High-pressure cleaning appliance and injection device for high-pressure cleaning appliance

Abstract

The invention relates to a high-pressure cleaning appliance comprising: a connection for a liquid source; a high-pressure pump; a main line through which liquid can be conveyed from the connection to the injection opening of the main line by means of a high-pressure pump; a main line valve disposed in the main line; and an operating device. The main line valve prevents liquid from flowing through the main line in the closed state and allows liquid to flow through the main line in the fully open state. The main line valve can be switched between a fully open state and a closed state by means of an operating device. The operating device has a valve operating element and a pressure operating element. The pressure operating element can be operated independently of the valve operating element. The main line valve can be switched between a fully open state and a closed state by means of a valve operating element. By means of the pressure-actuating element, the pressure of the liquid in a section between the high-pressure pump and the injection opening in the main line can be specified, in particular in the fully open state of the main line valve.

Description

Technical Field

[0001] This invention relates to a high-pressure cleaning appliance and a handheld spray unit for the high-pressure cleaning appliance. Background Technology

[0002] A high-pressure cleaning appliance with a handheld jetting unit is known from WO 2016 / 102075 A1, wherein a lever is provided at the jetting unit for opening and closing the main pipeline valve for guiding liquid through. Before activating the high-pressure cleaning appliance, one of three pressure levels can be selected by means of a panel located away from the lever. This allows the pressure in the main pipeline of the high-pressure cleaning appliance to be preset. Summary of the Invention

[0003] The objective of this invention is to improve high-pressure cleaning appliances or handheld spray units in such a way that the appliances can be operated comfortably and flexibly, especially during operation. This objective is achieved by a high-pressure cleaning appliance comprising: a connector for a liquid source; a high-pressure pump; a main pipeline through which liquid can be delivered from the connector to a spray opening in the main pipeline by means of the high-pressure pump; a main pipeline valve disposed in the main pipeline; and an operating device, wherein the main pipeline valve, in a closed state, prevents liquid flow through the main pipeline, and wherein the main pipeline valve, in a fully open state, allows liquid flow through the main pipeline, wherein the main pipeline valve can be switched between a fully open and closed state by means of the operating device, wherein the operating device has a valve operating element and a pressure operating element, wherein the pressure operating element can be operated independently of the valve operating element, wherein the main pipeline valve can be switched between a fully open and closed state by means of the valve operating element, and wherein the pressure operating element can pre-set the pressure of the liquid in the section of the main pipeline between the high-pressure pump and the spray opening.

[0004] This objective is achieved by a handheld spray unit for a high-pressure cleaning appliance, wherein the high-pressure cleaning appliance includes: a connector for a liquid source; a high-pressure pump; a main pipeline through which liquid can be delivered from the connector to a spray opening of the main pipeline by means of the high-pressure pump; and a main pipeline valve disposed in the main pipeline, wherein the main pipeline valve prevents liquid flow through the main pipeline in a closed state, and allows liquid flow through the main pipeline in a fully open state, wherein the handheld spray unit has an operating device for switching between the fully open and closed states, wherein the operating device has a valve operating element for switching the main pipeline valve between the fully open and closed states, wherein the operating device has a pressure operating element for pre-setting the pressure of the liquid in the section of the main pipeline between the high-pressure pump and the spray opening, and wherein the pressure operating element can be operated independently of the valve operating element.

[0005] In both cases, the high-pressure cleaning appliance includes: a connector for the liquid source; a high-pressure pump; a main pipeline through which the liquid can be delivered from the connector to the spray opening of the main pipeline by means of the high-pressure pump; and a main pipeline valve disposed in the main pipeline. The main pipeline valve, in the closed state, prevents liquid flow through the main pipeline. The main pipeline valve, in the fully open state, allows liquid flow through the main pipeline. Specifically, the flow cross-section of the main pipeline at the location of the main pipeline valve is largest when the main pipeline valve is fully open.

[0006] The high-pressure cleaning appliance according to the invention includes an operating device. The handheld spray unit according to the invention also includes an operating device. The main pipeline valve can be switched between a fully open and a closed state by means of the operating device.

[0007] According to the invention, the operating device includes a valve operating element and a pressure operating element. The valve operating element is used to switch the main pipeline valve between a fully open state and a closed state. The pressure operating element is used to pre-set, and in particular to set, the pressure of the liquid in the section of the main pipeline between the high-pressure pump and the injection port. Specifically, by means of the pressure operating element, the pressure of the liquid in the section of the main pipeline between the high-pressure pump and the injection port can be pre-set, and in particular set, by means of the main pipeline valve in the fully open state. The pressure operating element can be operated independently of the valve operating element. Specifically, the pressure operating element can be operated independently of the valve operating element, at least in the first segment of the adjustment stroke of the pressure operating element when the unoperated pressure operating element is operated. Specifically, the valve operating element can be operated without simultaneously operating the pressure operating element. Specifically, the pressure operating element can be operated without simultaneously operating the valve operating element. Specifically, the valve operating element and the pressure operating element are not coupled to each other, and in particular, are not mechanically coupled to each other. However, such coupling is also possible. Specifically, it can be specified that the pressure operating element can be mechanically pressed without simultaneously pressing the valve operating element. Specifically, high-pressure cleaning appliances, especially handheld spray units, can be designed such that the pressure-operated element does not trigger a function when operated without simultaneously operating the valve-operated element. Specifically, the pressure-operated element does not trigger a change in pressure. Specifically, this separation of mechanical operation and functional activation is achieved in the control technology. Therefore, the pressure-operated element and the valve-operated element experience minimal wear. Mechanical coupling between the pressure-operated element and the valve-operated element is not necessary. Specifically, the high-pressure cleaning appliance, especially the handheld spray unit, includes a control unit. Specifically, signals are sent to the control unit when the pressure-operated element and / or the valve-operated element are operated. Specifically, the control unit only allows a change in pressure due to the operation of the pressure-operated element when the valve-operated element is also operated simultaneously. This prevents pressure rise acting on the closed main line valve. Therefore, the main line valve experiences minimal wear.

[0008] Because high-pressure cleaning equipment, especially spray units, includes operating devices with both valve-operated and pressure-operated elements, it is possible to operate high-pressure cleaning equipment, especially spray units, comfortably. Both the pressure-operated and valve-operated elements can be manipulated in an ergonomic manner.

[0009] Specifically, the handheld spray unit is a component of the high-pressure cleaning appliance. Specifically, the spray opening is located at the handheld spray unit. Specifically, the operating device is located at the handheld spray unit. This allows for comfortable operation of the operating device during the operation of the high-pressure cleaning appliance, especially during the guidance of the handheld spray unit.

[0010] Specifically, the handheld spray unit has a gripping area. Specifically, the user can guide the handheld spray unit while gripping the gripping area. Specifically, the valve operating element and the pressure operating element can be operated jointly by the user's single hand while gripping the gripping area. This allows for comfortable and ergonomic operation of the device. The use of a second hand is not mandatory during liquid spraying and during simultaneous pressure adjustment in the main pipeline. Specifically, the valve operating element and the pressure operating element can be operated jointly by the user's single finger while gripping the gripping area. Therefore, the operator can use a single finger not only to switch the main pipeline valves but also to pre-set, especially influence, and especially set the pressure of the liquid in the section of the main pipeline between the high-pressure pump and the spray nozzle. This is especially possible during liquid spraying from the spray nozzle. This allows for comfortable and flexible operation of the spray unit, especially high-pressure cleaning equipment. The operator can pre-set operating commands using a single finger while guiding the handheld spray unit in an ergonomic manner.

[0011] Specifically, the pressure-operating element can be operated using a single three-joint finger while gripping the area. For example, the index finger can be used to operate the pressure-operating element while gripping the area. Furthermore, while operating the pressure-operating element with a single three-joint finger, the valve-operating element can be operated using another three-joint finger of the same hand. For example, the middle finger of the same hand can be used to operate the valve-operating element while operating the pressure-operating element with the index finger. This allows for particularly ergonomic operation of handheld spray units, especially high-pressure cleaning devices. The thumb has two joints, not three.

