this plastic is a non-conductor. The electrically non-conductive plastic is or contains a thermoplastic polymer, which is optionally enriched with a thermally conductive filler.

[0079] The battery cells 48 are located in the Figure 2The illustrated embodiments are formed in the form of cylindrical cells 84. These have a first end face 86, a second end face 88, and a lateral surface 90 connecting the two end faces 86 and 88. The first pole 50, in the form of the positive pole 54, is arranged or formed on the first end face 86, and the second pole 52, in the form of the negative pole 56, is arranged or formed on the second end face 88.

[0080] During operation of the cleaning device 10, heat generated in the energy storage devices 44 can be transferred via their poles 50 and 52 through the support element 74, which comprises the heat-conducting element 72 and the insulating element 76, to the liquid 42 in the liquid reservoir 38. Regardless of whether the interior of the cleaning device 10 is ventilated or not, excess heat can thus be dissipated from the energy storage devices 44 to prevent overheating. The liquid 42 is therefore used directly to cool the energy storage devices 44. This is made possible by the direct or indirect thermal connection between the liquid reservoir 38, the liquid 42 contained therein, and the energy storage devices 44 via the heat-conducting element 72, the insulating element 76, and the support element 74, respectively.Even during prolonged operation of the cleaning device 10, sufficient cooling of the energy storage devices 44 can be ensured. This has a positive effect on the aging of the energy storage devices 44. Aging can thus be slowed down compared to known cleaning devices. In addition, cooling times until a maximum permissible charging temperature is reached are also reduced, enabling the energy storage devices 44 to be recharged.

[0081] Heat absorbed by the liquid 42 can be easily removed from the cleaning device 10 by emptying the liquid container 38 and filling it, for example, with fresh water which is correspondingly cool and can therefore absorb a lot of heat.

[0082] Figure 3Another embodiment of a cooling device 46 for a cleaning device 10. In this embodiment, the cleaning device 10 comprises two liquid containers 38 and 39. The central liquid container 38 is surrounded by the liquid container 39 in an annular form. In this embodiment, the liquid container 38 is designed as a fresh water tank 92 for receiving fresh water 94. The liquid container 38 is designed as a process water tank 96 for receiving process water 98.

[0083] The cleaning device 10 is designed such that fresh water 94 can be applied from the fresh water tank 92 to the surface 28 to be cleaned. The cleaning device 10 can also collect the process water 98 from the surface 28 to be cleaned and introduce it into the process water tank 96. Due to the arrangement of the fresh water tank 92 within the process water tank 96, the center of gravity of the cleaning device 10 remains practically constant during operation.

[0084] The cooling device 46 is identical in this embodiment to that in the embodiment of the Figure 2The heat-conducting element 72 forms part of the container bottom 66, such that it is in contact with the liquid 42 in both the fresh water tank 92 and the process water tank 96. The liquid 42 in both the liquid reservoir 38 and the liquid reservoir 39 thus serves to cool the energy storage device 44. Regardless of the fill level in the two liquid reservoirs 38 and 39, a thermal connection between the energy storage devices 44 and the liquids 42 contained in the liquid reservoirs 38 and 39 can therefore be ensured.

[0085] Figure 4 Figure 1 shows a further embodiment of an arrangement of a cooling device 46 and a cleaning device 10. The setup in the embodiment of the Figure 4 differs from the structure of the exemplary embodiment of the Figure 2 merely by virtue of the fact that the heat conducting element 72 in the exemplary embodiment of the Figure 4forms part of the container wall 68.

[0086] The arrangement in the exemplary embodiment of the Figure 4 in contrast to the arrangement in the exemplary embodiment of the Figure 2 in particular the disadvantage that as the fill level in the liquid container 38 decreases, the area over which heat can be exchanged between the heat conducting element 72 and the liquid 42 is reduced.

[0087] Furthermore, regarding the arrangement of the energy storage devices 44 on the heat conducting element 72, reference can be made to the above description of the exemplary embodiment. Figure 2 be referred.

[0088] In embodiments not shown, heat-conducting elements 72 are arranged or formed both on the bottom of the container 66 and on the wall of the container 68.

[0089] Another embodiment of an arrangement for forming a cooling device 46 of a cleaning device 10 is shown schematically in Figure 5shown. In this embodiment, the energy storage devices 44 are arranged analogously to those in the embodiments of Figures 2 to 4 arranged and electrically connected with connecting elements 58.

[0090] In the exemplary embodiment of the Figure 5 The container bottom 66 is formed continuously, i.e., it is not partially formed by a heat-conducting element 72. Rather, the connecting elements 58 are pressed flat against the container bottom 66.

[0091] For good thermal connection of the liquid container 38 to the energy storage devices 44, an insulating element 76 is used, which is made of an electrically insulating potting material. In other words, the energy storage devices 44 and the liquid container 38 are thermally connected by a potting 100 formed from the potting material.

