Hot-water high-pressure cleaner

Abstract

The present invention relates to a hot-water high-pressure cleaner (10), the hot-water high-pressure cleaner (10) comprising: a motor unit (11) for providing drive energy; a pump unit (12) for generating high pressure; a heating unit (13a) having a storage unit (13b) for providing heated water, and a hose reel (14) for receiving a high-pressure hose; the hose reel (14) being operatively connected to an actuating element in such a way that the hose reel is automatically rotatable about a central longitudinal axis (ML) of the hose reel, at least for winding up the high-pressure hose.

Description

[0001] Hot water high-pressure cleaner

[0002] The present invention relates to a hot water high-pressure cleaner.

[0003] Hot water pressure washers for cleaning surfaces are known in the art. Hot water pressure washers have a high-pressure hose or are connected to one to which a high-pressure lance is or can be attached to provide a concentrated water jet and direct it onto a surface to be cleaned. Such hot water pressure washers are used in many different areas. For example, hot water pressure washers are used in the automotive industry, the construction sector, and agriculture. Hot water pressure washers are also used in hygiene rooms, hospitals, slaughterhouses, and commercial kitchens. Hot water pressure washers enable shorter cleaning times, shorter drying times, and significantly reduced cleaning agent usage.Furthermore, hot water pressure washers have a germ-reducing effect and enable more effective breaking down of lubricant residues. Furthermore, they allow for more gentle cleaning of sensitive surfaces at lower operating pressure while maintaining the same cleaning effect.

[0004] For improved handling and flexible use, the high-pressure hose of the hot water pressure washer is usually designed or lengthened to allow the high-pressure lance to be used flexibly and variably for cleaning or surface treatment. The high-pressure hose can usually be several meters long, allowing for the largest possible application area around the hot water pressure washer. It has become apparent that there is a need for an improved hot water pressure washer.

[0005] The object of the present invention is to provide an improved hot water high-pressure cleaner. In particular, it is an object of the present invention to provide a hot water high-pressure cleaner that allows for easier handling.

[0006] The problem is solved by the features of the independent claims. The dependent claims present advantageous possible embodiments of the invention.

[0007] One aspect of the present invention relates to a hot water high-pressure cleaner, wherein the hot water high-pressure cleaner comprises: a motor unit for providing drive energy; a pump unit for generating a high pressure; a heating unit with a storage unit for providing heated water, and a hose reel for receiving a high-pressure hose; wherein the hose reel is operatively connected to an actuating element such that the hose reel is automatically rotatable about a central longitudinal axis of the hose reel, at least for rolling up the high-pressure hose.

[0008] In contrast to the prior art, the present invention allows for automatic or self-retracting of the high-pressure hose. Prior art high-pressure cleaners have a hand crank for retracting the high-pressure hose onto the hose reel. This is laborious and time-consuming. Furthermore, when using the hot water high-pressure cleaner, the unrolled high-pressure hose can get in the way and hinder work. A high-pressure hose lying around also represents a safety hazard. Because the high-pressure hose can be automatically retracted onto the hose reel, it is possible to quickly stow the high-pressure hose and create space. Furthermore, the high-pressure hose can always be unrolled as far as necessary, preventing it from becoming kinky or otherwise damaged.The hose reel is therefore an automatic hose reel or can be described as such.

[0009] The motor unit is configured to provide drive energy. The drive energy provided by the motor unit is used in particular to operate the pump unit. The motor unit preferably comprises an electric motor, in particular a three-phase motor. This makes the hot water high-pressure cleaner particularly suitable for use in areas where exhaust gases are to be avoided, for example in areas that have high requirements for a hygienic environment. The electric motor can preferably be a three-phase motor with a power consumption of at least 4 kW, preferably at least 5.5 kW. The motor unit can be and / or can be connected directly to the pump unit via a shaft. Alternatively, combustion engines that use gasoline as fuel, for example, are possible as the motor unit.It is also possible for the hot water high-pressure cleaner to be supplied with energy, particularly electrical energy, via an interface.

