EP3746233B1 - High-pressure cleaning device - Google Patents

Description

The invention relates to a high-pressure cleaning device with the features of the preamble of patent claim 1.

With the help of a high-pressure cleaning device, a cleaning liquid, preferably water, can be pressurized and directed onto a surface to be cleaned. Cleaning liquid can be supplied to the pump via a liquid supply line, for example a suction hose. The cleaning liquid can be pressurized by the pump and then delivered via a liquid delivery line, for example a pressure hose. For connecting the liquid supply line, the high-pressure cleaning device can have a first connection element, and for connecting the liquid delivery line, the high-pressure cleaning device can have a second connection element. The pressurized cleaning liquid can be fed to a dispensing element, for example a spray lance or a spray gun, via the liquid delivery line. By means of the dispensing element, the pressurized cleaning liquid can be directed onto the surface to be cleaned.

In many cases, the electric motor is supplied with energy using an external voltage source, for example a public power supply network. For this purpose, the high-pressure cleaning device can have a power cable that is connected to the external power source. However, an external voltage source is not always available. In addition, handling the high-pressure cleaning device is often made more difficult by connecting it to the external power source. It is therefore, for example, from the DE 10 2008 019 524 A1 a high-pressure cleaning device is known which has at least one rechargeable battery to supply energy to the electric motor and therefore does not necessarily have to be connected to an external voltage source. The provision of at least A rechargeable battery makes handling the high-pressure cleaning device easier, but battery-operated high-pressure cleaning devices often only have a low electrical output and the cleaning liquid cannot be put under too much pressure. This affects the cleaning results that can be achieved using battery-operated high-pressure cleaning devices.

The WO 2013/121779 A2 discloses a high-pressure cleaning device that uses two rechargeable batteries. The batteries each have several battery cells that are connected in series with one another. A lower housing part of the device housing of the high-pressure cleaning device is divided by partitions into a battery chamber, a motor chamber and a pump chamber. An electric motor and control electronics are arranged in the motor chamber. A battery connection is electrically connected to the control electronics, which in turn is electrically connected to the electric motor.

From the US 5,100,058 A is a high-pressure cleaning device known with a device housing in which an electric motor and a pump driven by the electric motor are arranged. To supply energy to the electric motor, several batteries are arranged in a battery compartment of the device housing.

The US 2009/0120460 A1 discloses a pre-spray unit for carpets. The pre-spray unit has a device housing in which a pump driven by an electric motor and an electrical control device are arranged. In addition, the device housing accommodates two batteries connected in series to supply energy to the electric motor.

The object of the present invention is to develop a battery-operated high-pressure cleaning device of the type mentioned in such a way that the batteries can be replaced in a simple manner and the battery receiving device and the electric motor can be cooled in a simple manner.

This task is achieved by a high-pressure cleaning device with the features of patent claim 1.

By connecting at least two rechargeable batteries in series, the electric motor can be provided with an electrical supply voltage, which results from the sum of the output voltage of the individual batteries. This allows the use of an electric motor with a nominal voltage greater than 36 V, and this in turn allows the cleaning fluid to be placed under high pressure so that a better cleaning result can be achieved. The pressure of the cleaning liquid can be, for example, at least 70 bar, preferably at least 100 bar. When using two rechargeable batteries, the output voltage of the batteries is doubled by the series connection while the current remains the same, so that the series connection also doubles the electrical power.

In particular, it can be provided that the maximum electrical power of the high-pressure cleaning device is at least 1 kW.

The high-pressure cleaning device has a battery receiving device with a battery receiving compartment into which the batteries can be inserted and from which the batteries can be removed. This makes replacing the batteries easier.

According to the invention, the battery receiving device is arranged outside the device housing. This makes assembly of the high-pressure cleaning device easier and also has the advantage that the battery receiving device is easily accessible to the user in order to replace the batteries.

The battery receiving device is arranged above the device housing when the high-pressure cleaning device is in the upright position of use. The battery receiving device is therefore easily accessible to the user when the high-pressure cleaning device is in the upright position of use. This makes it easier for the user to replace the batteries.