[0012] In a particular improvement of the invention, the valve operating element is specified as a pivot rod pivotable about a pivot axis of the valve operating element. Specifically, the pressure operating element is a pivot rod pivotable about a pivot axis of the pressure operating element. Specifically, the valve operating element has a valve point arranged with the maximum valve distance relative to the pivot axis of the valve operating element, which is particularly accessible and operable from the outside by the operator. The valve point has the maximum valve distance relative to the pivot axis of the valve operating element in the following sense: the valve point is a point on the valve operating element that is accessible to the operator to operate the valve operating element in its unoperated state, particularly by using a finger to operate it by placing the finger directly on the valve point, and simultaneously has the maximum distance relative to the pivot axis of the valve operating element. Specifically, the pressure operating element has a pressure point arranged with the maximum pressure distance relative to the pivot axis of the pressure operating element, which is particularly accessible and operable from the outside by the operator. The pressure point has the maximum pressure distance relative to the pivot axis of the pressure operating element, in particular, that is, a point on the pressure operating element that is accessible to the operator in the unoperated state for manipulating the pressure operating element, especially by placing the fingers directly on the pressure point, and simultaneously has the maximum distance relative to the pivot axis of the pressure operating element. Specifically, the maximum valve distance is greater than the maximum pressure distance. Due to the larger lever that can function when operating the valve operating element, the valve operating element can be operated with less force. A large torque can be generated with a small force. This allows for comfortable and as easy as possible opening of the main pipeline valve by means of the valve operating element. Due to the small maximum pressure distance, the pressure operating element can be designed to be smaller and more compact. This allows for ergonomic operation of the operating device. Furthermore, the different maximum distances of the maximum valve distance and the maximum pressure distance enable a design scheme for the operating device that allows for the independent operation of not only the pressure operating element but also the valve operating element, without the need to operate other operating elements separately. Specifically, the maximum valve distance is at least 150%, and particularly 200%, of the maximum pressure distance. Due to the smaller maximum pressure gap, a smaller pivot circle is obtained for pressure-operated elements constructed as pivot rods. This allows for ergonomic operation of the pressure-operated element.

[0013] In a particular improvement of the invention, the valve operating element has a recess. The pressure operating element is at least partially received in the recess. Specifically, the pressure operating element protrudes through the recess of the valve operating element. Thus, the operating device, including both the valve operating element and the pressure operating element, can be designed to be generally compact. In this way, both the valve operating element and the pressure operating element can be operated simultaneously. Specifically, during the operation of the valve operating element, the pressure operating element can be operated simultaneously using the same hand, especially the same finger, and especially the same three-joint fingers. Specifically, the pressure operating element can be operated using three-joint fingers, and the valve operating element can be operated particularly simultaneously using directly adjacent three-joint fingers of the same hand.

[0014] Specifically, the pressure actuating element is pivotally supported at the valve actuating element. The pivot axis of the pressure actuating element extends through the valve actuating element. This design of the operating device, consisting of the pressure actuating element and the valve actuating element, results in excellent ergonomics. In particular, the pivot axis of the pressure actuating element is arranged at a distance relative to the pivot axis of the valve actuating element. Thus, even with a large pivot circle for the valve actuating element, a small pivot circle for the pressure actuating element can be achieved. This arrangement of the two pivot axes allows for ergonomic operation, especially of the pressure actuating element.

[0015] Specifically, the high-pressure cleaning appliance has a motor for driving the high-pressure pump. The motor has an off state and an on state. The motor can be adjusted between the off and on states by means of a valve operating element. This additional function associated with the valve operating element allows for particularly comfortable operation of the high-pressure cleaning appliance, especially the handheld spray unit. In particular, it can be specified that the motor moves to the off state as the valve operating element moves to the inactive state. Thus, when the main pipeline valve is closed, the motor is turned off shortly before, simultaneously with, or shortly after, thereby preventing the motor from generating unwanted pressure on the closed main pipeline valve due to the high-pressure pump.

[0016] Specifically, high-pressure cleaning appliances, especially handheld spray units, include a detector. The detector is designed to detect the adjustment position of the pressure-operated element. Specifically, the detector has a potentiometer or Hall sensor. Specifically, the detector is a potentiometer or Hall sensor. Specifically, a mechanical connection element is arranged between the detector and the pressure-operated element. Suitably, the detector determines the value of the pressure predetermined by the pressure-operated element in the main pipeline based on the detector stroke traversed by the detector's position element. Specifically, the position element is adjustable along the maximum detector stroke. Specifically, the pressure-operated element is adjustable along the maximum adjustment stroke. Specifically, the maximum adjustment stroke corresponds to at least 110%, particularly at least 150%, particularly at least 200% of the maximum detector stroke. This allows for switching between the pressure-operated element and the detector's position element. Because the maximum adjustment stroke of the pressure-operated element is larger than the maximum detector stroke of the position element, the desired pressure in the main pipeline can be predetermined with high accuracy by means of the pressure-operated element.

[0017] Specifically, the main pipeline has a suction space between the connector and the high-pressure pump. The main pipeline also has a pressure space between the high-pressure pump and the injection port. In a particular embodiment of the invention, the pressure space is fluidly connected to the suction space via a bypass line. A bypass valve is particularly arranged in the bypass line. Specifically, the free cross-sectional area of ​​the bypass line can be set for adjusting the pressure in the pressure space by means of the bypass valve. Suitably, the bypass valve can be adjusted by means of a pressure-operated element to set the free cross-sectional area of ​​the bypass line. The cross-sectional area of ​​the bypass line can be pre-defined by means of the pressure-operated element. This enables comfortable operation of the high-pressure cleaning appliance.

[0018] Specifically, the high-pressure cleaning appliance is designed such that the size of the free cross-sectional area of ​​the bypass valve is set according to the adjustment position of the pressure-operated element. Specifically, the size of the free cross-sectional area can be adjusted by means of the pressure-operated element in at least six levels, particularly at least 10 levels, particularly up to 30 levels, particularly up to 20 levels. This allows for the setting and, particularly, the adjustment of the pressure in the section between the high-pressure pump and the jet inlet with high precision, and almost continuously. Specifically, the size of the free cross-sectional area can be adjusted almost continuously by means of the pressure-operated element. Therefore, it appears to the operator that the pressure in the section of the main pipeline between the high-pressure pump and the jet inlet can be continuously preset, and especially set. It can be specified that, by means of the pressure-operated element, the pressure of the liquid in the main pipeline between the high-pressure pump and the jet inlet can be continuously preset, especially when the main pipeline valve is fully open. This allows for comfortable operation of the high-pressure cleaning appliance. The pressure in the section of the main pipeline between the high-pressure pump and the jet inlet can be precisely adapted to the corresponding operating conditions.

[0019] In a particular design of the present invention, the high-pressure cleaning appliance is designed such that the motor's operating state can only be adjusted between the closed and open states when the valve is in the fully open state. This avoids the application of large pressures to the main line valve via the motor and high-pressure pump during liquid pumping. Because the high-pressure cleaning appliance is structurally designed such that the motor's operating state can only be adjusted when the main line valve is in the fully open state, the motor can only be switched from the open to the closed state when the main line valve is in the fully open state. This ensures that when the motor is switched from the open to the closed state, the pressure in the main line due to the pumping of liquid by means of the high-pressure pump is at least partially reduced. This avoids the main line valve experiencing large pressures after being switched to the closed state. The components involved when the motor is closed and / or switched on are not subjected to pressure or only to small pressures due to the liquid pumped. Because of the small pressure in the main line, especially when the valve is closed and the motor is closed, a small force is required to set the valve to the fully open state. The operator needs to apply only a small amount of force, as they do not have to overcome the high pressure of the liquid in the main pipeline. This enables comfortable use of the high-pressure cleaning appliance according to the invention. Attached Figure Description

[0020] Embodiments of the present invention will now be explained with reference to the accompanying drawings. Wherein: Figure 1 A perspective view of the pump unit of a high-pressure cleaning appliance is shown. Figure 2 and Figure 3 A perspective view of the handheld spray unit of a high-pressure cleaning appliance is shown. Figure 4 It shows that according to Figure 2 and Figure 3 Side view of the handheld jet unit. Figure 5 A schematic diagram of a high-pressure cleaning appliance with unoperated pressure-operated elements and unoperated valve-operated elements is shown. Figure 6 The diagram shows a valve with an actuated valve operating element and an unactuated pressure operating element from... Figure 5 A schematic diagram of a high-pressure cleaning device. Figure 7 It shows a device with an actuated valve operating element and an actuated pressure operating element from [unclear - possibly a specific source]. Figure 5 A schematic diagram of a high-pressure cleaning device. Figure 8 It shows a device with an actuated valve operating element and an actuated pressure operating element from... Figure 5 A schematic diagram of a handheld spray unit of a high-pressure cleaning appliance, wherein the user's hand is schematically shown operating it. Figure 9 The following is an example of a device that operates without pressure or valve control elements: Figures 2 to 4 A cross-sectional view of the handheld spray unit. Figure 10 Similarities were shown in the cases of manipulated valve operating elements and unmanipulated pressure operating elements. Figure 9 Cross-sectional view, Figure 11 In the case of manipulated valve operating elements and manipulated pressure operating elements, similarities to those from... Figure 9 Cross-sectional view of the cross section. Figure 12 Showing from Figure 9 Detailed illustrations, and Figure 13 Showing from Figure 11 Detailed illustration. Detailed Implementation

[0021] Figure 1 It shows Figure 5 The pump unit 18 of the high-pressure cleaning appliance 1 is schematically shown in the diagram. In the first embodiment, the high-pressure cleaning appliance 1 includes... Figure 2 The spray unit 11 shown is illustrated. In the second embodiment, the high-pressure cleaning appliance 1 includes... Figure 5 The injection unit 11 shown is as follows. Figure 5 As shown, pump unit 18 and injection unit 11 are fluidly connected to each other via main pipeline 5. In the second embodiment, injection unit 11 is a spray gun. This is in Figure 5 The diagram is shown schematically. However, it is also possible to specify that the spraying unit 11 includes a spray gun and a nozzle, such as... Figures 2 to 4 As shown in the figures. Unless otherwise explicitly stated, the following description applies to both embodiments, even if the corresponding features are described only in conjunction with one of the accompanying drawings.