[0010] The pump unit is configured to generate high pressure. The pump unit can comprise, for example, a centrifugal pump, a vane pump, or an in-line pump. An in-line pump is particularly advantageous for pumping larger volumes of water. A control element, in particular a rotary control, can be arranged on the pump unit, via which the discharge pressure of the pump unit can be regulated. This allows the performance or output pressure of the hot water high-pressure cleaner to be adjusted. Furthermore, the pump unit can comprise a pressure display, in particular a pressure gauge, so that the current actual discharge pressure of the pump unit can be read.

[0011] The heating unit and the storage unit preferably form a single unit. For example, the heating unit can be at least partially arranged in the storage unit to heat the water stored therein. In particular, the storage unit can have a cylindrical shape. The heating unit can, for example, comprise a heating element, in particular one or more heating coils, arranged in the cylindrical storage unit. This makes it possible to heat the water in the storage container to a desired temperature. It is advantageous if the storage unit has a symmetrical shape and a heating unit adapted to the shape. The water in the storage unit of the hot water high-pressure cleaner can preferably be heated to a temperature between 12°C and 155°C.Advantageously, the storage volume of the storage unit is greater than 15 l, preferably greater than 20 l, and particularly preferably greater than 40 l. This ensures or achieves a sufficient supply of heated cleaning fluid. It is advantageous if the desired temperature on the hot water high-pressure cleaner can be adjusted. An increased water temperature allows for a reduction in the required working pressure, the required time, and the amount of cleaning agent used.

[0012] The high-pressure hose is at least indirectly connected to the storage unit and the pump unit by a fluid connection. "Indirectly" here means that at least one other functional component of the hot water pressure washer can be arranged between them. The pump unit conveys the water heated in the storage unit into the high-pressure hose. The heated water can be transported via the high-pressure hose to a high-pressure lance. The high-pressure lance is located at a free end of the high-pressure hose. The heated water can be discharged in a concentrated stream through the high-pressure lance to treat a target area.

[0013] The hose reel serves to store the high-pressure hose in a space-saving manner and to provide the necessary portion of the high-pressure hose when needed. The hose reel comprises an actuating element. The actuating element is operatively connected to the hose reel or other components of the hose reel in such a way that the hose reel can automatically rotate about a central longitudinal axis of the hose reel, at least for winding up the high-pressure hose. The actuating element can, for example, be designed to store mechanical energy and release it again for automatically winding up the high-pressure hose. The actuating element can be designed to be manually or automatically activated. The central longitudinal axis of the hose reel is an axis that runs in particular through a center point of the hose reel. The central longitudinal axis extends in an axial direction of the hose reel.The axial direction thus runs orthogonally to a radial direction. Consequently, the central longitudinal axis can also be referred to as the rotation axis of the hose reel, or form or represent this. The term "automatically rotatable" means that the hose reel can perform a rotary movement without direct, in particular continuous, manual intervention, for example by cranking. In addition, it is possible for the hose reel to comprise a braking device or a fixing device that prevents or at least brakes the rotation of the hose reel. The braking device can, for example, comprise corresponding locking elements or teeth, which are each arranged on a rotatable and a stationary part of the hose reel and / or the hot water high-pressure cleaner.

[0014] In one embodiment, the hot water high-pressure cleaner comprises a support structure on which functional components of the hot water high-pressure cleaner are arranged, wherein the support structure in particular has two opposite longitudinal sides and two opposite transverse sides, wherein the hose reel is arranged on the support structure in such a way that the central longitudinal axis of the hose reel is arranged at an angle of between 0° and 10°, in particular 2°, to the longitudinal sides. In other words, the hose reel is arranged obliquely to the longitudinal sides on the support structure or obliquely to a longitudinal axis of the hot water high-pressure cleaner. This means that the high-pressure hose can be rolled up and / or unrolled essentially in a longitudinal direction of the hot water high-pressure cleaner. The oblique arrangement of the hose reel enables even rolling of the high-pressure hose onto the hose reel.Alternatively, it is conceivable that the central longitudinal axis of the hose reel is essentially orthogonal to the longitudinal sides. In this case, the term "essentially" refers to deviations between + / - 5% and + / - 10%.