The device housing has air inlet openings and an air inlet channel is arranged between the air inlet openings and the battery receiving device. Cooling air can flow into the device housing via the air inlet duct and the air inlet openings arranged on the device housing, with the cooling air also cooling the battery receiving device as it flows through the air inlet duct. Since the air inlet channel runs between the device housing and the battery receiving device, the battery receiving device reduces the risk of splash water entering the device housing via the air inlet openings.

The air inlet openings are arranged on a ceiling wall of the device housing.

A suction unit is arranged in the device housing for sucking in cooling air via the air inlet duct and the air inlet openings.

The suction unit is arranged in a motor housing that surrounds the electric motor, the motor housing having at least one air inlet. The cooling air sucked in via the air inlet duct, the air inlet openings of the device housing and the at least one air inlet of the motor housing can flow along the electric motor in order to cool it. It is particularly advantageous if the sucked-in cooling air then reaches the control housing via an air duct, so that the control electronics positioned in the control housing can also be cooled with the help of the cooling air.

It is particularly advantageous if an electrical control device is arranged in the device housing of the high-pressure cleaning device with a splash-proof control housing and control electronics positioned in the control housing, the control electronics having a voltage supply circuit, and the batteries each being connected to the voltage supply circuit via separate electrical connecting lines and by means of the Power supply circuit are connected in series with one another. In such an embodiment of the high-pressure cleaning device according to the invention, a splash-proof control housing is arranged within the device housing. The control housing is preferred as from Device housing is designed as a separate component. The control housing accommodates control electronics that include a power supply circuit. The batteries arranged outside the control housing are each connected to the power supply circuit positioned inside the control housing via separate electrical connecting lines. With the help of the voltage supply circuit, the batteries connected in series with each other, with the output voltages of the batteries being added to a supply voltage for the electric motor. The summation of the output voltages takes place within the splash-proof control housing surrounded by the device housing. The risk that the user comes into contact with the relatively high supply voltage of the electric motor if the device housing is damaged and in particular if the battery receiving device is damaged can be reduced. In addition, the requirements for the battery receiving device with regard to splash protection can be kept rather low, since no sum is formed from the output voltages of the batteries within the battery receiving device. The output voltages of the batteries are transmitted via the individual connecting lines to the voltage supply circuit arranged in the splash-proof control housing, and the sum of the output voltages is only formed in the control housing using the voltage supply circuit.

Preferably, the batteries can be inserted into the battery compartment without tools and can also be removed from the battery compartment without tools.

The batteries discharge as the high-pressure cleaning device operates. To recharge them, an internal or external charging device can be used.

If the batteries are to be connected to an external charging device, they can be removed from the battery compartment and then reinserted into the battery compartment after charging.

The high-pressure cleaning device is conveniently operated in a standing position of use in which a longitudinal axis of the device housing is aligned essentially vertically. In such a position of use, the high-pressure cleaning device only requires a relatively small footprint to set up.

It is advantageous if the pump is arranged below the electric motor in the upright position of use of the high-pressure cleaning device and the control device is positioned laterally next to the pump. The control device In such an embodiment of the invention, in the standing position of use of the high-pressure cleaning device, it is at a relatively small distance from the base of the high-pressure cleaning device. As a result, the risk of damage to the control device, in particular the risk of damage to the splash-proof control housing, can be kept low. Even if the high-pressure cleaning device tips over from its standing position of use into a lying position in which the longitudinal axis of the device housing is aligned essentially horizontally, there is practically no risk that the splash-proof control housing will be damaged.

In an advantageous embodiment of the invention, the high-pressure cleaning device has two impellers that can be rotated about a common axis of rotation. This makes it possible to easily move the high-pressure cleaning device along a floor surface. For this purpose, it can be tilted from its standing position of use around the common axis of rotation of the wheels like a sack truck, so that it can then be moved along the floor surface using the wheels.

It is advantageous if the control device is arranged adjacent to the common axis of rotation of the wheels. In particular, it can be provided that the control device is at least partially positioned between the two wheels. In such a configuration, the control device only occupies a relatively small distance from the floor surface even when the high-pressure cleaning device is moved, so that there is little risk that the control device and in particular the splash-proof control housing will be damaged if the high-pressure cleaning device accidentally tips over.

In an advantageous embodiment of the invention, a positively guided cooling air flow can flow through the control housing. This allows the control electronics arranged in the control housing to be effectively cooled.

