WO2020048851A1

WO2020048851A1 - Hot water-cleaning device and method for operating a hot water-cleaning device

Info

Publication number: WO2020048851A1
Application number: PCT/EP2019/073007
Authority: WO
Inventors: Benjamin KUTZ; Michael SCHÖNEWALD; Dimitri GÄRTNER; Jonas GROSS
Original assignee: Alfred Kärcher SE & Co. KG
Priority date: 2018-09-07
Filing date: 2019-08-28
Publication date: 2020-03-12
Also published as: DE102018121922A1; EP3846949A1; JP2021536355A; CN112638553A

Abstract

The invention relates to a hot water-cleaning device which comprises a throughflow heater (14) with a heating device (16), a nozzle device (34) for spraying hot water, a pump (26) which is fluidically connected to the throughflow heater (14), and a connection (42) for a battery device (40) and/or a battery device (40) which provides electric energy for operating the heating device (16), wherein the heating device (16) is operated such that the throughflow heater (14) provides hot water without a water-steam phase transition.

Description

Hot water cleaning device and method of operation

of a hot water cleaning device

The invention relates to a hot water cleaning device.

The invention further relates to a method for operating a hot water cleaning device.

DE 41 01 186 A1 discloses a high-pressure cleaner with a pressure vessel and a pump, cleaning fluid being able to be supplied under pressure to a spray lance or a nozzle. A heating device is connected upstream and / or downstream of the pressure container or the pump.

DE 10 2008 009 221 A1 discloses a system for storing and dispensing liquid cleaning additive for high-pressure cleaning devices.

DE 10 2012 215 746 A1 discloses a lance for a high-pressure cleaner.

EP 0 054 203 A1 discloses a steam sprayer and a method for providing a volatile fluid as a steam spray.

WO 03/064224 A1 discloses a fluid heating device which provides washing fluid via a continuous labyrinth flow path in a thermally conductive body. A heat source is arranged in the thermally conductive body.

CN 105772437 discloses a high-pressure cleaner with solar operation.

A steamer is known from WO 2015/103600 A1.

WO 2017/179080 A1 discloses a device for generating fog. Steam generating devices are described in PCT / EP2017 / 055806, PCT / EP2017 / 055790 and PCT / EP2017 / 055797.

The invention has for its object to provide a hot water cleaning device that can be operated effectively.

This object is achieved according to the invention in the hot water cleaning device mentioned at the outset in that a flow heater is provided with a heating device, a pump is provided which is fluidly connected to the flow heater, a nozzle device for spraying hot water is provided, and a connection for a battery device and / or a battery device, which provides electrical energy for operating the heating device, is provided, the heating device being operated in such a way that the continuous-flow heater provides hot water without a vapor phase transition.

Hot water can be sprayed through the nozzle device. There is an effective cleaning effect for a surface to be cleaned.

The hot water cleaning device is operated so that there is no phase transition. This results in an energy-saving mode of operation and a cleaning process can be carried out with a battery device.

As a result, the hot water cleaning device is not connected to the mains and can be operated "independently" in a simple and advantageous manner.

It results, for example, from the heating of water

Temperature from 20 ° C to 70 ° C compared to heating from 20 ° C to 140 ° C (with the generation of steam) an energy saving of approximately 90%.

It has been shown that effective cleaning is also possible with hot water with the appropriate spray pattern.

Using a water heater results in rapid heating and also a low weight for hot water cleaning device. In particular, an autarkic hand-held or hand-held hot water cleaning device can be easily realized.

The pump allows water to be conveyed to the instantaneous water heater. The pump can also be used to establish and regulate the required operating pressure in the hot water cleaning device.

It is expedient if hot water provided by the continuous-flow heater at an operating pressure has a temperature in the range between 50 ° C. and 95 ° C. and in particular has a temperature in the range between 65 ° C. and 75 ° C. The hot water cleaning device is operated in such a way that there is no phase transition to steam at the corresponding operating pressure.

The operating pressure is in particular in the range between 3 bar and 4 bar and in particular in the range between 3.3 bar and 3.7 bar.

In a specific embodiment, the hot water cleaning device is operated at an operating pressure of approximately 3.5 bar. Hot water provided by the instantaneous water heater has a temperature in particular in the range between 69 ° C. and 73 ° C.