[0015] The support structure can, for example, comprise a rack and / or a frame. Furthermore, the support structure can alternatively or additionally comprise a trough-shaped structure or body in which the functional components of the hot water pressure washer are accommodated or arranged. The functional components include, for example, the pump unit, heating unit, motor unit, and hose reel. The support structure makes it possible to transport the hot water pressure washer as a single unit, since all functional elements are arranged on it.

[0016] In one embodiment, the high-pressure cleaner has at least one contact surface arranged on a contact plane, wherein, starting from the contact plane, a center of gravity of the hose reel is arranged below a center of gravity of the motor unit. The contact surfaces can be part of the support structure. For example, the support structure can comprise extensions or feet, on each of which contact surfaces are arranged. It is also possible for the contact surfaces to be arranged on the wheels. The contact surfaces of the wheels are the surfaces or areas that are in contact with the contact plane.

[0017] In one embodiment, the center of gravity of the hose reel is located below the center of gravity of the heating unit with the storage unit, starting from the support plane. The heating unit and the storage unit are preferably formed as a single unit or in one piece. In particular, the heating unit is arranged at least partially within the storage unit.

[0018] The hose reel's lower center of gravity allows the high-pressure hose to be wound up and unwound without transferring forces to the support structure or other functional elements of the hot water pressure washer. This increases the stability of the hot water pressure washer, preventing it from swaying or tipping over when a tensile force is applied to the high-pressure hose.

[0019] In one embodiment, the rotational axis of the hose reel is arranged below a rotational axis of the motor unit, starting from the support plane. For example, the motor unit has a rotor element or an output shaft, each with a rotational axis, with the central longitudinal axis or rotational axis of the hose reel being arranged below the rotational axis of the rotor or the output shaft of the motor unit. This can also increase the stability of the hot water pressure washer.

[0020] Preferably, the central longitudinal axis of the hose reel can be arranged at an angle between 0° and 10°, in particular 2°, to the rotational axis of the motor unit or the rotational axis of the output shaft. This allows for particularly smooth running and / or reduces the space required by the device.

[0021] In one embodiment, the support structure or the hot water high-pressure cleaner comprises at least one wheel axle with two oppositely arranged wheels for moving the high-pressure cleaner. It is also possible for the support structure to comprise a second wheel axle with two further oppositely arranged wheels. Additionally or alternatively, a swivel caster can be provided on the support structure. The wheels make the hot water high-pressure cleaner easier to move. This is particularly advantageous because the hot water high-pressure cleaner can be heavy due to the integrated water storage unit.

[0022] In one embodiment, the hose reel is arranged, in particular on the support structure, such that the central longitudinal axis of the hose reel is arranged at an angle of between 0 and 10°, preferably between 1° and 8°, and particularly preferably 2°, to the wheel axis. In other words, the rotation axis of the hose reel is aligned obliquely to the wheel axis or arranged on the support structure. Alternatively, the central longitudinal axis of the hose reel can be aligned substantially parallel to the wheel axis. This means that the high-pressure hose can be rolled up and unrolled substantially in a longitudinal direction of the hot water high-pressure cleaner. The oblique arrangement of the hose reel enables the high-pressure hose to be rolled up evenly on the hose reel. In the present case, the term substantially refers to deviations between + / - 5% and + / - 10%.

[0023] In one embodiment, the running direction of the wheels essentially corresponds to the running direction of the hose reel. In other words, the hose reel is aligned essentially parallel to the wheels. Alternatively, the hose reel can be arranged at an angle to the wheels. In this case, the term "essentially parallel" refers to deviations between + / - 5% and + / - 10%.

[0024] In one embodiment, the actuating element comprises a spring element configured to provide a restoring force for the rotation of the hose reel. The spring element can in particular be a band spring or coil spring. The band spring or coil spring can be compressed by the rotation of the hose reel that occurs when the high-pressure hose is unwound from the hose reel. As a result, energy is stored in the band spring or coil spring, which is used to automatically roll up the high-pressure hose. The direction of rotation during unwinding is opposite to the direction of rotation during rolling up. Other spring elements, for example torsion springs, are also possible to provide a restoring force for rotation of the hose reel.