[0092] For good thermal connection of the energy storage devices to the liquid container 38, the potting material is or contains at least one metal oxide or at least one mineral filler.

[0093] In this embodiment, the potting compound 100 forms the insulating element 76. This in turn also defines the support element 74 and a support element plane 82 running parallel to the container bottom 66.

[0094] The longitudinal axes 80 of the battery cells 48 are oriented transversely, namely perpendicularly, to the support element plane 82.

[0095] Furthermore, it should be noted that in this embodiment as well, the outer surface 90 of each battery cell 48, which connects the end faces 86 and 88 of the battery cell 48, is in direct thermal contact with the insulating element 76, and thus with the potting compound 100, to a maximum of 20%. As already explained, the thermal conductivity of cylindrical cells 84 is more than ten times greater parallel to their longitudinal axis 80 than in the radial direction. Therefore, particularly in this embodiment, but also in the other described embodiments, the energy storage devices 44 can be cooled via their poles 50 and 52, respectively.

[0096] The arrangement of the energy storage devices 44 and the potting compound 100 can be carried out on the bottom of the container 66 in an analogous manner as in connection with Figure 4 This can of course also be shown on the container wall 68 or both on the container floor 66 and on the container wall 68.

[0097] The cleaning device 10 as described above in conjunction with the embodiments described above. Figures 2 to 5 As explained, the design enables optimal cooling of the electrical energy storage devices 44 during operation of the cleaning device 10. The cleaning device 10 can thus be designed to be compact. Air cooling of the energy storage devices 44 is not required. Therefore, the design of air ducts for air cooling of the energy storage devices 44 is unnecessary. As described, these can be cooled by direct or indirect thermal contact with the at least one liquid container 38 and the liquid 42 contained therein. Reference symbol list

[0098] 10 Cleaning device 12 Floor cleaning device 14 Floor cleaning machine 16 Consumer 18 Consumer 20 Electric motor 22 Electric motor 24 Cleaning element 26 Wheel 28 Surface 30 Consumer 32 Electric motor 34 Conveyor device 36 Pump 38 Liquid container 39 Liquid container 40 Container receiving chamber 42 Liquid 44 Energy storage device 46 Cooling device 48 Battery cell 50 First pole 52 Second pole 54 Positive pole 56 Negative pole 58 Connecting element 60 Cooling element 62 Heat sink 64 Cooling fin 66 Container bottom 68 Container wall 70 Gravity direction 72 Heating element 74 Support element 76 Insulating element 78 First end 80 Longitudinal axis 82 Support element plane 84 Cylindrical cell 86 First end face 88 Second end face 90 Shell surface 92 Fresh water tank 94 Fresh water 96 Process water tank 98 Process water 100 Potting

Claims

1. Cleaning device (10), in particular in the form of a floor cleaning device (12), comprising at least one electrical consumer (16, 18, 30), at least one energy storage device (44) for supplying the at least one electrical consumer (16, 18, 30) with electrical energy and at least one liquid container (38) with a container receiving space (40) for receiving a liquid (42) which can be applied to a surface (28) to be cleaned or received from a surface (28) to be cleaned by the cleaning device (10), characterized by the fact that the cleaning device (10) comprises at least one cooling device (46) arranged or designed to be thermally connected with the at least one energy storage device (44) for cooling the at least one energy storage device (44).

2. Cleaning device according to claim 1, characterized by the fact thatwhich includes at least one cooling device (46) in the form of a passive cooling device.

3. Cleaning device according to one of the preceding claims, characterized by the fact that comprising at least one cooling device (46) a) at least one passive cooling element (60), in particular in the form of a cooling body (62) with at least one cooling fin (64), and / or b) the at least one liquid container (38), in particular at least partially filled with liquid (42).

4. Cleaning device according to one of the preceding claims, characterized by the fact thatthe at least one liquid container (38) comprises a container bottom (66) and a container wall (68) extending transversely, in particular vertically, away from the container bottom (38), which define the container receiving space (40), wherein in particular the container bottom (66) extends transversely, in particular vertically, to the direction of gravity (70) when the cleaning device (10) is used as intended, and wherein the container wall (68), in particular in the form of a circumferential container wall (68), extends in the opposite or substantially opposite direction of gravity (70) when the cleaning device (10) is used as intended.

5. Cleaning device according to one of the preceding claims, characterized by the fact thata) the at least one cooling device (46) comprises at least one heat-conducting element (72) and that the at least one heat-conducting element (72) comprises the at least one liquid container (38) or is directly thermally connected to the at least one liquid container (38) and / or to the at least one energy storage device (44), wherein in particular the at least one heat-conducting element (72) forms at least a part of the container bottom (66) and / or the container wall (68), and / or b) the at least one energy storage device (44) is arranged or designed to be thermally connected to the at least one liquid container (38) for the purpose of dissipating heat from the at least one energy storage device (44) to the liquid contained in the at least one liquid container (38).