It is particularly advantageous if the control housing is in flow connection with the motor housing of the electric motor via at least one air duct, with cooling air sucked into the motor housing being able to be fed to the control housing via the at least one air duct. According to the invention, a suction unit is arranged within the motor housing for sucking in cooling air from the environment of the high-pressure cleaning device. The sucked-in cooling air can flow along the electric motor for cooling and can reach the control housing via the at least one air duct, so that the control electronics positioned in the control housing can also be cooled by the cooling air. The cooling air can escape from the control housing via at least one air outlet opening.

The at least one air outlet opening is preferably arranged on a bottom wall of the control housing, which is arranged below the control electronics positioned in the control housing in the vertical position of use of the high-pressure cleaning device.

In a preferred embodiment of the invention, the batteries of the high-pressure cleaning device are held in a releasably lockable manner in the battery receiving compartment. This can prevent an unintentional change in position of the batteries in the battery compartment.

It is advantageous if the battery receiving device has a plurality of locking elements, each of which can be moved back and forth between a locking position and a release position, with the locking elements each being assigned a battery and an actuating element and the locking elements being moved out of the locking position by actuating the respectively assigned actuating element the release position can be moved. With such an embodiment of the invention, the batteries can each be locked individually in the battery compartment. A locking element is used for this purpose. Each locking element is assigned a separate actuating element, by actuating which the Locking element can be moved from the locking position into a release position, so that the battery can then be easily removed from the battery compartment. The batteries can thus be removed one after the other from the receiving compartment, with one actuating element having to be actuated for removal.

By providing the movable locking elements, it is not necessary for the batteries to have movable parts in order to secure the batteries in the battery receiving compartment. The manufacturing costs of the batteries can thereby be reduced and the susceptibility of the batteries to faults can also be kept low.

It can be provided that the locking elements protrude from a wall of the battery compartment in their locking position. In their locking position, the locking elements can dip into a receptacle of the respective assigned battery and fix the battery. In their release position, the locking elements can release the holder of the respective battery, so that the battery can be removed from the battery compartment without being hindered by the associated locking element.

It is advantageous if the locking elements are spring-elastically preloaded into their locking position. Under the effect of the preload acting on them, the locking elements automatically assume their locking position, and by actuating the respective associated actuating element, the locking elements can be moved into the release position against the preload acting on them.

It is advantageous if the locking elements can be moved from the locking position into the release position against a resilient restoring force by inserting the batteries into the battery receiving compartment. This makes it easier to insert and secure the batteries into the battery compartment. The locking elements that initially assume their locking position become from the respectively assigned battery, when it is inserted into the battery compartment, moves into its release position against a resilient restoring force. When the batteries have reached their end position in the battery compartment, the locking elements are moved back into their locking position under the action of the resilient restoring force, each locking a battery in the battery compartment.

It can be provided that the locking elements each have a locking hook. The locking hook can dip into an associated receptacle of the battery to secure the battery in the battery compartment. Alternatively or additionally, the locking hook can engage behind a locking projection on the battery.

The actuating elements preferably have a push button. This makes it easier to operate the actuating element.

It is particularly advantageous if the push button can be pressed downwards essentially vertically in the vertical position of use of the high-pressure cleaning device in the direction of its base. This has the advantage that the stability of the high-pressure cleaning device is not affected by the actuation of the actuating element.

In an advantageous embodiment of the invention, the actuating elements each interact with a locking element via a driver, for example an inclined surface.

The actuating elements can, for example, be displaceable in a straight line in a sliding direction, preferably essentially vertically downwards in the standing position of use of the high-pressure cleaning device, whereby they each contact a driver which transmits the movement of the actuating element to a locking element, so that the locking element is removed from the Locking position moved into the release position.

It is advantageous if each driver is rigidly connected to a locking element.

For example, it can be provided that each driver forms a one-piece plastic molding together with a locking element.

As already mentioned, it is advantageous if the locking elements each have a locking hook.

The locking hook can be connected in one piece to a driver.