It is particularly advantageous if a flow path for hot water between an outlet of the instantaneous water heater and a valve has a length of at most 20 cm and in particular at most 15 cm and in particular of at most 10 cm and in particular of at most 9 cm. As a result, excessive cooling of hot water between the outlet of the instantaneous water heater and the nozzle device is largely avoided. In addition, water losses within the device can be avoided. The valve is in particular a valve which is controllable for dispensing hot water.

In one embodiment, the nozzle device is based on a

Flow direction upstream of a valve. The valve is especially over an operator operable. He can then activate or block the spraying of hot water by appropriately controlling the valve (for example via a switch). This results in simple operation.

G It is advantageous if the pump is connected upstream of the instantaneous water heater.

The battery device advantageously also provides electrical energy for operating the pump. In particular, it is advantageous if the battery device provides the entire electrical energy for operating the hot water cleaning device.

In one exemplary embodiment, a storage container device for water is provided, with a pump conveying water from the storage container device to the continuous-flow heater in one operating mode. The reservoir device provides a tank for water or forms a tank. If this is arranged on the hot water cleaning device, it can be operated independently.

In one embodiment, a decalcifying device is assigned to the storage container device. This is designed, for example, as an ion exchanger. As a result, the maintenance effort or descaling effort for the overall system can be kept low.

In one embodiment, a level sensor is assigned to the reservoir device. It can then be determined how much water is still available in the corresponding reservoir. This can prevent operation, for example, when the fill level is too low.

In one embodiment, a check valve is provided, which is arranged in a fluid flow path between a pump and the nozzle device. The shut-off valve can ensure that no fluid can be released to the outside if irregularities occur. In one exemplary embodiment, the shut-off valve is coupled to a return line which leads to a storage container device for water, wherein in a shut-off mode of the shut-off valve an escape of fluid at the nozzle device is blocked and water is conveyed through the return line into the storage container device. This enables a type of water cycle to be implemented, preventing water from escaping.

In particular, the check valve is designed as a safety valve. If, for example, an upper pressure threshold is exceeded, this enters the blocking mode and fluid is prevented from escaping at the nozzle device.

It is expedient if a sensor device is provided which

at least one of the following comprises: a pressure sensor, which determines an operating pressure in the fluid; a temperature sensor which determines a temperature for heated fluid; a level sensor, which determines a level on a storage container device for water.

This results in an optimized mode of operation. In particular, the hot water cleaning device can be controlled or regulated via the pressure sensor and the temperature sensor in such a way that hot water is produced without a vapor phase transition. The (at least one) temperature sensor is arranged, for example, in the area of the instantaneous water heater. It determines, for example, a temperature on the outside of the instantaneous water heater, whereupon the temperature in the (hot) fluid can be inferred. Advantageously, a control and / or regulating device is provided which controls at least one of the following: the heating device, the pump, the control and / or regulating device being connected to a sensor device in a signal-effective manner and control signals on the basis of sensor signals from the sensor device determined.

In particular, the control and / or regulating device determines

Control signals based on sensor signals from a pressure sensor, which determines an operating pressure in fluid, and based on

Temperature signals, which are determined by a temperature sensor on the continuous-flow heater (and in particular on hot water), are determined. As a result, the system can be regulated so that hot water is produced without a phase transition. Furthermore, a corresponding flow of hot water at the nozzle device can also be set to an optimized value, in particular based on the design of the nozzle device.

It is favorable if the nozzle device is designed for a flow of hot water in the range between 20 ml / min and 90 ml / min. This results in an optimized cleaning result in an autonomous mode of operation (with a battery device and a storage container device for water arranged on the device).

It is particularly advantageous if the nozzle device is or comprises a nebulizing nozzle. For example, the atomizing nozzle is designed in the form of an oil burner nozzle or hollow cone nozzle. It results in a Optimized spray pattern for cleaning purposes with a relatively moderate flow of hot water and with self-sufficient operation.

It is possible for the nozzle device to be arranged and designed such that hot water can be applied directly to a surface to be cleaned.

As an alternative or in addition, it is possible for the nozzle device to be arranged and designed such that hot water can be applied to a cleaning tool and in particular a cleaning brush or (textile) cleaning roller. This results in optimized cleaning options.

It is expedient if a housing is provided, in which the flow heater and a pump are arranged, the connection for the

Battery device and / or the battery device are arranged on or in the housing. This allows, for example, a hand-held or hand-held or self-propelled and self-steering device to be implemented. The result is a compact design. In particular, a storage container device for water is arranged on or in the housing.