[0022] The high-pressure cleaning device 1, particularly the spray unit 11, is designed to clean objects using a pressure-driven cleaning fluid. In an embodiment, the high-pressure cleaning device 1 is portable. The high-pressure cleaning device 1 has... Figure 1 The handle 23 is shown. The high-pressure cleaning device 1, and especially the pump unit 18 of the high-pressure cleaning device 1, can be carried at the handle 23. In compliant operation, it is stipulated that the high-pressure cleaning device 1, and especially the pump unit 18, is parked.

[0023] like Figure 5As shown, the high-pressure cleaning appliance 1 includes a high-pressure pump 3. The high-pressure pump 3 is a component of the pump unit 18. The high-pressure pump 3 allows the cleaning fluid in the high-pressure cleaning appliance 1, particularly in the pump unit 18, to be pressurized. The high-pressure pump 3 allows the cleaning fluid to be pressurized to at least 10 bar, particularly at least 15 bar, particularly at least 30 bar, particularly at least 100 bar. Specifically, the high-pressure pump 3 allows the cleaning fluid to be pressurized to at most 600 bar, particularly at most 500 bar. The high-pressure pump 3 includes at least one piston (not shown). At least one piston is capable of reciprocating to generate pressure acting on the cleaning fluid. Typically, the high-pressure pump 3 includes three pistons.

[0024] like Figure 1 and Figure 5 As shown, the high-pressure cleaning appliance 1, particularly the pump unit 18, includes a connector 2 for a liquid source 17. In an embodiment, the liquid source 17 is an external liquid source. In an embodiment, the external liquid source is a tap in a domestic water network. It is also possible to specify that the liquid source is an integral component of the high-pressure cleaning appliance 1. The high-pressure cleaning appliance 1, particularly the handheld spray unit 11, includes a spray opening 6. The high-pressure cleaning appliance 1 includes a main pipe 5. The main pipe 5 of the high-pressure cleaning appliance 1 fluidly connects the connector 2 to the spray opening 6. The connector 2 is located at the pump unit 18. The spray opening 6 is located at the spray unit 11. According to... Figures 2 to 4 In one embodiment, the injection opening 6 is arranged at the nozzle 28 of the injection unit 11. According to... Figure 5 In one embodiment, the spray opening 6 is arranged at the spray unit 11 configured as a spray gun.

[0025] A high-pressure pump 3 can deliver liquid from connector 2 to injection opening 6 via main pipe 5. Liquid source 17 supplies liquid to main pipe 5. High-pressure pump 3 is arranged in main pipe 5. High-pressure pump 3 pressurizes the liquid. High-pressure pump 3 is arranged between suction space 9 and pressure space 10 of main pipe 5. This is in Figure 5 As shown in the diagram. The main pipeline 5 has a suction space 9 between the connector 2 and the high-pressure pump 3. The main pipeline 5 has a pressure space 10 between the high-pressure pump 3 and the injection opening 6. In an embodiment, the suction space 9 is formed by the section of the main pipeline 5 located between the connector 2 and the high-pressure pump 3. In an embodiment, the pressure space 10 is formed by the section of the main pipeline 5 located between the high-pressure pump 3 and the injection opening 6. This section of the main pipeline 5 extends precisely from the high-pressure pump 3 to the injection opening 6. The high-pressure pump 3 delivers liquid from the suction space 9 to the pressure space 10. A greater pressure exists in the pressure space 10 than in the suction space 9. The suction space 9 and the pressure space 10 are components of the main pipeline 5. Downstream of the high-pressure pump 3, a greater pressure exists in the main pipeline 5 than upstream of the high-pressure pump 3.

[0026] A high-pressure pump 3 is arranged in the pump unit 18. The high-pressure pump 3 is constructed separately from the spray unit 11. Different spray units 11 can be connected to the high-pressure pump 3. To drive the high-pressure pump 3, the high-pressure cleaning appliance 1 has a motor 4. The motor 4 is arranged in the pump unit 18. The motor 4 can be constructed as a brushless DC motor. A brushless DC motor is also called an EC motor. The motor can also be a general-purpose motor. In this embodiment, the motor 4 is an induction motor. In the case of an induction motor, the surrounding magnetic field of the stator causes the rotor to move. The induction motor in this embodiment operates using AC voltage. The voltage source can be provided, for example, through the mains voltage. If a battery or accumulator is provided for operation, the motor can also be a brushless DC motor. It can then be specified that the accumulator is a component of the high-pressure cleaning appliance 1. In particular, it can then be specified that the pump unit 18 is a component of the handheld spray unit 11. In this case, the entire high-pressure cleaning appliance 1 can be carried during operation and can be guided by hand.

[0027] like Figure 5 As shown, the high-pressure cleaning appliance 1 includes a main switch 19. The main switch 19 is used to interrupt the voltage supply to the entire high-pressure cleaning appliance 1. The main switch 19 is located at the pump unit 18.

[0028] The high-pressure cleaning appliance 1 includes a main line valve 8. The main line valve 8 is disposed in the main line 5. In an embodiment, the main line valve 8 is disposed in the spray unit 11. The main line valve 8 has two valve states. These two valve states include a closed state 20 (…). Figure 5 ) and fully open state 40 ( Figure 6 In the fully open state 40, the main line valve 8 allows liquid flow through the main line 5. In the fully open state 40, the flow cross-section of the main line 5 at the location of the main line valve 8 is at its maximum. In the fully open state 40, further opening the main line valve 8 does not result in a larger flow cross-section for the liquid in the main line 5 at the location of the main line valve 8. In the closed state 20, the main line valve 8 completely prevents liquid flow through the main line 5. In the fully open state 40 of the main line valve 8, liquid is sprayed from the spray opening 6 during operation of the high-pressure cleaning appliance 1. In the closed state 20 of the main line valve 8, liquid is not sprayed from the spray opening 6. In this embodiment, the main line valve 8 is arranged between the high-pressure pump 3 and the spray opening 6. However, it is also possible to specify that the main line valve 8 is arranged in the pump unit 18. It is also possible to specify that the main line valve 8 is arranged between the connector 17 and the high-pressure pump 3.

[0029] The high-pressure cleaning appliance 1, particularly the spray unit 11, has an operating device 7. The operating device 7 is constructed separately from the main switch 19. The main pipeline valve 8 can be switched between a fully open state 20 and a closed state 40 by means of the operating device 7. In an embodiment, the operating device 7 is arranged at the spray unit 11.

[0030] The operating device 7 has a valve operating element 41 and a pressure operating element 42. The pressure operating element 42 can be operated independently of the valve operating element 41. The high-pressure cleaning appliance 1, especially the spray unit 11, is designed such that the valve operating element 41 can be operated without operating the pressure operating element 42. It can be specified that the high-pressure cleaning appliance 1, especially the spray unit 11, is designed such that the pressure operating element 42 can be operated without simultaneously operating the valve operating element 41. However, such coupling is also possible. In particular, it can be specified that the pressure operating element 42 can be mechanically pressed, without simultaneously pressing the valve operating element 41. In the embodiment, the high-pressure cleaning appliance 1 is designed such that the pressure operating element 42 does not trigger a function when operated without simultaneously operating the valve operating element 41. Here, the pressure operating element 42 does not trigger a change in pressure in the main pipeline 5. This separation of mechanical operation and function activation is achieved in terms of control technology.