[0025] In one embodiment, the actuating element comprises an actuator configured to rotate the hose reel about the central longitudinal axis. The actuator can, for example, comprise an electric motor that transmits rotation to the hose reel. The electric motor can be used to rotate the hose reel in both directions about a rotation axis. This allows the high-pressure hose to be automatically wound onto the hose reel. Furthermore, the actuator can at least actively assist unwinding, thus reducing the pulling force required to unwind the high-pressure hose from the hose reel. This can further improve or simplify the handling of the hot water high-pressure cleaner.

[0026] In one embodiment, the hot-water high-pressure cleaner comprises a housing, which is arranged in particular on the support structure and in which the functional components are at least partially arranged. The housing can protect the high-pressure cleaner from contamination and damage. Furthermore, the housing can utilize waste heat from the functional components during operation to dry the high-pressure hose and other components more quickly. The housing can in particular be made of a plastic material. The housing is preferably at least partially removable from the support structure in order to be able to maintain, replace, and / or repair the functional components of the hot-water high-pressure cleaner.

[0027] Advantageously, the hose reel is arranged inside, preferably entirely inside, the housing. This protects the hose reel and / or the hose it contains from damage.

[0028] In one embodiment, a connection for the high-pressure hose is arranged on a transverse side of the hot water high-pressure cleaner. The transverse sides are the sides of the support structure or the housing that extend substantially orthogonal to the longitudinal sides. The transverse sides can also be referred to as end faces. The transverse sides preferably extend in a direction parallel to the wheel axis. The longitudinal sides of the support structure or the housing extend orthogonal to the wheel axis. In particular, the connection is arranged in this way substantially in a rolling direction of the hose reel of the hot water high-pressure cleaner. In one embodiment of the hot water high-pressure cleaner, the motor unit, the pump unit, the heating unit with the storage unit, and the hose reel can be handled and / or transported as a single unit. This means that the entire hot water high-pressure cleaner can be moved as a single unit.Furthermore, it is possible for the hot water high-pressure cleaner to be designed in such a way that it can be operated or used without an external water connection.

[0029] A further aspect of the present invention relates to the use of an automatic hose reel in a high-pressure cleaner, in particular in a hot-water high-pressure cleaner according to one of the aforementioned embodiments, wherein the hose reel is configured to automatically roll up a hose, in particular a high-pressure hose. Furthermore, a further aspect of the present invention relates to the use of a spring element, in particular a leaf spring, or an actuator, in particular an electric motor, as an actuating element for automatically rolling up a hose reel in a hot-water high-pressure cleaner.

[0030] Individual features and embodiments of the present invention can be combined with other features in other embodiments to form new embodiments. Advantages and developments mentioned for the features or embodiments also apply analogously to the new embodiments. Developments and advantages mentioned in connection with the device also apply analogously to method steps, and vice versa.

[0031] In the following, the disclosure will be described by way of example with reference to the accompanying figures, in which

[0032] Figure 1: a perspective view of an embodiment of a hot water high-pressure cleaner according to the invention. Figure 2: a top view of the hot water high-pressure cleaner according to Figure 1.

[0033] Figure 3: a side view of the hot water high-pressure cleaner according to Figure 1.

[0034] Figure 1 shows a perspective view of a hot water high-pressure cleaner 10. The hot water high-pressure cleaner 10 comprises a motor unit 11, a pump unit 12, a heating unit 13a with a storage unit 13b and a hose reel 14. These components or elements can also be referred to as functional components.

[0035] The aforementioned functional components are arranged, mounted, or supported on a support structure 15. The motor unit 11 is arranged longitudinally next to the heating unit 13a and transversely next to the pump unit 12. The hose reel 14 is arranged transversely next to the heating unit 13a with storage unit 13b. The pump unit 12 is arranged longitudinally next to the heating unit with storage unit 13b and / or the hose reel 14. The longitudinal direction of the hot water high-pressure cleaner 10 is understood to mean a direction in which the hot water high-pressure cleaner 10 extends the longest or furthest. In other words, the length of the hot water high-pressure cleaner is preferably measured in the longitudinal direction. The transverse direction of the hot water high-pressure cleaner is understood to mean a direction orthogonal to the longitudinal direction. The width of the hot water high-pressure cleaner is advantageously measured in the transverse direction.