In one embodiment, the hot water cleaning device is designed as a hand-held or hand-held device. It can, for example, be held in the manner of a pistol in an operator's hand, or it is possible to guide the hot water cleaning device manually over a surface to be cleaned, such as a floor.

It is also possible that the hot water cleaning device is designed to be self-propelled and self-steering and in particular as a cleaning robot.

The instantaneous water heater can have a straight or curved shape and can in particular be adapted to a housing and follow the course of a housing part. This results in an optimized use of installation space. Furthermore, the invention provides a method for operating a hot water cleaning device and, in particular, hot water cleaning device according to the invention, in which electrical energy is provided for operation by a battery device, hot water is provided on a continuous-flow heater with heating device, and the pump and / or the heating device can be controlled in such a way that hot water is provided on the instantaneous heater without a vapor phase transition.

The method according to the invention has the advantages already explained in connection with the hot water cleaning device according to the invention.

In particular, an operating pressure is measured on the fluid and a temperature for heated fluid (for example on the instantaneous water heater) is measured and, based on corresponding measurement signals, the pump and / or the heating device are controlled accordingly in order to generate hot water without a vapor phase transition.

In particular, the hot water generated is sprayed through a nozzle device.

The following description of preferred embodiments serves in conjunction with the drawings to explain the invention in more detail. Show it :

Figure 1 schematically shows an embodiment of an inventive

Hot water cleaning devices in block diagram representation;

FIG. 2 shows a sectional view of an exemplary embodiment of a hot water cleaning device according to the invention in the form of a hand-held device;

FIG. 3 shows a further exemplary embodiment of a hand-held hot water cleaning device in a sectional view; FIG. 4 shows a further exemplary embodiment of a hand-held hot water cleaning device in a sectional view;

Figure 5 shows another embodiment of a hand-held or hand-held hot water cleaning device in a sectional view;

Figure 6 shows another embodiment of a hand-held or hand-held hot water cleaning device;

FIG. 7 shows an exemplary embodiment of a hand-held hot water cleaning device in the form of a mop;

FIG. 8 schematically shows a further exemplary embodiment of a hot water cleaning device according to the invention, which is hand-guided;

FIG. 9 schematically shows an exemplary embodiment of a hot water

Cleaning device in a sectional view in the form of a cleaning robot; and

Figure 10 shows another embodiment of a hot water cleaning device as a floor-mounted cleaning device.

An exemplary embodiment of a hot water purification device according to the invention, which is shown schematically in FIG. 1 and is designated by 10, comprises a housing 12. A flow heater 14 is arranged in the housing 12. The instantaneous water heater 14 comprises a heating device 16. The heating device 16 is designed, for example, as a resistance heating device. The instantaneous heater 14 can be flowed through with water, which can be heated on the instantaneous heater 14.

A temperature sensor 18 is arranged on the water heater 14. This includes, for example, an NTC resistor. Via the temperature sensor 18 a fluid temperature of heated fluid can be determined in the area of the continuous-flow heater 14. The temperature sensor 18 determines, for example, an outside temperature on a tube of the instantaneous water heater 14, this outside temperature correlating with the temperature in the fluid.

A storage container device 20 for water is arranged in the housing. The reservoir device 20 is removably arranged on the housing 12, or it is fixedly arranged on the housing 12. With a fixed arrangement on the housing, it can be filled accordingly, even when fixed to the housing 12.

In principle, it is also possible for the storage container device 20 to be arranged outside the housing 12 and to be connectable to it.

The reservoir device 20 takes water for supply to the

Instantaneous water heater 14 and heating there.

In one embodiment, the reservoir device 20 is assigned a fill level sensor 22. This determines a level of water in the storage container device 20.

In one embodiment, a descaling device 24 is assigned to the storage container device 20. This is designed, for example, as an ion exchanger. As a result, water which is located in the storage container device 20 or is then supplied to the instantaneous water heater 14 can be decalcified.

A pump 26 is arranged in the housing 12. This is fluidly connected to the reservoir device 20 and to the flow heater 14. The pump 26 serves to convey water from the reservoir device 20 to the water heater 14. The pump 26 also provides for the setting of a (fluid) operating pressure in the fluid system of the hot water cleaning device 10.

A pressure sensor 28 is arranged in the housing 12. This pressure sensor 28 determines an operating pressure.