[0031] The main pipeline valve 8 can be switched between a fully open state 40 and a closed state 20 by means of the valve operating element 41. The pressure of the liquid in the section of the main pipeline 5 between the high-pressure pump 3 and the injection port 6 can be preset by means of the pressure operating element 42. The pressure of the liquid in the pressure space 10 can be preset by means of the pressure operating element 42. Specifically, the pressure of the liquid in the section of the main pipeline 5 between the high-pressure pump 3 and the injection port 6 can be preset by means of the pressure operating element 42 when the main pipeline valve 8 is in the fully open state 40. It is possible to specify that the pressure of the liquid in the section of the main pipeline 5 between the high-pressure pump 3 and the injection port 6 can be set by means of the pressure operating element 42.

[0032] like Figure 5 As shown, the high-pressure cleaning appliance 1, particularly the pump unit 18, has a bypass line 12. The pressure space 10 is fluidly connected to the suction space 9 via the bypass line 12. Separately from the fluid connection between the suction space 9 and the pressure space 10 via the high-pressure pump 3, the bypass line 12 enables an additional fluid connection between the suction space 9 and the pressure space 10.

[0033] When the high-pressure pump 3 is running, there is a higher pressure in the pressure space 10 than in the suction space 9. Due to this pressure gradient, liquid can flow from the pressure space 10 to the suction space 9 through the bypass line 12. A bypass valve 13 is arranged in the bypass line 12. The free cross-sectional area of ​​the bypass line 12 can be set by means of the bypass valve 13. This allows the pressure in the pressure space 10 to be adjusted. With a larger free cross-sectional area, the pressure balance between the pressure space 10 and the suction space 9 can be achieved to a greater extent. If a high pressure is required in the pressure space 10, the free cross-sectional area of ​​the bypass line 12 is reduced by means of the bypass valve 13. The larger the free cross-sectional area of ​​the bypass line 12, especially the bypass valve 13, the greater the volumetric flow through the bypass line 13, especially through the bypass valve 13, under otherwise constant conditions during operation.

[0034] The bypass valve 13 can be adjusted stepwise or continuously between a fully closed state and a fully open state. The bypass valve 13 can have different degrees of closure between the fully closed and fully open states. In an embodiment, the bypass valve 13 can be adjusted continuously, at least partially. It can also be specified that the bypass valve can be adjusted continuously without interruption between the fully closed and fully open states. The high-pressure cleaning appliance 1 is designed such that the size of the free cross-sectional area of ​​the bypass valve 13 is set according to the adjustment position of the pressure operating element 42. In particular, the size of the free cross-sectional area can be adjusted by means of the pressure operating element 42 in at least six, and especially at least ten levels. It can also be specified that the size of the free cross-sectional area can be adjusted continuously by means of the pressure operating element. In an embodiment, the size of the free cross-sectional area can be adjusted by means of the pressure operating element 42, especially in up to 30, and especially up to 20 levels. In an embodiment, the size of the free cross-sectional area can be adjusted approximately continuously by means of the pressure operating element 42. "Approximately continuous" can be understood in this text as the different pressure levels being so closely adjacent that it appears to the user that the pressure is being adjusted continuously when they manipulate the pressure operating element 42.

[0035] The volumetric flow rate of the liquid in the main pipeline can be set by the degree to which the bypass valve 13 is closed. The more the bypass valve 13 is closed, the smaller the free cross-sectional area of ​​the bypass pipeline 12. The more the bypass valve 13 is closed, the greater the volumetric flow rate of the liquid in the main pipeline 5, especially in the section between the high-pressure pump 3 and the injection opening 6. The more the bypass valve 13 is closed, the greater the volumetric flow rate of the liquid present at the injection opening 6 in the main pipeline 5.

[0036] The bypass valve 13 can be adjusted by means of the operating device 7, particularly by means of the pressure operating element 42. In an embodiment, the pressure operating element 42 is used to set the free cross-sectional area of ​​the bypass line 12. By adjusting the bypass valve 13, the pressure in the main line 5, particularly in the pressure space 10, particularly at the injection opening 6, can be regulated. It is also possible to specify that the pressure in the pressure space can be regulated in other ways. For this purpose, instead of using a bypass line and a bypass valve, for example, the motor speed of the motor 4 can be changed. In this case, the pressure operating element 42 is used to pre-given, particularly to set, the motor speed of the motor 4.

[0037] With the aid of the operating device 7, not only can the main pipeline valve 8 be switched between the fully open state 20 and the closed state 40, but the pressure in the section of the main pipeline 5 between the high-pressure pump 3 and the injection opening 6 can also be preset, especially set.

[0038] The spray unit 11 is movable relative to the pump unit 18. In this embodiment, the main pipeline 5 is constructed as a flexible hose between the pump unit 18 and the spray unit 11. A spray opening 6 is arranged at the spray unit 11. The spray unit 11 can be directed towards the object to be cleaned using its spray opening 6. The spray unit 11 is handheld. An operating device 7 is arranged at the spray unit 11. The user can guide the spray unit 11 with one hand and simultaneously operate the operating device 7 with the same hand.

[0039] The handheld spray unit 11 has a gripping area 14. The operating device 7 is arranged within the gripping area 14. Not only the valve operating element 41, but also the pressure operating element 42 is arranged within the gripping area 14. The high-pressure cleaning appliance 1 is designed so that the user can hold the handheld spray unit 11 by using one hand to grip the gripping area 14, and simultaneously operate the operating device 7 with the same hand, specifically operating not only the valve operating element 41 but also the pressure operating element 42. This is particularly important in… Figure 8 As shown in the diagram. Specifically, the high-pressure cleaner 1 is designed so that the user can hold the handheld spray unit 11 by wrapping one hand around the gripping area 14, and simultaneously operate the operating device 7 using only three joints of the same hand, specifically operating not only the valve operating element 41 but also the pressure operating element 42. Specifically, the high-pressure cleaner 1 is designed so that the user can hold the handheld spray unit 11 by wrapping one hand around the gripping area 14, and simultaneously operate the operating device 7 using a single finger, specifically a single three joint, specifically operating not only the valve operating element 41 but also the pressure operating element 42.

[0040] In this embodiment, the high-pressure cleaning appliance is designed such that the user can hold the handheld spray unit 11 by using one hand to wrap around the gripping area 14, and at the same time operate the device 7 using only a single three-joint finger of the same hand, especially the index finger.

[0041] In typical operation of the high-pressure cleaning appliance 1, especially the spray unit 11, it is not specified to operate the operating device 7 with the thumb. However, it is permissible to operate the operating device 7 with the thumb under special circumstances or special operating conditions. This is typically the case when cleaning the top cover.

[0042] The pressure operating element 42 can be operated using a single three-joint finger while gripping the gripping area 14. The valve operating element 41 can be operated using another three-joint finger of the same hand while operating the pressure operating element 42 using a single three-joint finger.

[0043] Operating device 7 is preloaded to the unoperated state. Not only valve operating element 41, but also pressure operating element 42 is independently preloaded to the unoperated state. For this purpose, springs not shown in the accompanying drawings can be used separately.

[0044] In this embodiment, the operating device 7 is designed such that the pressure operating element 41 can only be operated when the valve operating element 42 is operated. However, it can also be specified that the pressure operating element 41 can be operated when the valve operating element 42 is not operated.

[0045] The high-pressure cleaning appliance 1 is designed such that when the valve operating element 42 is operated, the main pipeline valve 8 is transferred from the fully closed state 20 to the fully open state 40.

[0046] Pressure operating element 41 can Figure 5 The adjustment is performed within the adjustment range 31 shown. Within the adjustment range 31, the pressure operating element 41 can occupy different adjustment positions. It can be specified that the pressure operating element 41 can only be adjusted step by step. In an embodiment, the pressure operating element 41 can be continuously adjusted to the adjustment position within the adjustment range 31.

[0047] The high-pressure cleaning appliance 1 includes a detector 15. The detector 15 is in... Figures 5 to 8 This is illustrated schematically. According to... Figures 9 to 11The detector 15 is shown in more detail in the cross-sectional view of the technical drawings. The detector 15 is designed to detect the adjustment position of the pressure operating element 41 of the operating device 7. The detector 15 is capable of detecting any arbitrary continuous adjustment position of the pressure operating element 41 within the adjustment range 31. It can be specified that the detector 15 is a Hall sensor. In an embodiment, the detector 15 is a potentiometer. The operating device 7, particularly the pressure operating element 42 and the detector 15, are arranged at the injection unit 11 such that the adjustment position of the pressure operating element 41 can be detected. The pressure operating element 41 interacts with the detector 15 at least indirectly. In an embodiment, a mechanical connecting element 44 is arranged between the detector 15 and the pressure operating element 42, such as... Figures 9 to 11 As shown. Mechanical connection element 44 couples the pressure operating element 42 and the detector 15 to each other. With the aid of mechanical connection element 44, the pressure operating element 42 and the detector 15 work together.