[0036] The adjacent functional components are arranged at a short distance from one another. This enables a compact, space-saving design of the hot water high-pressure cleaner 10. Furthermore, the waste heat from the heating unit 13a, the storage unit 13b, and the motor unit 11 can be used to dry the high-pressure hose (not shown) and, if necessary, other areas of the hot water high-pressure cleaner 10. The support structure 15 comprises a frame on which a tray is arranged. The frame is formed from a profile element with a circular cross-section. The tray is formed from a thin-walled material, for example, a sheet metal material or a plastic. The tray is connected to the frame. The tray can form a base of the housing or the support structure 15 of the hot water high-pressure cleaner 10.

[0037] The frame can be constructed in multiple parts. In particular, the frame of the support structure 15 can comprise several frame elements that can be plugged together. Additionally, the frame elements can be connected to one another in a form-fitting, force-fitting, or material-fitting manner. Form-fitting and force-fitting connections are advantageously detachable or reversible. A material-fitting connection has a good capacity to transmit forces and moments, and no additional components such as screws are required to create it.

[0038] A housing 19 is arranged on the frame and the shell of the support structure 15. The housing 19 is only partially shown in Figure 1 for a better illustration of the hot water high-pressure cleaner 10. The housing 19 and the frame enclose or surround the functional components of the hot water high-pressure cleaner 10 at least partially, preferably completely. In other words, the functional components are encased by the housing 19. The frame is arranged on an outer side of the housing. The shell forms part of the housing 19. The housing 19 is preferably at least partially removable. This means that the housing 19 comprises, for example, several parts. This makes it possible to maintain, repair and / or replace the functional components as needed.

[0039] In the present embodiment, the housing 19 comprises two elements, in particular end elements 20, which are arranged opposite one another in the longitudinal direction and extend in the transverse direction of the hot water high-pressure cleaner 10. The two end elements 20 are connected to one another via a longitudinal web 21. The longitudinal web runs along the longitudinal direction of the hot water high-pressure cleaner 10. In other words, the longitudinal web 21 is arranged centrally in the longitudinal direction of the hot water high-pressure cleaner 10.

[0040] The hot water high-pressure cleaner 10 comprises four wheels 18. More specifically, the hot water high-pressure cleaner 10 comprises two pairs of wheels, each arranged on a wheel axle RA. The wheel axle RA is shown schematically in Figure 2. The wheel axle RA can be an axle element or a component on which the wheels 18 are arranged, or an imaginary axis on which the wheels 18 are arranged concentrically on separate axle elements. The wheel axle is arranged on the support element 15. It is conceivable for the wheel axle to be formed integrally with the support structure 15.

[0041] The motor unit 11 provides the kinetic energy to operate the pump unit 12. The motor unit 11 preferably comprises a three-phase motor. In this case, the hot water high-pressure cleaner 10 may include an interface for connecting the three-phase motor to a power source. Alternatively, the motor unit 11 may comprise an internal combustion engine. In this case, the hot water high-pressure cleaner 10 may have a tank for a fuel and a tank opening for filling.

[0042] The hose reel 14 has a substantially cylindrical geometry. The axial end sides of the hose reel 14 each have a collar element with a larger diameter than a central region of the hose reel 14. The central region of the hose reel 14 is the region in which a high-pressure hose is arranged, in particular wound, during operation. The collar elements on the axial end sides each form boundaries that hold the high-pressure hose to the central region of the hose reel 14. The central region of the hose reel 14 extends further in the axial direction than the axial end sides.

[0043] The heating unit 13a with the storage unit 13b is arranged on the support structure 15, in particular on the tray. The water stored in the storage unit 13b can be heated via the heating unit 13a. The hot water high-pressure unit 10 preferably includes a regulator for adjusting the water temperature.

[0044] Figure 2 shows a top view and Figure 3 a side view of the hot water high-pressure cleaner 10 according to Figure 1. Figures 2 and 3 show that the frame of the support structure 15 has a curved section. The curved section forms a handle element 22. The handle element 22 is intended to move the hot water high-pressure cleaner 10 in a desired direction.