6. Cleaning device according to one of the preceding claims, characterized by the fact thata) the cleaning device (10) comprises only one liquid container (38) or two, three, four or more liquid containers (38) and / or b) the at least one liquid container (38) is designed in the form of a fresh water tank (92) for receiving fresh water (94) or in the form of a process water tank (96) for receiving process water (98).

7. Cleaning device according to one of the preceding claims, characterized by the fact thata) the at least one energy storage device (44) is designed in the form of a rechargeable battery cell (48) or in the form of a battery pack comprising at least one rechargeable battery cell (48) and / or b) the cleaning device (10) comprises one, two, three, four, five, six or more energy storage devices (44) and / or c) at least two energy storage devices (44) are connected in series or in parallel, wherein in particular a first pole (50) of at least one energy storage device (44) is electrically conductively connected to a second pole (52) of at least one further energy storage device (44), in particular by at least one electrically conductive connecting element (58).

8. Cleaning device according to one of the preceding claims, characterized by the fact thatthe at least one energy storage device (44) is arranged or formed on a support element (74), wherein in particular the at least one heat conducting element (72) forms or comprises the support element (74).

9. Cleaning device according to claim 8, characterized by the fact thatthe support element (74) a) forms part of the container wall (68) and / or the container bottom (66) or is encompassed by the container wall (68) and / or the container bottom (66) and / or b) is arranged or formed directly or indirectly adjacent to the container receiving space (40), in particular is pressed with the container bottom (66) and / or the container wall (68), and / or c) is in thermal contact with the container wall (68) and / or the container bottom (66) and / or d) is made of a thermally conductive material, in particular a metallic material and / or a plastic, wherein in particular - the metallic material is or contains copper and / or aluminum and / or - the plastic is or contains a thermally conductive thermoplastic polymer or contains at least one thermally conductive filler.

10. Cleaning device according to claim 8 or 9, characterized by the fact thata) the support element (74) made of a support element material with a thermal conductivity of at least approximately 10 Wm -1 K -1 , in particular at least approximately 100 Wm -1 K -1 , furthermore, in particular at least approximately 250 Wm -1 K -1 , is formed, and / or b) the at least one energy storage device (44) defines a longitudinal axis (80) and that the longitudinal axis extends transversely, in particular perpendicularly, to the heat conducting element (72) and / or to the support element (74), in particular to a support element plane defined by the heat conducting element (72) or by the support element (74).

11. Cleaning device according to one of the preceding claims, characterized by the fact thata) the at least one energy storage device (44) is arranged or designed outside the container receiving space (40) and / or b) the at least one liquid container (38) is made of a plastic, in particular of an electrically non-conductive plastic, wherein in particular the electrically non-conductive plastic is a thermoplastic or contains a thermoplastic, in particular polyamide (PA), polycarbonate (PC), polyethylene (PE) or polypropylene (PP), and / or contains at least one thermally conductive filler.

12. Cleaning device according to one of the preceding claims, characterized by the fact that a first end (78) of the at least one energy storage device (44) is thermally connected to the at least one liquid container (38) via at least one insulating element (76).

13. Cleaning device according to claim 12, characterized by the fact thatthe at least one insulating element (76) is formed from an electrically insulating potting material, wherein in particular a) the at least one energy storage device (44) and the at least one liquid container (38) are thermally connected by a potting (100) formed from the potting material and / or b) the potting material is silicone or a thermally optimized plastic and / or the potting material contains at least one mineral filler and / or at least one metal oxide as an additive.

14. Cleaning device according to claim 12 or 13, characterized by the fact thata) the at least one insulating element (76) forms the support element (74) and / or b) the at least one energy storage device (44) comprises a housing and that the housing forms the at least one insulating element (76) and / or c) the battery cell (48) is designed in the form of a cylindrical cell (84) and has a first end face (86), a second end face (88) and a cladding surface (90) connecting the first and the second end faces (86, 88) and that at most 20%, in particular at most 10%, of the cladding surface (90) is in direct thermal contact with the at least one insulating element (76).

15. Cleaning device according to one of the preceding claims, characterized by the fact thata) the at least one electrical consumer (16, 18, 30) is designed in the form of an electric motor (20, 22, 32), in particular for moving the cleaning device (10) and / or at least one cleaning element (24) and / or for driving a conveying device (34) for conveying the liquid (42) out of or into the at least one liquid container (38) and / or b) the cleaning device (10) is designed in the form of a self-propelled floor cleaning machine (14), in particular in the form of a scrubber-dryer.

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