[0048] Detector 15 has a position element 45. Position element 45 is adjustable along the maximum detector stroke sm. The maximum detector stroke sm and position element 45 are... Figure 12 and Figure 13 The image is enlarged in size. Based on the detector stroke s traversed by the position element 45 of detector 15 along the maximum detector stroke sm, detector 15 determines the value of the pressure predetermined by the pressure operating element 42 in the main pipeline 5. In an embodiment, the position element 45 is a slider of detector 15 configured as a potentiometer. However, it is also possible to specify that the position element is a magnet of detector configured as a Hall sensor. Figure 12 The position element 45 is shown in the case of the pressure-operated element 42 not being manipulated. Figure 13 The position element 45 is shown when the pressure operating element 45 is manipulated to its maximum extent. Based on the manipulation of the pressure operating element 45, the position element 45 is adjusted along the maximum detector stroke sm by the detector stroke s. Here, the position element 45 moves relative to the measuring unit of the detector 15, and in this embodiment, relative to the coil. The position change of the position element 45 is detected by the measuring unit of the detector 15. The mechanical connection element 44 mechanically connects the position element 45 and the pressure operating element 42 to each other.

[0049] Especially Figures 5 to 7As shown, the pressure operating element 42 is adjustable along the adjustment stroke within the adjustment range 31 from a rest position 37 to an adjustment position with an increased gap relative to the rest position 37. The pressure operating element 42 occupies the maximum gap relative to the rest position 37 in the end position 38. In the end position 38, the pressure operating element has passed the maximum adjustment stroke wm. The high-pressure cleaning appliance 1 is designed such that as the gap of the pressure operating element 42 relative to the rest position 37 increases, the pressure of the liquid in the section of the main pipeline 5 between the high-pressure pump 3 and the jet opening 6, particularly in the pressure space 10, increases or at least does not decrease. In an embodiment, the high-pressure cleaning appliance 1 is designed such that as the gap of the pressure operating element 42 relative to the rest position 37 increases, the bypass valve 13 decreases and / or at least does not increase the free cross-sectional area of ​​the bypass pipeline 12. A smaller volume of liquid delivered by the high-pressure pump 3 can flow back from the pressure space 10 to the suction space 9 through the bypass pipeline 12. In the end position 38, the pressure in the section of the main pipeline 5 between the high-pressure pump 3 and the injection opening 6, especially in the pressure space 10, is at its maximum for the fully open state 40 of the main pipeline valve 8.

[0050] It is possible to specify that the pressure remains constant along the adjustment stroke. Specifically, the high-pressure cleaning appliance 1 can be designed such that the free cross-sectional area of ​​the bypass line 12 remains the same along a section of the adjustment stroke, i.e., in multiple adjacent adjustment positions. In this way, multiple different pressure levels can be provided. Such pressure levels can be selected by adjusting the pressure operating element 42 in the adjustment position within the section of the adjustment stroke where the free cross-sectional area of ​​the bypass line remains the same. Multiple pressure levels can be set.

[0051] The spacing relative to the rest position 37 relates to the spacing of reference points on the pressure operating element 42. In an embodiment, the pressure operating element 42 is a pivot rod pivotable about a pivot axis 52 of the pressure operating element. In an embodiment, the reference point is a point on the pressure operating element 42 having the maximum spacing relative to the pivot axis 52 of the pressure operating element. This point is referred to as the pressure point 54 and... Figures 9 to 11 As shown in the diagram, pressure point 54 is arranged on the operator-operated side of pressure operating element 42 relative to the pivot axis 52 of the pressure operating element. The corresponding distance between pressure point 54 and the pivot axis 52 of the pressure operating element is referred to as the maximum pressure distance d. In an embodiment, the rest position 37 is defined by the position of a reference point when the pressure operating element 42 is not operated.

[0052] When the pressure operating element 42, configured as a pivot, is operated in its rest position 37, the pressure operating element 42—and therefore the reference point—pivots within the adjustment range 31 along the adjustment stroke. In this case, the adjustment stroke is a circular segment. The distance of the pressure operating element 42 relative to the rest position 37 corresponds to the distance measured by the reference point relative to the rest position 37 along the adjustment stroke configured as a circular segment. For better representativeness, the adjustment stroke is... Figures 9 to 11 The points are arranged radially slightly offset from pressure point 54. In fact, the arc segment line originates from... Figure 9 The pressure point 54 extends from its position. The pivoting motion of the pressure point 54 about the pivot axis 52 of the pressure operating element moves on a circular trajectory. It can also be specified that the pivoting motion about the pivot axis 52 of the pressure operating element is measured in the form of an angular distance between a reference point and its rest position.

[0053] The pressure operating element 42 can be adjusted along the maximum adjustment stroke wm. Figures 5 to 7 as well as Figure 9 and Figure 11 The maximum adjustment stroke wm of the pressure operating element 42 is at least 110%, particularly at least 150%, and particularly at least 200% of the maximum detector stroke sm of the position element 45. The movement of the pressure operating element 42 along its adjustment stroke is converted into the movement of the position element 45 along its adjustment stroke. Here, the pivoting movement of the pressure operating element 42 is converted into the linear movement of the position element 45. For this purpose, the mechanical connection element 45 includes multiple hinges.

[0054] The high-pressure cleaning appliance 1 is designed such that the bypass valve 13 sets the size of the free cross-sectional area of ​​the bypass line 12 according to the adjustment position of the pressure operating element 42. To this end, the detector 15 detects the adjustment position of the pressure operating element 42 and generates a signal, based on which the bypass valve 13 is adjusted.

[0055] In this embodiment, the operating device 7, particularly the pressure operating element 42 and the valve operating element 41, protrudes from the gripping area 14. The gripping area 14 is particularly defined Figure 8The gripping opening 29 is shown. The gripping opening 29 penetrates the injection unit 11 completely, particularly along the direction of the pivot axis 52 of the pressure actuating element and particularly along the direction of the pivot axis 51 of the valve actuating element. When gripping and / or holding the injection unit 11, the operator uses their hand, particularly one or more, especially three-jointed fingers, through the gripping opening 29. The gripping opening 29 is defined by a hand guard 32 on the side opposite to the gripping area 14. The gripping opening 29 has a completely circumferential edge. In the embodiment, the operating device 7, particularly the pressure actuating element 42 and the valve actuating element 41, extends into the gripping opening 29. This is especially true in the unoperated state of the operating device 7.

[0056] In this embodiment, the valve operating element 41 is circumferential. Figures 9 to 11 The illustrated valve operating element pivots on its pivot axis 51. Specifically, the pressure operating element 42 is pivotable around... Figures 9 to 11 The pivot rod of the pivot axis 52 of the pressure operating element shown is pivoted.

[0057] The valve operating element 41 has a valve point 53. The valve point 53 is a point on the valve operating element 41 that is positioned relative to the valve operating element's pivot axis 51 on the side of the valve operating element 41 facing the gripping area 14 and having a maximum valve distance v relative to the valve operating element's pivot axis 51. Specifically, the valve point 53 is a point on the valve operating element 41 that is positioned relative to the valve operating element's pivot axis 51 on the side of the valve operating element 41 facing the gripping area 14, has a maximum valve distance v relative to the valve operating element's pivot axis 51, and can be operated with a finger even when the valve operating element 41 is not operated. In other words, the valve point 53 is not obstructed by other components, especially not by the housing defining the gripping opening 29, so that the valve point can be reached with a finger.

[0058] Pressure operating element 42 has Figures 9 to 11 The pressure point 54 is shown. Pressure point 54 is a point on the pressure operating element 42 that is positioned relative to the pivot axis 52 of the pressure operating element 42 on the side of the pressure operating element 42 facing the gripping area 14 and having a maximum pressure distance d relative to the pivot axis 52. Pressure point 54 is specifically a point on the pressure operating element 42 having a maximum pressure distance d relative to the pivot axis 52.

[0059] The maximum valve spacing v is greater than the maximum pressure spacing d. Therefore, the valve operating element 41 can be operated by the user using a larger lever arm than the pressure operating element 42. In an embodiment, the maximum valve spacing v is at least 150%, and particularly at least 200%, of the maximum pressure spacing d.