Particularly simple handling when replacing the batteries is achieved in an advantageous embodiment in that the battery receiving device has a plurality of output elements, each of which is assigned to a battery, the batteries inserted into the battery receiving compartment being movable by the respective associated output element in the direction opposite to the direction of insertion, when the locking element assigned to the batteries assumes its release position. In order to remove a battery from the battery compartment, the user must operate the actuating element assigned to the battery in such an embodiment of the invention. This results in the locking element associated with the battery being moved from its locking position into its release position, and this in turn results in the battery being moved by the associated output element in the direction opposite to the insertion direction. After the actuation element has been actuated, the user can easily grasp the battery moved by the output element by hand and completely remove it from the battery compartment. The provision of the output elements, in combination with the provision of the actuation and locking elements, enables one-handed operation such that the user can grasp a battery with one hand and insert it into the battery receiving compartment, with the battery being fixed in its end position in the battery receiving compartment, and the user can the inserted battery with one hand in the battery compartment removed by first activating the actuating element assigned to the battery and then grabbing the battery and removing it from the battery compartment.

When the batteries reach their end position in the battery receiving compartment, the respective associated output element can preferably be acted upon by a spring force that is directed opposite to the direction of insertion. In the end position, the batteries are secured by the associated locking element. If the locking element is moved from its locking position into its release position by actuating the associated actuating element, the battery is moved in the direction opposite to the insertion direction under the effect of the spring force exerted by the output element.

The output elements can, for example, have an output spring which is tensioned when the battery is inserted and thus applies a spring force to the battery, under the action of which it is moved in the direction opposite to the direction of insertion after an actuation of an actuating element.

The batteries can preferably be inserted into the battery receiving compartment in the upright position of use of the high-pressure cleaning device in the direction of the base of the high-pressure cleaning device. When inserting the batteries into the battery compartment, the high-pressure cleaning device is only subjected to a force directed towards the standing surface, so that the stability of the high-pressure cleaning device is affected by the insertion the batteries are not affected. The batteries can be inserted into the battery compartment essentially in a vertical direction from top to bottom.

In a preferred embodiment of the invention, the battery receiving device has a receiving trough which surrounds the battery receiving compartment and can be closed by means of a lid.

The lid is conveniently pivotably mounted on the receiving tray.

The pivot axis of the lid is conveniently aligned horizontally when the high-pressure cleaning device is in the upright position of use.

It is particularly advantageous if the lid is biased towards a closed position of the lid. This makes it easier to handle the high-pressure cleaning device when replacing a battery, since the cover automatically assumes its closed position due to the preload acting on it, provided it is not being held by the user.

The high-pressure cleaning device preferably has a first connection element for connecting a liquid supply line and a second connection element for connecting a liquid delivery line, the two connection elements being arranged on a front side of the high-pressure cleaning device.

The air inlet duct is preferably arranged on a rear side of the high-pressure cleaning device. This means that the risk of splash water penetrating the device housing via the air inlet duct and the air inlet openings can be kept particularly low.

In an advantageous embodiment of the invention, the high-pressure cleaning device has a U-shaped push bar with two push rods and a handle connecting the push rods to one another, the push bar being mounted on the device housing so that it can be moved back and forth between a parking position and an operating position. In the parking position, the handle is at a smaller distance from the device housing than in the operating position. In the operating position, the handle can be easily grasped by the user to move the high-pressure cleaning device. Should If the high-pressure cleaning device is started in a standing position of use, the push bar can be moved into the parking position so that it does not hinder further handling of the high-pressure cleaning device.

It is particularly advantageous if the handle and preferably also the end regions of the push rods facing the handle are arranged laterally next to the battery receiving device in the parking position of the push bar. This has the advantage that the handle and in particular the end sections of the push rods protect the battery device from damage if the high-pressure cleaning device tips over.

Figur 1:

eine erste perspektivische Darstellung eines Hochdruckreinigungsgeräts in einer stehenden Gebrauchsstellung, in der es auf einer Standfläche abgestellt ist, wobei ein Schubbügel eine Bedienposition einnimmt;

Figur 2:

eine zweite perspektivische Darstellung des Hochdruckreinigungsgeräts aus Figur 1, wobei der Schubbügel eine Parkposition einnimmt;

Figur 3:

eine perspektivische, teilweise aufgetrennte Darstellung des Hochdruckreinigungsgeräts aus Figur 1, wobei der Schubbügel ausgeblendet ist;

Figur 4:

eine Schnittansicht einer Motorpumpeneinheit und einer Steuereinrichtung des Hochdruckreinigungsgeräts aus Figur 1;

Figur 5:

eine Seitenansicht der Motorpumpeneinheit und der Steuereinrichtung aus Figur 4;

Figur 6:

eine Vorderansicht einer Batterieaufnahmeeinrichtung des Hochdruckreinigungsgeräts aus Figur 1, wobei ein Deckel der Batterieaufnahmeeinrichtung eine Offenstellung einnimmt;

Figur 7:

eine Schnittansicht der Batterieaufnahmeeinrichtung aus Figur 6;

Figur 8:

eine vergrößerte Darstellung von Detail X aus Figur 7;

Figur 9:

eine schematische Darstellung einer Steuerelektronik des Hochdruckreinigungsgeräts aus Figur 1.