In the exemplary embodiment shown in FIG. 1, the pressure sensor 28 is arranged between the pump 26 and the water heater 14.

It is fundamentally possible for the pressure sensor 28 to be connected upstream of the instantaneous water heater 14 (FIG. 14) or to be connected downstream. The flow heater 28 is preferably connected upstream of an outlet 30 for hot water and is preferably connected upstream of a valve 32.

The hot water cleaning device 10 has a nozzle device 34, via which hot water can be sprayed. The nozzle device 34 is designed such that a good spread pattern is achieved for cleaning purposes. In particular, it is designed such that a relatively low volume flow is also achieved

for example in the range between 20 ml / min and 90 ml / min of hot water with an effective cleaning effect.

In particular, the nozzle device 34 is or comprises a nebulizing nozzle, which ensures a corresponding spray pattern.

In the housing 12, a check valve 36 is arranged, which is designed in particular as a safety valve. A return line 38 is connected to the check valve 36 and leads to the reservoir device 20.

When the shut-off valve 36 is in a shut-off mode, water can be returned to the reservoir device 20 via the return line 38. (The flow path is indicated by arrows in FIG. 1.) Even when the pump 26 is in operation, a type of water circuit with return flow can be Realize the return line 38 into the reservoir device 20.

In the exemplary embodiment shown, the shut-off valve 36 is arranged between the pump 26 and the water heater 14.

Basically, it is provided that the shut-off valve 36 is positioned between the pump 26 and the outlet 30 and in particular is connected upstream of the valve 32.

In the exemplary embodiment shown, the check valve 36 is connected downstream of the pressure sensor 28. The check valve 36 can also be connected upstream of the pressure sensor 28.

The shut-off valve 36 is designed in particular as a safety valve which, for example, switches to the shut-off mode when a pressure threshold is exceeded and thus prevents water from escaping from the outlet 30.

In the arrangement shown in FIG. 1, a

Prevention of water to the water heater 14 prevented.

The hot water cleaning device 10 comprises a battery device 40 or a connection 42 for a battery device. The battery device 40 is arranged in particular on or in the housing 12.

The battery device 40 is preferably rechargeable.

The battery device 40 provides the necessary electrical energy for operating the hot water cleaning device 10 and in particular for operating the heating device 16, the instantaneous water heater 14 and for operating the pump 26. The hot water cleaning device 10 comprises a control and / or regulating device 44, which is arranged in the housing 12.

A sensor device of the hot water cleaning device 10, which includes the temperature sensor 18, the fill level sensor 22 and the pressure sensor 28, is connected to the control and / or regulating device 44 in a signal-effective manner. These provide their corresponding sensor signals

Control and / or regulating device 44 ready.

Corresponding signal lines are indicated in FIG. 1 by the reference symbols 46a (which is assigned to the temperature sensor 18), 46b (which is assigned to the filling level sensor 22) and 46c (which is assigned to the pressure sensor 28).

Electrical lines 48a, 48b, via which the pump 26 or the heating device 16 are supplied with electrical energy by the battery device 40, are indicated in FIG. 1 by the reference symbols 48a, 48b.

The control and / or regulating device 44 controls the pump 26 and the heating device 16. Corresponding control lines are indicated in FIG. 1 by the reference numerals 50 and 52.

The hot water cleaning device 10 is operated such that hot water without a vapor phase transition is provided on the nozzle device 34. In particular, hot water is provided in a temperature range between 50 ° C and 95 ° C. A typical operating pressure is between 3 bar and 4 bar.

In a specific embodiment, the operating pressure is approximately 3.5 bar and hot water is provided at a temperature of approximately 70 ° C. The control and / or regulating device 44 carries out such a control process or regulation process that the operating parameters mentioned are maintained. For this purpose, the pump 26 (for setting the operating pressure) and the heating device 16 (for setting the temperature) are controlled accordingly.

The control and / or regulating device 44 determines the corresponding control signals from corresponding measurement signals, in particular from the temperature sensor 18 and the pressure sensor 28.

The hot water cleaning device 10 has a display device 54 which, for example, comprises a plurality of LEDs. In particular, the display device 54 is controlled by the control and / or regulating device 44. It can be displayed, for example, on the display device 54 whether the hot water cleaning device 10 is in an operating state or not, whether the storage container device 20 is sufficiently filled or not, whether the descaling device 24 is worn out or not, etc.