[0060] like Figures 2 to 4 And especially Figures 9 to 11 As can be seen, the valve operating element 41 has a recess 43. A pressure operating element 42 is at least partially received in the recess 43. Specifically, the pressure operating element 42 protrudes from the valve operating element 41 through the recess 43. Specifically, the pressure operating element 42 extends from the recess 43 into the gripping opening 29. The recess 43 has an edge. The edge surrounds the valve operating element 41 in a closed manner. The edge surrounds the pressure operating element 42 in a particularly closed manner. The edge defines an opening surface of the recess. The pressure operating element 42 is inserted into the valve operating element 41 through the opening surface. When the pressure operating element 42 is operated to its maximum extent, i.e., when the pressure operating element 42 is pivoted to its maximum extent toward the valve operating element 41 and, in particular, when the valve operating element itself is operated to its maximum extent, the pressure operating element 42 almost completely disappears into the valve operating element 41. Specifically, the pressure operating element 42 is integrated into the valve operating element 41. When the pressure operating element 42 is pressed, the same finger can not only rest against the pressure operating element 42 with a portion of the finger, but also rest against the valve operating element 41 with another portion of the finger. Here, the pressure operating element 42 is submerged in the empty portion 43 of the valve operating element 41.

[0061] In this embodiment, the pressure actuating element 42 is pivotally supported at the valve actuating element 41. The pressure actuating element pivot axis 52 extends through the valve actuating element 41. Specifically, the pressure actuating element pivot axis 52 is arranged at a distance a relative to the valve actuating element pivot axis 51. During pivoting movement of the valve actuating element 41 about the valve actuating element pivot axis 51, the pressure actuating element pivot axis 52 pivots together with the valve actuating element 41. The pressure actuating element pivot axis 52 is arranged relative to the valve actuating element pivot axis 51 on the side of the valve actuating element 41 facing the gripping area 14. When the operating device 7 is transferred from an unoperated state to a fully operated state (when not only the valve actuating element 41 but also the pressure actuating element 42 is operated to the maximum extent), the pressure point 54 of the pressure actuating element follows a trajectory resulting from the superposition of the two pivoting movements. On the one hand, the pressure actuating element pivot axis 52 pivots about the valve actuating element pivot axis 51; on the other hand, the pressure point 54 pivots about the pressure actuating element pivot axis 52. Therefore, pressure point 54 pivots not only around valve operating element pivot axis 51, but also around pressure operating element pivot axis 52.

[0062] The high-pressure cleaner 1 is designed so that the user can hold the handheld jet unit 11 by wrapping one hand around the gripping area 14 and simultaneously operate the operating element 7 using only three joints of the same hand. This is in Figure 8 As shown in the figure. It can also be specified that the high-pressure cleaning appliance 1 is designed such that the user can hold the handheld jet unit 11 by using one hand to wrap around the gripping area and at the same time use only a single three-joint finger of the same hand, especially the index finger, to operate the operating elements.

[0063] like Figure 8 As shown, the user's single hand is used to grip the gripping area 14. The hand has a thumb 61. The thumb 61 is a two-jointed finger. The hand has four three-jointed fingers. The three-jointed fingers are the index finger 62, middle finger 63, ring finger 64, and little finger 65.

[0064] The gripping area 14 has a thumb side 33 and an operating element side 34. Operating devices 7, particularly a valve operating element 41 and a pressure operating element 42, are arranged on the operating element side 34. The thumb side 33 of the gripping area 14 is configured to abut against the thumb 41. The operating element side 34 is configured to abut against the three-jointed fingers 62, 63, 64, and 65. The thumb side 33 and the operating element side 34 are opposite each other. The gripping area 14 extends along the longitudinal axis 48 of the handle. The longitudinal axis 48 of the handle extends between the thumb side 46 and the operating element side 47 in a side view of the gripping area 14. The gripping area 14 is essentially rod-shaped. In particular, the longitudinal axis 48 of the handle extends in the longitudinal direction of the gripping area 14. The longitudinal axis 48 of the handle extends particularly linearly. The longitudinal axis 48 of the handle does not intersect the gripping area 14 configured to abut against the fingers. The longitudinal axis 48 of the handle extends approximately centrally through the gripping area 14. The longitudinal axis 48 of the handle extends approximately, and particularly precisely, parallel to the handle surface of the valve operating element 41 in the fully operated state of the valve operating element 41.

[0065] During liquid injection, the injection unit 11 can be held using a single hand. Here, the gripping area 14 can be gripped using all fingers 61, 62, 63, 64, 65, and especially the thumb 61. It is not necessary to use the thumb 61 to adjust the pressure of the main pipeline 5 in the section between the high-pressure pump 3 and the injection opening 6.

[0066] The middle finger 63, ring finger 64, and little finger 65 rest against the valve operating element 41. The valve operating element 41 can be operated by means of the middle finger 63, ring finger 64, and little finger 65.

[0067] The extension of the pressure actuating element 42 along the longitudinal axis 48 of the handle is less than the extension of the valve actuating element 41 along the longitudinal axis 48 of the handle. The extension of the pressure actuating element 42 along the longitudinal axis 48 of the handle is at most 50%, and more specifically at most 30%, of the extension of the valve actuating element 41 along the longitudinal axis 48 of the handle.

[0068] The grip opening 29 has an opening length l measured along the longitudinal axis 48 of the handle. The opening length l corresponds in particular to the maximum spacing of the edge region segment of the grip opening 29 measured along the longitudinal axis 48 of the handle. The valve operating element 41 extends at least over the entire opening length l. The valve operating element 41 extends at most 150%, particularly 130%, of the opening length l. The pressure operating element 42 extends at most 50%, particularly at most 30%, of the opening length l. The pressure operating element 42 extends at least 10% of the opening length l. Thus, the pressure operating element 42 can be operated using the index finger 62, and the valve operating element 41 can be operated simultaneously using the middle finger 63, ring finger 64, and / or little finger 65 of the same hand. The pressure point 54 of the pressure operating element 42 ( Figure 9 The valve point 53 of the valve operating element 41 is located closer to the valve operating element pivot axis 51 than the valve point 53 of the valve operating element 41. In particular, the pressure operating element 42 extends from the upper edge of the gripping opening 29, which is located closer to the valve operating element pivot axis 51 than the opposite lower edge of the gripping opening 29.

[0069] The index finger 62 rests against the pressure operating element 42. The pressure operating element 42 can be operated using the index finger 62. The pressure operating element 42 can be operated solely using the index finger 62. The high-pressure cleaning appliance 1 is designed such that the pressure in the section of the main pipeline 5 between the high-pressure pump 3 and the spray opening 6 can be set individually using a single three-jointed finger, in this embodiment, the index finger 62. Simultaneously, the same hand can be used to hold and guide the spray unit 11. Liquid can be sprayed comfortably and safely while operating the pressure operating element 42. The thumb 61 can be used to safely hold the spray unit 11. The thumb 61 does not need to be used to operate buttons or levers.

[0070] The high-pressure cleaning appliance 1, especially the jet unit 11, is designed such that, during the use of the high-pressure cleaning appliance 1, the user can operate the device 7 by using only three fingers 62, 63, 64, 65 of the same hand to switch the main pipeline valve 8 between the fully open state 40 and the closed state 20, and also to adjust the pressure in the pressure space 10, especially to adjust the bypass valve 13.

[0071] exist Figures 5 to 7 The use of the operating device 7 is shown in chronological order, beginning in the unoperated state 30 of the operating device 7, especially in the unoperated state of the pressure operating element 42. Figure 5 The main pipeline valve 8 is in the closed state 20, and ends in the fully operated state 50 of the operating device 7. Figure 7 In the fully open state 40 of the main pipeline valve 8 and the fully closed bypass valve 13, in this fully operated state, not only the valve operating element 41, but also the pressure operating element 42 is fully, especially to the maximum extent, operated.

[0072] exist Figure 5 In this state, operating device 7 is in the unoperated state 30. Valve operating element 41 and pressure operating element 42 are not operated. Main line valve 8 is closed. Liquid is not ejected from injection port 6. Bypass valve 13 is fully open. Therefore, the pressure in pressure space 10 is minimized relative to the closed state 20 of main line valve 8.

[0073] From operating device 7 Figure 5 Starting from the unoperated state 30 shown, the valve operating element 41 of the operating device 7 is first operated. As a result, the main pipeline valve 8 is transferred from the closed state 20 to the open state 40.

[0074] exist Figure 6 The diagram illustrates a semi-operated state 60 of the operating device 7, in which only the valve operating element 41 is operated, and the pressure operating element 42 is not operated. Liquid is ejected from the injection port 6. The pressure operating element 42 is not operated. The bypass valve 13 is fully open. The pressure in the section of the main pipeline 5 between the high-pressure pump 3 and the injection port 6, or the pressure in the pressure space 10, is minimal for the fully open state 40 of the main pipeline valve 8.

[0075] From operating device 7 Figure 6 The semi-operational state 60 shown transitions to the operating device 7. Figure 7 In the fully operated state 50 shown, valve operating element 41 continues to be operated. Main line valve 8 remains fully open 40. Pressure operating element 42 is slightly actuated, particularly in an adjustment position between the unoperated and fully operated states. Pressure operating element 42 occupies the rest position 37. Figure 6 ) and end position 38 ( Figure 7 The bypass valve 13 is neither fully open nor fully closed, but partially open. The pressure in the section of main pipeline 5 between high-pressure pump 3 and injection opening 6, or the pressure in pressure space 10, is greater than... Figure 6 The pressure is less than Figure 7 The pressure within.