The following description of an advantageous embodiment of the invention serves to provide a more detailed explanation in conjunction with the drawing. Show it:

Figure 1:

a first perspective view of a high-pressure cleaning device in a standing position of use, in which it is placed on a base, with a push bar assuming an operating position;

Figure 2:

a second perspective view of the high-pressure cleaning device Figure 1 , with the push bar assuming a parking position;

Figure 3:

a perspective, partially separated view of the high-pressure cleaning device Figure 1 , with the push bar hidden;

Figure 4:

a sectional view of a motor pump unit and a control device of the high-pressure cleaning device Figure 1 ;

Figure 5:

a side view of the motor pump unit and the control device Figure 4 ;

Figure 6:

a front view of a battery receiving device of the high-pressure cleaning device Figure 1 , wherein a cover of the battery receiving device assumes an open position;

Figure 7:

a sectional view of the battery receiving device Figure 6 ;

Figure 8:

an enlarged view of detail X Figure 7 ;

Figure 9:

a schematic representation of control electronics of the high-pressure cleaning device Figure 1 .

In the Figures 1 to 3 an advantageous embodiment of a high-pressure cleaning device 10 according to the invention is shown schematically in a standing position of use, in which the high-pressure cleaning device 10 is placed on a standing surface 12. The high-pressure cleaning device 10 has a device housing 14 which surrounds a motor pump unit 16 and a control device 18 and on which a first impeller 20 and a second impeller 22 are mounted. The two impellers 20, 22 can be rotated about a common axis of rotation 24 to move the high-pressure cleaning device 10. A first connection element 26, like a second connection element 28, protrudes from the device housing 14. A liquid supply line, in particular a suction hose, can be connected to the first connection element 26, and a liquid delivery line, in particular a pressure hose, can be connected to the second connection element 28.

The device housing 14 has a front side 30 and a back side 32 and includes a bottom wall 34 and a top wall 36 as well as a first side wall 38 and a second side wall 40. At the center of the front side 30 is a substantially vertically aligned position in the upright position of use of the high-pressure cleaning device 10 Carrying handle 42 arranged on which A main switch 44 of the high-pressure cleaning device 10, designed as a rotary switch, connects in the direction of the ceiling wall 36.

The ceiling wall 36 has air inlet openings 46 through which cooling air can flow into the device housing 14. This will be in particular Figure 2 clearly.

A battery receiving device 48 is arranged on the device housing 14. The battery receiving device 48 has a receiving housing 50, which is formed by a receiving trough 52 and a cover 54. The cover 54 is pivotally mounted on the receiving trough 52 and can be pivoted about a pivot axis 56, which is aligned horizontally and essentially perpendicular to the side walls 38, 40 in the standing position of use of the high-pressure cleaning device 10. In the Figures 1 to 3 the lid 54 assumes a closed position in which it covers the receiving tray 52 and in the Figures 6 and 7 the lid 54 assumes an open position in which it releases the receiving tray 52.

The receiving trough 52 has a trough base 58, which is adjoined by a circumferential outer wall 60, which is essentially vertically aligned in the standing position of use of the high-pressure cleaning device 10.

Like in particular Figure 2 becomes clear, the tub base 58 is at a distance from the top wall 36 of the device housing 14. An air inlet duct 62 extends between the tub floor 58 and the ceiling wall 36, via which cooling air can reach the air inlet openings 46 in the ceiling wall 36. The two connection elements 26, 28 are arranged on the front of the device housing 14, and the air inlet duct 62 opens to the back of the device housing 14.