In one embodiment, the control and / or regulating device 44 includes a running time determination device 56. This can be used to determine a running time of the hot water cleaning device during operation.

For example, continuous operation of the pump 26 is determined. The degree of wear of the decalcifying device 24 can thereby be determined at least indirectly. An exchange signal can then be given in good time.

The hot water cleaning device 10 is operated as follows:

Liquid water is received in the reservoir device 20. In operation, it is conveyed to the instantaneous water heater 14 by the pump 26.

The pump 26 also sets a corresponding operating pressure. Hot water is generated at the instantaneous heater 14 without a phase transition to steam. So hot water is produced in a single phase. This is regulated by the control and / or regulating device 44, which controls the heating device 16 and the pump 26 accordingly.

The control takes place on the basis of sensor data of the pressure sensor 28 and the temperature sensor 18.

The hot water, which is provided at an outlet 58 of the continuous-flow heater, is dispensed at the nozzle device 34. The nozzle device 34 provides a corresponding nebulization or spraying.

The battery device 40 provides the necessary electrical energy for operating the hot water cleaning device 10 and in particular the pump 26 on the heating device 16.

A relatively low volume flow (see above) of hot water can be achieved, an effective cleaning action with hot water being achievable with a corresponding scatter pattern on the nozzle device 34.

The hot water cleaning device 10 is operated in such a way that no steam is produced. As a result, high energy savings can be achieved with a good cleaning result. For example, based on heating water from 20 ° C to 70 ° C without a vapor phase transition, energy savings of around 90% can be achieved compared to heating from 20 ° C to 140 ° C. As a result, the hot water cleaning device 10 can be operated in an optimized manner with the battery device 40 and an effective cleaning process can be carried out without the battery device 40 being discharged too quickly.

According to the invention, it is provided that a flow path 60 between the outlet 58 of the instantaneous water heater 14 and the valve 32 is kept short.

It has a length of at most 20 cm and in particular at most 15 cm. In a specific exemplary embodiment, this length of the flow path 60 is less than 9 cm. Due to the relatively short length of the flow path 60, the outflow of water can be kept low. Furthermore, cooling of water (from hot water) on this flow path 60 can be minimized.

The arrangement of the individual components in the housing 12 depends on the type of hot water cleaning device 10.

The hot water cleaning device 10 can be implemented, for example, as a hand-held device. Corresponding exemplary embodiments are shown in FIGS. 2 to 4, the same reference numerals being used for the same components as in the hot water cleaning device 10.

An exemplary embodiment of a hand-held hot water cleaning device 62 (FIG. 2) comprises a housing 64 on which a handle 66 is formed. The hot water cleaning device 62 can be held with one hand on the handle 66.

A switch 68 is assigned to the handle 66, which can be operated, for example, by an index finger while holding the hot water cleaning device on the handle 66. The switch 68 acts in particular on the valve 32 in order to be able to release the spraying of hot water.

For example, the control and / or regulating device 44 (in particular as one or more electronic components) is arranged on the handle 66.

Spaced apart from the handle 66, the housing 64 comprises a web 70.

A free space 72 is formed between the handle 66 and the web 70, through which fingers of a holding hand can go through for holding on the handle 66. The switch 68 projects into the free space 72. The housing 64 has a lower housing part 74, which is arranged below the handle 66 and the web 70 and connects them to one another.

The battery device 40 is positioned on the lower housing part 74.

Furthermore, the storage container device 20 (optionally with a decalcifying device 24) is positioned on the lower housing part 74.

The housing also has an upper housing part 76. This connects the handle 66 and the web 70 spaced apart from the lower housing part 74; The web 70 and the handle 66 are positioned between the lower housing part 74 and the upper housing part 76.

For example, the pump 26 is positioned in the web 70.

The instantaneous water heater 14 is positioned in the upper housing part 76. The valve 32 is also positioned in it.

It can be provided that the check valve 36 and / or the pressure sensor 28 are positioned in the upper housing part 76.

In each case or together, they can also be positioned in the web 70.

The hot water cleaning device 62 is designed like a pistol. It can be held on the handle 66. A surface to be cleaned can be charged with hot water via the nozzle device 34 at one end of the upper housing part 76.

A further exemplary embodiment of a hand-held hot water cleaning device 78 (FIG. 3) comprises a housing 80. A bow handle 82 is arranged on the housing 80. Is between the housing 80 and the bow handle a free space 84 is formed through which fingers of an operator's hand can dip.