[0076] exist Figure 7In the middle, pressure operating element 42 is adjusted to end position 38. Bypass valve 13 is fully closed. Liquid can no longer flow back from pressure space 10 to suction space 9 through bypass line 12. The pressure in pressure space 10 is at its maximum relative to the open state 40 of main line valve 8. Valve operating element 41 remains fully actuated. Main line valve 8 remains in the fully open state 40. Operating device 7 is in the fully actuated state 50. Liquid is injected from injection port 6 at maximum pressure.

[0077] from Figure 7 Starting from the state shown in the figure, Figures 7 to 5 The states shown can proceed in reverse order until... Figure 5 The state shown is to terminate the injection of liquid from the injection port 6. Here, firstly, the pressure operating element 42 is released, causing the pressure in the pressure space 10 to drop again as the bypass valve 13 is continuously opened. Finally, the operation of the valve operating element 41 is terminated, thereby closing the main pipeline valve 8 and ending the injection process. The bypass valve 13 is then fully opened, ensuring pressure balance between the pressure space 10 and the suction space 9.

[0078] High-pressure cleaning equipment 1 has Figures 5 to 7 The control unit 22 is shown. Control unit 22 is arranged in pump unit 18. Alternatively, control unit 22 can be arranged in injection unit 11. The signal generated by detector 15 is transmitted directly or indirectly, especially wirelessly, especially electromagnetically, to control unit 22. The signal received by control unit 22 is used to change, especially set, the pressure in the section of main pipeline 5 between high-pressure pump 3 and injection opening 6, especially by means of bypass valve 13 to adjust the free cross-sectional area of ​​bypass pipeline 12. For this purpose, control unit 22 sends an additional signal to bypass valve 13.

[0079] The bypass valve 13 can be adjusted by means of a servo motor 16. The servo motor 16 is arranged in the pump unit 18. By means of the servo motor 16, the bypass valve 13 can be adjusted such that the free cross-sectional area of ​​the bypass line 12 can be set. Based on the signal received by the control unit 22 from the detector 15, another signal is generated in the control unit 22 and transmitted to the servo motor 16. In this embodiment, the other signal is transmitted electrically by means of a cable. However, it is also possible to specify that the other signal is transmitted wirelessly, especially electromagnetically. Based on the other signal, the servo motor 16 adjusts the bypass valve 13. By means of the servo motor 16, the bypass valve 13 can be adjusted such that the size of the free cross-sectional area of ​​the bypass line 12 can be continuously adjusted. The size of the free cross-sectional area can be continuously adjusted at least partially by means of the operating device 7, especially by means of the pressure operating element 42.

[0080] In one embodiment, the main pipeline valve 8 is mechanically opened via valve actuation element 41. In another embodiment, the main pipeline valve 8 includes... Figures 9 to 11 The valve spring 73, valve mechanism 74, and valve seat 75 are shown. The valve spring 73 preloads the valve mechanism 74 against the valve seat 75. In the unoperated state of the valve operating element 41, the valve spring 73 presses the valve mechanism 74 against the valve seat 75. The main line valve 8 is in the closed state 20. When the valve operating element 41 is operated, the following force acts on the main line valve 8, which moves the main line valve 8 from the closed state 20 to the fully open state 40. The valve operating element 41 acts on the valve stem 76 of the main line valve 8, particularly its side away from the gripping area 14 relative to the valve operating element pivot axis 51, and particularly its longitudinal end. The valve stem 76 causes the valve mechanism 74 to move away from the valve seat 75 against the force of the valve spring 73, and in this way moves the main line valve 8 to the fully open state 40. The liquid can then flow through the main line 5 to the injection opening 6.

[0081] In this embodiment, the control unit 22 receives a signal as the valve operating element 41 is actuated. The control unit 22 only allows a change in pressure due to the actuation of the pressure operating element 42 if it simultaneously receives a signal caused by the actuation of the valve operating element 41. However, it is also possible to specify that pressure adjustment can be performed independently of the actuation of the valve operating element 41.

[0082] The high-pressure cleaning appliance 1, particularly the motor 4 of the pump unit 18, has two operating states. These two operating states are an on state and a off state. In the off state, the motor 4 is off. No electrical power is provided for operating the motor 4. In the on state, the motor 4 is on. In the on state 30, the motor 4 is driven by electrical power.

[0083] In all embodiments, the high-pressure cleaning appliance 1, particularly the spray unit 11, is designed such that the motor 4 can be set to one of two operating states by means of the operating device 7, particularly by means of the valve operating element 41. The motor 4 can be adjusted from the off state to the on state by means of the operating device 7, particularly by means of the valve operating element 41. The motor 4 can be adjusted from the on state to the off state by means of the operating device 7, particularly by means of the valve operating element 41.

[0084] In all embodiments, the high-pressure cleaning appliance 1, particularly the spray unit 11, is structurally designed such that the operating state of the motor 4 can only be adjusted when the main pipeline valve 8 is in the fully open state 40. The motor 4 can only transition from the closed state to the open state when the main pipeline valve 8 is in the fully open state 40. The motor 4 can only transition from the open state to the closed state when the valve 8 is in the fully open state 40.

[0085] The high-pressure cleaning appliance 1, especially the spray unit 11, is structurally designed in all embodiments such that the valve state of the main pipeline valve 8 can only be adjusted when the motor 4 is in the off state. The main pipeline valve 8 can only transition from the closed state 20 to the fully open state 40 when the motor 4 is in the off state. The main pipeline valve 8 can only transition from the fully open state 40 to the closed state 20 when the motor 4 is in the off state.

[0086] The high-pressure cleaning appliance 1, especially the spray unit 11, is designed in all embodiments to allow electrical signals to be generated directly by operating the device 7, especially directly by operating the valve element 41. In embodiments, the electrical signal is generated by allowing or blocking the flow of current. Here, the operation... Figures 9 to 11 The switch 21 shown closes or opens a current loop and thus allows or prevents current flow. In this embodiment, switch 21 is a microswitch. However, it is also possible to specify that a potentiometer is used instead of switch 21. The resistance of the potentiometer is then changed by manipulating the operating device 7, in particular the valve operating element 41, so that current can or cannot flow through the current loop in which the potentiometer is arranged.

[0087] The operating device 7, particularly the valve operating element 41, in this embodiment mechanically acts on the switch 21 and directly generates an electrical signal in this manner. The obstruction of current flow is also referred to as the generation of an electrical signal or simply an electrical signal.

[0088] Because of the electrical signal generated directly by the operating device 7, especially by the valve operating element 41, the motor 4 can be set to at least one of two operating states in all embodiments. The electrical signal can be an on signal. The electrical signal can be an off signal. If the operating device 7, especially the valve operating element 41, generates an on signal in an embodiment, it allows current to flow in the current loop. If the operating device 7, especially the valve operating element 41, generates an off signal in an embodiment, it prevents current from flowing in the current loop.

[0089] Motor 4 transitions from its off state to its on state due to the generation of an electrical on signal. Motor 4 transitions from its on state to its off state due to the generation of an electrical off signal.

[0090] In all embodiments, the high-pressure cleaning appliance 1 is designed such that the motor 4 is set to one of two operating states by means of an electrical signal generated directly by the operating device 7, especially by the valve operating element 41, without relying on the pressure relationship in the main pipeline 5.

[0091] If motor 4 is in its on state and main line valve 8 is in its fully open state 40, then in all embodiments, liquid is delivered from connector 2 through main line 5 to spray opening 6. This state is achieved by means of operating the operating device 7, especially by means of operating the valve operating element 41. Before the high-pressure cleaning appliance 1 is started, motor 4 is in the off state. Operating device 7, especially valve operating element 41, is not operated. Main line valve 8 is in the closed state 20. This state of the high-pressure cleaning appliance 1 is... Figure 5 or Figure 9 As shown in the diagram, when the main pipeline valve 8 is closed and the motor 4 of the high-pressure pump 3 is off, liquid is not transported through the main pipeline 5.