The motor pump unit 16 has an electric motor 64 which is surrounded by a motor housing 66. In addition, the motor pump unit 16 has one in the vertical position of use of the high-pressure cleaning device 10 below of the electric motor 64 arranged pump 68, which is driven by the electric motor 64 via a gear 70 arranged between the electric motor 64 and the pump 68.

The control device 18 is arranged within the device housing 14 between the pump 68 and the back 32 of the device housing 14. The control device 18 has a splash-proof control housing 72, in which control electronics 74 is arranged for controlling the electric motor 64. The control housing 72 is designed as a separate component that is surrounded by the device housing 14. The control device is adjacent to the axis of rotation 24 and is largely arranged between the two wheels 20, 22.

The control housing 72 is in fluid communication with the motor housing 66 via an air duct 76. The motor housing 66 has two air inlets 78, 79 below the air inlet openings 46 of the device housing 14, to which a suction unit 82 is connected within the motor housing 66 and is non-rotatably connected to the motor shaft 80 of the electric motor 64, with the help of which cooling air can be sucked into the motor housing 66 . The air inlet 78 faces the front 30 of the device housing 14 and the air inlet 79 faces the back 32 of the device housing 14. The air inlet duct 62, in combination with the air inlet openings 46 and the air inlets 78, 79, thus forms a kind of flow labyrinth for the cooling air.

On the side of the electric motor 64 facing away from the suction unit 82, a fan wheel 84 is arranged within the motor housing 66, with the help of which the cooling air sucked in by the suction unit 82 can be blown via the air duct 76 to the control housing 72. The air duct 76 covers upper housing openings 86 of the control housing 72, through which the cooling air can flow into the control housing 72. Lower housing openings 90 are arranged on a bottom 88 of the control housing 72, through which the Cooling air can flow out of the control housing 72. The cooling air flow is in Figure 4 shown schematically by arrows 77.

Like in particular Figure 9 As becomes clear, the control electronics 74 has a motor control unit 92, which is connected to the electric motor 64 via output lines 94. In addition, the control electronics 74 has a control unit 96, which is connected to the motor control unit 92 via a first voltage supply line 98 and a second voltage supply line 100 as well as via a control line 102 and which has a voltage supply circuit 104. The control unit 96 is also in electrical connection via a pressure signal line 106 with a pressure switch 108, which provides the control unit 96 with a control signal that is dependent on the pressure prevailing in the area of the second connection element 28. As already mentioned, a liquid delivery line can be connected to the second connection element 28. The liquid delivery line can carry at its free end a dispensing device for the cleaning liquid that can be manually closed by the user, for example a spray gun. If the dispensing element is closed by the user, the pressure of the cleaning liquid increases in the area of the second connection element. A corresponding control signal can then cause the control unit 96 to switch off the electric motor. If the dispensing element is opened again by the user, the pressure of the cleaning liquid drops in the area of the second connection element, and a corresponding control signal can then cause the control unit 96 to switch the electric motor on again. In addition, a display device 110 is connected to the control unit 96.

The electric motor 64 is supplied with energy via a first rechargeable battery 112 and a second rechargeable battery 114, which can be inserted into a battery receiving compartment 116 formed by the receiving trough 52 of the battery receiving device 48. The first battery 112 is in electrical connection with the voltage supply circuit 104 via first connecting lines 118, 120 and the second battery 114 is in electrical connection with the voltage supply circuit via separate second connecting lines 122, 124 104 in electrical connection. The output voltage of the first battery 112 is provided to the voltage supply circuit 104 via the first connecting lines 118, 120, and the output voltage of the second battery 114 is provided to the voltage supply circuit 104 via the second connecting lines 122, 124. The batteries 112, 114 are connected in series to one another by means of the voltage supply circuit 104, and the sum of the output voltages of the two batteries 112, 114 resulting from the series connection is provided by the voltage supply circuit 104 via the voltage supply lines 98, 100 to the motor control unit 92.

An inner wall 126 is positioned between a rear wall section 125 of the outer wall 60 of the receiving trough 52 and the battery receiving compartment 116. Between the inner wall 126 and the outer wall 60 there is an intermediate space 128 which is delimited on its upper side facing away from the tub floor 58 by a connecting wall 130 which connects the inner wall 126 to the outer wall 60.