A switch 86 is seated on the bow handle 82 and can be operated when the hot water cleaning device 78 is held in particular on the bow handle 82. In particular, valve 32 can be released via switch 66.

In one embodiment, the control and / or regulating device 44 sits at least partially in the bow handle 82.

The housing 80 has a flange 88. The nozzle device 34 is seated on the flange 88 or on a cleaning attachment on the flange 88 (not shown in FIG. 3).

In one embodiment, valve 32 is positioned in flange 88.

The battery device 40, the reservoir device 20, the pump 26, the shut-off valve 36 and the flow heater 14 are positioned in the housing 80. The pressure sensor 28 is also positioned in it.

In the exemplary embodiment shown (FIG. 3), the pressure sensor 28 is arranged between the instantaneous heater 14 and the valve 32.

The temperature sensor 18 is not shown in FIG. 3.

In the exemplary embodiment shown in FIG. 3, the flow heater 14 is curved in order to enable space-saving accommodation in the housing 80.

FIG. 4 shows a variant 62 'of the hot water cleaning device 62. This is designed with the bow handle 82 and the housing 80 basically the same as the hot water cleaning device 62, wherein in the shown Variant of the pressure sensor 28 is positioned between the pump 26 and the check valve 36.

The hot water cleaning devices 62, 62 'can also be held like pistols.

Another exemplary embodiment of a hand-held or hand-held hot water cleaning device 90 (FIG. 5) comprises a housing 92. A handle 94 is formed on the housing. The housing 92 has an opening 96 which is continuous and is delimited by the handle 94. Fingers of an operator's hand, which hold the hot water cleaning device 90 by the handle 94, can penetrate through the opening 96.

The components of the reservoir device 20, pump 26, shut-off valve 36, instantaneous heater 14, pressure sensor 28, valve 32, battery device 40 are arranged in the housing.

A telescopic tube 98 is seated on the housing 92. The nozzle device 34 is positioned on the telescopic tube 98 via a (detachable) cleaning attachment.

The handle 94 is positioned on a rear and top of the housing 92. Through it, the hot water cleaning device 90 can be held and guided, as it were, hanging downwards.

A further exemplary embodiment of a hand-held or hand-guided hot water cleaning device 102 (FIG. 6) comprises one

Housing 104. A bow handle 106 protrudes from housing 104 from a rear side. The hot water cleaning device 102 can be held above this in particular hanging downward.

The corresponding components are arranged in the housing 104. Another embodiment of a hand-held hot water cleaning device 108 (FIG. 7) is designed, for example, as a mop. The hot water cleaning device 108 has a cleaning head 110. It also has a housing body 112. The cleaning head 110 is fixedly or movably connected to the housing body 112.

A handle and in particular a bow handle 114 are arranged on a rear side 114 of the housing body 112. The hot water cleaning device 108 can be guided over this over a surface to be cleaned and in particular over a floor to be cleaned.

The corresponding components of the hot water cleaning device 108 are arranged in the housing body 112 as described above.

The nozzle device 34 is positioned in the cleaning head 110. A surface to be cleaned, on which in particular the cleaning head 110 is supported, can be supplied with hot water via the nozzle device 34 on the cleaning head 110.

Another exemplary embodiment of a hand-held hot water cleaning device 116, which is shown in FIG. 8, has a fundamentally the same structure as the hot water cleaning device 108 with a cleaning head 118, a housing body 120 and a bow handle 122.

The corresponding functional components of the hot water cleaning device 116 are arranged in the housing body 120.

A cleaning tool 124 is arranged on the cleaning head 118. The cleaning tool 124 is, for example, a roller with a trim made of a textile material and / or a cleaning brush. A roller can also be provided, for example, which has a brush trim and a textile trim. In particular, the cleaning tool 124 can be rotated about an axis of rotation 126. A corresponding drive motor for rotation about the axis of rotation 126 can be assigned to the cleaning tool 124.

The nozzle device 34 is designed such that it acts on the cleaning tool 124 on the cleaning head 118 with hot water, for example in the form of drops.

Another exemplary embodiment of a hot water cleaning device 128 (FIG. 9) is designed to be self-propelled. It has a housing 130 in which the corresponding functional components of the hot water cleaning device 128 are arranged.

The hot water cleaning device 128 is self-propelled and self-steering. (A corresponding drive device and wheel device is not shown in FIG. 9).