[0092] According to Figures 5 to 7 or Figures 9 to 11 In this embodiment, the main pipeline valve 8 is controlled by means of the valve operating element 41. Figure 5 or Figure 9 The closed state 20 shown in the figure transitions to its current state. Figure 6 and Figure 7 or Figure 8 and Figure 9 The fully open state 40 is shown. Only after the main pipeline valve 8 is opened is an electrical signal triggered by the valve operating element 41 to transfer the motor 4 from its closed state to its open state. The high-pressure cleaning appliance 1 is designed such that the motor 4 can only be set to the open state after the main pipeline valve 8 has ended its closed state 20. According to... Figures 9 to 11 In this embodiment, the valve operating element 41 has a switching arm 24. The switching arm 24 switches the switch 21 in the described manner and sequence. When the valve operating element 41 is operated, the switching arm 24, as part of the valve operating element 41, pivots about the valve operating element pivot axis 51. During this pivoting movement, the closed state 20 of the main pipeline valve 8 is first ended, i.e., the main pipeline valve 8 is opened, and then the switch 21 is switched by means of the switching arm 24. In this embodiment, the switch 21 is pressed, especially by means of the switching arm 24, when the valve operating element 41 is not operated. When the switch is pressed, the power supply to the motor 4 is interrupted. After the valve operating element 41 has pivoted, i.e., when the valve operating element 41 is operated, the switching arm 24 is moved away from the switch 21 so that the switch 21 is no longer pressed. Power is supplied to the motor 4 only when the switch 21 is not pressed. The high-pressure pump 3 delivers liquid only when the main pipeline valve 8 is open, especially in the fully open state 40. When the valve operating element 41 is released, the switch 21 is first pressed by means of the switching arm 24, and the electrical power supply to the motor 4 is interrupted. Then the valve operating element 41 operates the main pipeline valve 8 and moves the main pipeline valve to the closed state 20.

[0093] The switching arm 24 is a protrusion of the valve operating element 41. The switching arm 24 is arranged on the side of the valve operating element 41 facing the gripping area 14 relative to the valve operating element pivot axis 51. The main pipeline valve 8 is switched using the side of the valve operating element 41 away from the gripping area 14 relative to the valve operating element axis 41, particularly using the longitudinal end of the valve operating element 41. The valve operating element axis 41 is functionally arranged between the switching arm 24 and the longitudinal end of the valve operating element 41 for switching the main pipeline valve 8. The valve operating element 41 is pivotally supported in the injection unit 11, particularly in the housing of the injection unit 11, about the valve operating element pivot axis 51.

Claims

1. A high-pressure cleaning device, comprising: - Connector (2) for liquid source (17); - High-pressure pump (3); - Main pipeline (5), through which liquid can be transported from the connector (2) to the injection opening (6) of the main pipeline (5) by means of the high pressure pump (3). - Main pipeline valve (8), which is arranged in the main pipeline (5); as well as - Operating the equipment (7). The main pipeline valve (8) prevents liquid flow through the main pipeline (5) in the closed state (20), and allows liquid flow through the main pipeline (5) in the fully open state (40). The main pipeline valve (8) can be switched between the fully open state (20) and the closed state (40) by means of the operating device (7). The operating device (7) is characterized by having a valve operating element (41) and a pressure operating element (42), wherein the pressure operating element (42) is operable independently of the valve operating element (41), the main pipeline valve (8) is switchable between the fully open state (40) and the closed state (20) by means of the valve operating element (41), and the pressure of the liquid in the section of the main pipeline (5) between the high-pressure pump (3) and the injection opening (6) is pre-set by means of the pressure operating element (42).

2. The high-pressure cleaning device according to claim 1, Its features are, The high-pressure cleaning appliance (1) has a handheld spray unit (11), the spray opening (6) is arranged at the handheld spray unit (11), and the operating device (7) is arranged at the handheld spray unit (11).

3. The high-pressure cleaning device according to claim 2, Its features are, The handheld injection unit (11) has a gripping area (14) that the user can guide when gripping the gripping area (14), and the valve operating element (41) and the pressure operating element (42) can be operated together by the user's single hand when gripping the gripping area (14).

4. The high-pressure cleaning device according to claim 2, Its features are, The handheld injection unit (11) has a gripping area (14) that the user can guide when gripping the gripping area (14), and the valve operating element (41) and the pressure operating element (42) can be operated together by a single finger of the user when gripping the gripping area (14).

5. The high-pressure cleaning device according to claim 3, Its features are, The pressure-operating element (42) can be operated with a single three-joint finger when the gripping area (14) is surrounded, and the valve-operating element (41) can be operated with another three-joint finger of the same hand while the pressure-operating element (42) is operated with the single three-joint finger.

6. The high-pressure cleaning device according to claim 1, Its features are, The valve operating element (42) is a pivot rod that can pivot about a valve operating element pivot axis (51), the pressure operating element (42) is a pivot rod that can pivot about a pressure operating element pivot axis (52), the valve operating element (41) has a valve point (53) arranged with a maximum valve spacing (v) relative to the valve operating element pivot axis (51), the pressure operating element (42) has a pressure point (54) arranged with a maximum pressure spacing (d) relative to the pressure operating element pivot axis (52), and the maximum valve spacing (v) is greater than the maximum pressure spacing (d).

7. The high-pressure cleaning device according to claim 1, Its features are, The valve operating element (41) has a vacancy (43), and the pressure operating element (42) is at least partially received in the vacancy (43).

8. The high-pressure cleaning device according to claim 1, Its features are, The valve operating element (41) has a recess (43), and the pressure operating element (42) protrudes through the recess (43).

9. The high-pressure cleaning device according to claim 1, Its features are, The pressure operating element (42) is pivotally supported at the valve operating element (41).

10. The high-pressure cleaning appliance according to claim 1, Its features are, The pivot axis (52) of the pressure operating element is arranged at a distance (a) relative to the pivot axis (51) of the valve operating element.

11. The high-pressure cleaning appliance according to claim 1, Its features are, The high-pressure cleaning appliance (1) has a motor (4) for driving the high-pressure pump (3), the motor (4) having a closed state and an open state, the motor (4) being adjustable between the closed state and the open state by means of the valve operating element (41).

12. The high-pressure cleaning appliance according to claim 1, Its features are, The high-pressure cleaning appliance (1) includes a detector (15), and the detector (15) is designed to detect the adjustment position of the pressure operating element (42).

13. The high-pressure cleaning appliance according to claim 12, Its features are, A mechanical connection element (44) is arranged between the detector (15) and the pressure operating element (42). The detector (15) determines the value of the pressure in the main pipeline (5) predetermined by the pressure operating element (42) based on the detector stroke (s) traversed by the position element (45) of the detector (15). The position element (45) is adjustable along the maximum detector stroke (sm), and the pressure operating element (42) is adjustable along the maximum adjustment stroke (wm), and the maximum adjustment stroke (wm) corresponds to at least 110% of the maximum detector stroke (sm).

14. The high-pressure cleaning appliance according to claim 1, Its features are, The main pipeline (5) has a suction space (9) between the connector (2) and the high-pressure pump (3), and the main pipeline (5) has a pressure space (10) between the high-pressure pump (3) and the injection opening (6). The pressure space (10) is fluidly connected to the suction space (9) through a bypass pipeline (12). A bypass valve (13) is arranged in the bypass pipeline (12). By means of the bypass valve (13), the free cross-sectional area of ​​the bypass pipeline (12) can be set for adjusting the pressure in the pressure space (10). The bypass valve (13) can be adjusted by means of the pressure operating element (42) for setting the free cross-sectional area of ​​the bypass pipeline (12).

15. The high-pressure cleaning appliance according to claim 1, Its features are, The pressure of the liquid in the section of the main pipeline (5) between the high-pressure pump (3) and the injection opening (6) can be continuously and pre-set by means of the pressure operating element (42).

16. The high-pressure cleaning appliance according to claim 1, Its features are, The high-pressure cleaning appliance (1) is structurally designed such that the operating state of the motor (4) can be adjusted between the closed state and the open state only when the main pipeline valve (8) is in the fully open state (40).

17. A handheld spray unit (11) for a high-pressure cleaning appliance, wherein, The high-pressure cleaning device (1) includes: - Connector (2) for liquid source (17); - High-pressure pump (3); - A main pipeline (5) through which liquid can be transported from the connector (2) to the injection opening (6) of the main pipeline (5) by means of the high-pressure pump (3); and - Main pipeline valve (8), which is arranged in the main pipeline (5), The main pipeline valve (8) prevents liquid flow through the main pipeline (5) in the closed state (20), and allows liquid flow through the main pipeline (5) in the fully open state (40). The handheld injection unit (11) has an operating device (7) for switching between the fully open state (40) and the closed state (20). The operating device (7) is characterized by having a valve operating element (41) for switching the main pipeline valve (8) between the fully open state (40) and the closed state (20), and having a pressure operating element (42) for pre-setting the pressure of the liquid in the section of the main pipeline (5) between the high-pressure pump (3) and the injection opening (6), and the pressure operating element (42) being able to operate independently of the valve operating element (41).

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