To lock the two batteries 112, 114, two identically designed locking elements are arranged in the intermediate space 128, each of which is assigned to a battery 112 or 114, with only one locking element 132 being shown schematically in the drawing. The locking element 132 has a locking hook 134, which passes through an opening 136 in the inner wall 126 and is connected in one piece to a driver 138, which forms an inclined surface 140. The latching hook 134 is fixed to the inside 144 of the inner wall 126 facing the intermediate space 128 via a return spring 142 designed as a leaf spring.

Two identically designed actuating elements 146, 148 are movably mounted on the connecting wall 130, each of which is assigned to a battery 112 or 114 and each of which forms a push button 150. The push button 150 has a guide shaft 152 which has a guide opening 154 passes through the connecting wall 130 and slides against the inclined surface 140 with its end immersed in the intermediate space 128.

In the standing position of use of the high-pressure cleaning device 10, the actuating elements 146, 148 can each be acted upon with an essentially vertically oriented actuating force, that is to say with an actuating force directed onto the standing surface 12. The respective push button 150 of the actuating elements 146, 148 is pressed downwards, so that the respective guide shaft 152 moves into the intermediate space 128. This has the result that the driver 138 and with it the locking hook 134 are moved out of their position Figures 7 and 8th The locking position shown is moved into a release position, this movement taking place counter to the spring force which is exerted by the return spring 142 on the locking hook 134. In the locking position, the locking hook protrudes into the battery receiving compartment 116, and in the release position, the locking hook 134 completely releases the battery receiving compartment 116.

The identically designed batteries 112, 114 each have a latching receptacle 156 into which the latching hook 134 is immersed in its locking position, so that the respective battery 112 or 114 is fixed in the battery receiving compartment 116. To remove the battery, the user can actuate the respectively assigned actuating element 146, 148, so that the locking hook 134, which dips into the locking receptacle 156, is moved into its release position against the spring force of the return spring 142, in which it releases the locking receptacle 156.

In order to make it easier to remove the batteries 112, 114 after actuating the respective actuating element 146, 148, dispensing elements are arranged on the trough bottom 58 of the receiving housing 50, each of which is assigned to a battery 112 or 114. The output elements are designed identically and each form an output spring 158, which is clamped between the tub base 58 and the respective battery 112, 114 when the associated battery 112 or 114 is inserted. In inserted condition Therefore, the batteries 112, 114 are each subjected to an output force which is directed essentially vertically upwards in the standing position of use of the high-pressure cleaning device 10. If the user wants to remove a battery 112, 114 from the battery receiving compartment 116, he or she actuates the actuating element 146, 148 assigned to the battery, so that the locking element 132, which interacts with the actuating element 146, 148, releases the desired battery 112, 114 and the battery 112 , 114 is then moved essentially vertically upwards under the action of the output spring 158 in the direction opposite to the insertion direction. The battery is thus lifted and can then be easily grasped by the user with one hand.

In the exemplary embodiment shown, the output voltage of the two batteries 112, 114 is 36 V when charged. By connecting the batteries 112, 114 in series, a supply voltage of 72 V can be provided to the electric motor 64. This allows the cleaning liquid to be placed under a pressure of at least 70 bar, preferably under a pressure of at least 100 bar, by means of the pump 68 driven by the electric motor 64.

Since the output voltages of the two batteries 112, 114 are not already connected in series in the battery receiving device 48 but only in the control housing 72, there is little risk that the user will be out of series connection in the event of damage to the battery receiving device 48 or the device housing 14 resulting total voltage comes into contact.

The risk of damage to the control housing 72 is low since it is arranged adjacent to the common axis of rotation 24, occupying a position between the pump 68 and the rear side 32. Should the high-pressure cleaning device 10 tip over from its standing position of use, so there is practically no risk that the control housing 72 will be damaged.

As already mentioned, the high-pressure cleaning device 10 can be moved by means of the two impellers 20, 22. In order to facilitate the process, the high-pressure cleaning device 10 has a U-shaped push bar 160, which has a first push rod 162 and a second push rod 164, which are slidably mounted on the device housing 14 and which are rigidly connected to one another via a handle 166. The push bar 160 can be between one in Figure 1 operating position shown and one in Figure 2 shown parking position can be moved back and forth. In the operating position, the distance between the handle 166 and the device housing 14 is greater than in the parking position. In the park position, the handle 166 and the end regions of the two push rods 162, 164 facing the handle 166 are arranged laterally next to the battery receiving device 48. Should the high-pressure cleaning device 10 tip over backwards from its standing position of use, the handle 166 and the end regions of the push rods 162, 164 facing the handle 166 protect the battery receiving device 48, in particular the receiving housing 50, from damage.