The housing 130 has an underside 132. A corresponding nozzle device 34 is arranged in such a way that hot water can be applied to an area to be cleaned via the underside 132; the hot water cleaning device 128 can run as a cleaning robot over the surface to be cleaned and in doing so act on the nozzle device 34 by means of the underside 132 with hot water.

Another exemplary embodiment of a hot water cleaning device 134 comprises a housing 136. A wheel device 138 with rear wheels 140 and one or more front wheels, in particular in the form of a support roller, is arranged on the housing 136. The hot water cleaning device 134 can be set up on a base via the wheel device 138.

In principle, it is also possible for only one rear wheel 140 to be installed. In comparison to the illustration shown in FIG. 10, the housing 136 is then tilted to the left by 90 °. The functional components of the hot water cleaning device 134 are arranged in the housing 136.

A connection 144 is positioned downstream of the valve 32 on the housing 136. A hose 146 (extension hose) can be connected to the connection 144, for example. A holder 148 for a cleaning attachment 150 can in turn be connected or connected to the hose 146. The cleaning attachment 150 with the nozzle device 34 sits on the holder 150.

The connection 144 is designed in such a way that different accessories can be connected.

According to the invention, a hot water cleaning device 10 is provided, in which hot water is used as the cleaning fluid, the hot water cleaning device 10 being operated in such a way that there is no vapor phase transition.

As a result, the hot water cleaning device 10 can be operated in an energy-saving manner and it can in particular be operated with the battery device 40. The battery device 40 is advantageously rechargeable. In this case, the hot water cleaning device 10 can be recharged

be provided, or this can be removable from this and can be charged in a separate charger.

An effective cleaning process can thus be carried out without mains power.

In particular, the nozzle device 34 comprises one or more atomizing nozzles in order to achieve an optimized spray pattern for a cleaning process. In principle, it is possible that, alternatively to the battery device 40, the hot water cleaning device 10 can also be operated with mains power.

Reference list

Hot water cleaning device

casing

Instantaneous water heater

Heating device

Temperature sensor

Storage facility

Level sensor

Descaling device

pump

Pressure sensor

output

Valve

Nozzle device

Check valve

Return line

Battery device

connection

Control and / or regulating device a signal line

b Signal line

c signal line

a Electrical line

b Electrical line

Control line

Display device

Duration determination device

output

Flow path

Hot water cleaning device Hot water cleaning device

casing

Handle

switch

web

Free space

Lower part of the housing

Upper part of the housing

Hot water cleaning device

casing

Bow handle

Free space

switch

flange

Hot water cleaning device

casing

Handle

opening

Telescopic tube

Hot water cleaning device

casing

Bow handle

Hot water cleaning device cleaning head

Housing body

Bow handle

Hot water cleaning device cleaning head

Housing body

Bow handle

Cleaning tool

Axis of rotation

Hot water cleaning device casing

bottom

Hot water cleaning device

casing

Wheel device

Rear wheel

Front wheel

connection

tube

holder

Cleaning attachment

Claims

1. A hot water cleaning device comprising a water heater (14) with a heating device (16), a nozzle device (34) for spraying hot water, a pump (26) which is fluidly connected to the water heater (14), and a connection ( 42) for a battery device (40) and / or a battery device (40) which provides electrical energy for operating the heating device (16), the heating device (16) being operated such that the continuous-flow heater (14) hot water without steam - Provides phase transition.

2. Hot water cleaning device according to claim 1, characterized in that at an operating pressure of the instantaneous heater (14) hot water has a temperature in the range between 50 ° C and 95 ° C and in particular a temperature in the range between 65 ° C and 75 ° C.

3. Hot water cleaning device according to claim 2, characterized in that the operating pressure is in the range between 3 bar and 4 bar and in particular in the range between 3.3 bar and 3.7 bar.

4. Hot water cleaning device according to one of the preceding claims, characterized in that the hot water cleaning device is operated at an operating pressure of approximately 3.5 bar and hot water provided by the water heater (14) has a temperature in the

Range between 69 ° C and 73 ° C.

5. Hot water cleaning device according to one of the preceding claims, characterized in that a flow path (60) for hot water between an outlet (58) of the instantaneous water heater (14) and a valve (32) has a length of at most 20 cm and in particular

has a maximum of 15 cm and in particular a maximum of 10 cm and in particular a maximum of 9 cm.