[0045] Figure 2 shows the wheel axes RA and the central longitudinal axis ML of the hose reel 14. The orientation or alignment of the hose reel 14 essentially corresponds to the orientation or alignment of the wheels 18. The hose reel 14 is inclined in a direction orthogonal to the wheel axes RA of the wheels 18. More precisely, the axis of rotation or central longitudinal axis of the hose reel 14 forms an angle with a longitudinal axis of the hot water high-pressure cleaner 10. The spanned angle can be between 80° and 90°, in particular 88°. In other words, the central longitudinal axis or the axis of rotation of the hose reel 14 forms an angle with the wheel axis RA of a wheel pair. This angle can be between 1° and 10°, in particular 2°.

[0046] The hose reel 14 comprises an actuating element (not shown). The actuating element is preferably a spring element that is configured to store energy in the form of potential energy or tension energy. The tension energy indicates how much work was done when tensioning the spring element. The spring element preferably comprises at least one band spring. The spring element can, for example, be compressed or shrunk when the high-pressure hose is unrolled. In other words, when the high-pressure hose is unrolled, it is subjected to a tensile force such that the hose reel 14 rotates in a first direction about the axis of rotation. As a result, work is done on the spring element, which work is stored in the spring element in the form of tension energy. The stored energy can be used to roll the high-pressure hose onto the hose reel 14.When the tensile force is released, the tensioning energy acts in a direction opposite to the tensile force, causing the hose reel 14 to rotate. The direction of rotation of the hose reel 14 during unwinding is opposite to the direction of rotation of the hose reel 14 during winding. The hose reel 14 can have a locking device to prevent the high-pressure hose from unintentionally winding up. Furthermore, the hose reel can have a braking device to slow the rotation of the hose reel 14 and thus prevent the high-pressure hose from winding up too quickly.

[0047] The storage unit 13b has a cylindrical geometry. The storage unit can include an opening, inlet, and / or connection for filling the storage unit with water. The heating unit 13a is arranged inside the storage unit 13b. The heating unit 13a comprises spiral heating elements. The pump unit 12 is fluidly connected to the high-pressure hose and the storage unit 13b. The pump unit 12 conveys the heated water from the storage unit 13b through the high-pressure hose to a high-pressure lance. The high-pressure lance can thus generate a concentrated water jet.

[0048] Figure 3 depicts a support plane AE. The support plane AE is the plane on which the hot water high-pressure cleaner 10 rests. The hot water high-pressure cleaner 10 rests on the support plane AE with support surfaces. In the present embodiment, the support surfaces are the surface of the wheels 18, which rest on the support plane AE or touch the support plane AE. Alternatively, feet or stand elements arranged on the support structure 15 are possible.

[0049] In Figure 3, it is clearly visible from the side that the rotational axis or the central longitudinal axis ML of the hose reel 14, starting from the support plane AE, is arranged below the rotational axis of the motor unit 11. It is also evident that the center of gravity of the hose reel 14, starting from the support plane AE, is arranged below the center of gravity of the motor unit 11 and the pump unit 12. Furthermore, in the present embodiment, the center of gravity is arranged below the center of gravity of the storage unit 13b, starting from the support plane AE.

[0050] Other embodiments of the present invention are possible and can be understood and practiced by those skilled in the art when applying the claimed subject matter from a study of the figures, the disclosure, and the appended claims. In particular, the respective parts / functions of the respective embodiment described above can also be combined with each other. Furthermore, various steps of the method can be performed in a different order than disclosed here. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. The mere fact that certain measures are recited in dependent claims does not mean that a combination of these measures cannot be advantageous. Any reference signs in the claims should not be construed as limiting the scope of the claims.

[0051] List of reference symbols:

[0052] AE Uprising Level

[0053] ML central longitudinal axis

[0054] RA wheel axle

[0055] 10 hot water pressure washers

[0056] 11 Motor unit

[0057] 12 Pump unit

[0058] 13a Heating unit

[0059] 13b Storage unit

[0060] 14 hose reel

[0061] 15 Support structure

[0062] 16 long sides

[0063] 17 transverse sides 18 wheels

[0064] 19 housings

[0065] 20 front element

[0066] 21 Longitudinal bar 22 Handle element

Claims

Claims 1. Hot water high-pressure cleaner (10), the hot water high-pressure cleaner (10) comprising: a motor unit (11) for providing drive energy; a pump unit (12) for generating high pressure; a heating unit (13a) with a storage unit (13b) for providing heated water, and a hose reel (14) for receiving a high-pressure hose; the hose reel (14) being operatively connected to an actuating element such that the hose reel is automatically rotatable about a central longitudinal axis (ML) of the hose reel, at least for rolling up the high-pressure hose.