Claims (9)

1. High-pressure cleaning appliance with an appliance housing (14) in which an electric motor (64) and a pump (68) driven by the electric motor (64) are arranged, and with at least one rechargeable battery (112, 114) for supplying energy to the electric motor (64), wherein the high-pressure cleaning appliance (10) comprises at least two rechargeable batteries (112, 114) which are connected in series with each other, and wherein the high-pressure cleaning appliance (10) comprises a battery receptacle device (48) with a battery receiving compartment (116) into which the batteries (112, 114) are insertable and from which the batteries (112, 114) are removable, characterized in that the battery receptacle device (48) is arranged outside of the appliance housing (14), wherein the battery receptacle device (48) is arranged above the appliance housing (14) in a standing use position of the high-pressure cleaning appliance (10), and in that the appliance housing (14) comprises air inlet openings (46) and an air inlet duct (62) is arranged between the air inlet openings (46) and the battery receptacle device (48), wherein the air inlet openings (46) are arranged on a top wall (36) of the appliance housing (14), wherein a suction assembly (82) is arranged in the appliance housing (14) for suctioning cooling air via the air inlet duct (62) and the air inlet openings (46), and wherein the suction assembly (82) is arranged in a motor housing (66) which surrounds the electric motor (64) and comprises at least one air inlet (78, 79).
2. High-pressure cleaning appliance in accordance with Claim 1, characterized in that arranged in the appliance housing (14) is an electric control device (18) with a splashproof control housing (72) and an electronic control system (74) positioned in the control housing (72), wherein the electronic control system (74) comprises a voltage supply circuit (104), and wherein the batteries (112, 114) are each connected to the voltage supply circuit (104) by way of separate electric connecting lines (118, 120; 122, 124) and are connected in series with each other by means of the voltage supply circuit (104).
3. High-pressure cleaning appliance in accordance with Claim 2, characterized in that the pump (68) is arranged beneath the electric motor (64) in a standing use position of the high-pressure cleaning appliance (10), and in that the control device (18) is arranged laterally next to the pump (68).
4. High-pressure cleaning appliance in accordance with Claim 2 or 3, characterized in that the high-pressure cleaning appliance (10) comprises two wheels (20, 22) which are rotatable about a common rotational axis (24) and the control device (18) is arranged adjacent to the common rotational axis (24).
5. High-pressure cleaning appliance in accordance with any one of Claims 2 to 4, characterized in that the control housing (72) is configured to be flowed through by a forcibly guided cooling air flow.
6. High-pressure cleaning appliance in accordance with Claim 5, characterized in that the control housing (72) is in flow connection with the motor housing (66) by way of at least one air guide duct (76), wherein cooling air suctioned into the motor housing (66) is suppliable to the control housing (72) by way of the at least one air guide duct (76).
7. High-pressure cleaning appliance in accordance with any one of the preceding Claims, characterized in that the batteries (112, 114) are insertable into the battery receiving compartment (116) in the direction toward a standing surface (12) of the high-pressure cleaning appliance (10) in the standing use position of the high-pressure cleaning appliance (10).
8. High-pressure cleaning appliance in accordance with any one of the preceding Claims, characterized in that the high-pressure cleaning appliance comprises a first connecting element (26) for connecting a liquid supply conduit and a second connecting element (28) for connecting a liquid dispensing conduit, wherein the two connecting elements (26, 28) are arranged on a front side (30) of the high-pressure cleaning appliance (10), and wherein the air inlet duct (62) is arranged on a rear side of the high-pressure cleaning appliance (10).
9. High-pressure cleaning appliance in accordance with any one of the preceding Claims, characterized in that the high-pressure cleaning appliance (10) comprises a U-shaped push handle (160) with two push rods (162, 164) and a hand grip (166) connecting the push rods (162, 164) to each other, wherein the push handle (160) is mounted on the appliance housing (14) so as to be displaceable back and forth between a parking position and an operating position, and wherein the hand grip (166) in the parking position is arranged laterally next to the battery receptacle device (48).

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