6. Hot water cleaning device according to one of the preceding claims, characterized in that the nozzle device (34) is connected upstream of a valve (32) with respect to a flow direction.

7. Hot water cleaning device according to one of the preceding claims, characterized in that the pump (26) is connected upstream of the water heater (14).

8. Hot water cleaning device according to one of the preceding claims, characterized in that the battery device (40) provides electrical energy for operating the pump (26).

9. Hot water cleaning device according to one of the preceding claims, characterized by a storage container device (20) for water, wherein in one operating mode a pump (26) conveys water from the storage container device to the continuous-flow heater (14).

10. Hot water cleaning device according to claim 9, characterized in that the storage container device (20) is assigned a decalcifying device (24).

11. Hot water cleaning device according to claim 9 or 10, characterized in that the reservoir device (20) is assigned a level sensor (22).

12. Hot water cleaning device according to one of the preceding claims, characterized by a check valve (36) which is arranged in a fluid flow path between a pump (26) and the nozzle device (34).

13. Hot water cleaning device according to claim 12, characterized in that the shut-off valve (36) is coupled to a return line (38) which leads to a reservoir device (20) for water, in a shut-off mode of the shut-off valve (36) Leakage of fluid at the nozzle device (34) is blocked and water is conveyed through the return line (38) into the reservoir device (20).

14. Hot water cleaning device according to claim 11 or 12, characterized

characterized in that the check valve (36) is designed as a safety valve.

15. Hot water cleaning device according to one of the preceding claims, characterized by a sensor device which comprises at least one of the following:

- a pressure sensor (28) which determines an operating pressure in the fluid;

- A temperature sensor (18) which determines a temperature for heated fluid;

- A fill level sensor (22), which determines a fill level on a storage container device (20) for water.

16. Hot water cleaning device according to one of the preceding claims, characterized by a control and / or regulating device (44) which controls at least one of the following:

- the heating device (16),

- The pump (26), the control and / or regulating device (44) being connected in a signal-effective manner to a sensor device and determining control signals on the basis of sensor signals from the sensor device.

17. Hot water cleaning device according to claim 16, characterized in that the control and / or regulating device (44) control signals based on sensor signals of a pressure sensor (28), which determines an operating pressure in the fluid, and on the basis of temperature signals, which are determined by a temperature sensor (18) for the fluid.

18. Hot water cleaning device according to one of the preceding claims, characterized in that the control and / or regulating device (44) has a duration determination device (56), which is used in particular to determine wear of a decalcifying device (24).

19. Hot water cleaning device according to one of the preceding claims, characterized in that the nozzle device (34) for a flow of hot water in the range between 20 ml / min and

90 ml / min is designed.

20. Hot water cleaning device according to one of the preceding claims, characterized in that the nozzle device (34) is or comprises a nebulizing nozzle.

21. Hot water cleaning device according to one of the preceding claims, characterized in that the nozzle device (34) is arranged and designed such that a surface to be cleaned can be acted upon directly with hot water.

22. Hot water cleaning device according to one of the preceding claims, characterized in that the nozzle device (34) is arranged and designed such that a cleaning tool (124) and in particular a cleaning brush or cleaning roller can be acted upon with hot water.

23. Hot water cleaning device according to one of the preceding claims, characterized by a housing (12), in which the flow heater (14) and a pump (26) are arranged, the connection (42) for the battery device (40 ) and / or the battery device (40) are arranged on or in the housing (12).

24. Hot water cleaning device according to one of the preceding claims, characterized by training as a hand-held or hand-held device.

25. Hot water cleaning device according to one of claims 1 to 23,

characterized by training as a self-driving and self-steering device.

26. Hot water cleaning device according to one of the preceding claims, characterized in that the flow heater (14) has a straight or curved shape and in particular is adapted to a housing (12) and follows the course of a housing part.

27. A method for operating a hot water cleaning device, in particular according to one of the preceding claims, in which electrical energy for operation is provided by a battery device (40), water is conveyed by a pump (26), on a continuous-flow heater (14) hot water is provided with the heating device (16), and the pump (26) and / or the heating device (16) are controlled in such a way that hot water is provided at the instantaneous water heater (14) without a vapor phase transition.

28. The method according to claim 27, characterized in that a

Operating pressure is measured on the fluid and a temperature for heated fluid is measured and the pump (26) and / or the heating device (16) is controlled on the basis of appropriate measurement signals.

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