2. Hot water high-pressure cleaner (10) according to claim 1, wherein the hot water high-pressure cleaner (10) comprises a support structure (15) on which functional components of the hot water high-pressure cleaner (10) are arranged, wherein the support structure (15) has two opposite longitudinal sides (16) and two opposite transverse sides (17), wherein the hose reel (14) is arranged on the support structure (15) such that the central longitudinal axis (ML) of the hose reel is arranged at an angle between 80° and 90°, in particular 88°, to the longitudinal sides (16).

3. Hot water high pressure cleaner (10) according to one of the preceding claims, wherein the hot water high pressure cleaner (10) has at least one support surface which is arranged on a support plane, wherein in the direction of the support plane a center of gravity of the hose reel (14) is arranged below a center of gravity of the motor unit (11).

4. Hot water high-pressure cleaner according to one of the preceding claims, wherein, starting from the support plane, the rotation axis of the hose reel is arranged below a rotation axis of the motor unit.

5. Hot water high-pressure cleaner (10) according to one of the preceding claims, wherein, starting from the support plane (AE), the center of gravity of the hose reel (14) is arranged below a center of gravity of the heating unit (13a) with the storage unit (13b).

6. Hot water high-pressure cleaner (10) according to one of the preceding claims, wherein the hot water high-pressure cleaner (10), in particular the support structure (15), comprises at least one wheel axle (RA) with two oppositely arranged wheels (18) for moving the hot water high-pressure cleaner (18).

7. Hot water high pressure cleaner (10) according to one of the preceding claims, wherein the hose reel (14) is arranged on the hot water high pressure cleaner (10), in particular the support structure (15), in such a way that the central longitudinal axis (ML) of the hose reel (14) is arranged at an angle between 0° and 10°, in particular 2°, to the wheel axis (RA).

8. Hot water high-pressure cleaner according to one of the preceding claims, wherein the running direction of the wheels substantially corresponds to the running direction of the hose reel.

9. Hot water high-pressure cleaner (10) according to one of the preceding claims, wherein the actuating element comprises a spring element configured to provide a restoring force for the rotation of the hose reel (14).

10. Hot water high-pressure cleaner (10) according to one of the preceding claims, wherein the actuating element comprises an actuator configured to rotate the hose reel (14) about the central longitudinal axis (ML).

11. Hot water high pressure cleaner (10) according to one of the preceding claims, wherein the hot water high pressure cleaner (10) comprises a housing (19) which is arranged on the support structure (15) and in which the functional components are at least partially arranged.

12. Hot water high pressure cleaner (10) according to one of the preceding claims, wherein a connection for the high pressure hose is arranged on a transverse side of the hot water high pressure cleaner.

13. Hot water high-pressure cleaner (10) according to one of the preceding claims, wherein the heating unit (13a) and the storage unit (13b) are designed as a single unit.

14. Hot water high-pressure cleaner (10) according to one of the preceding claims, wherein the heating unit (13a) and / or the storage unit (13b) comprise a cylindrical geometry.

15. Hot water high pressure cleaner (10) according to one of the preceding claims, wherein the support structure (15) comprises a trough-shaped structure in which the functional components of the hot water high pressure cleaner (10) are received and / or arranged.

16. Hot water high-pressure cleaner (10) according to one of the preceding Claims, wherein the spring element is a ribbon spring or a spiral spring.

17. Hot water high-pressure cleaner (10) according to one of the preceding Claims, wherein the motor unit (11), the pump unit (12), the heating unit (13a) with the storage unit (13b) and the hose reel (14) can be handled and / or transported as a unit.

18. Use of an automatic hose reel (14) in a high-pressure cleaner, in particular in a hot-water high-pressure cleaner (10) according to one of the preceding claims, wherein the hose reel (14) is configured to automatically roll up at least a hose, in particular a high-pressure hose.

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