EP2747908A1 - Hochdruckreinigungsgerät - Google Patents
HochdruckreinigungsgerätInfo
- Publication number
- EP2747908A1 EP2747908A1 EP11748672.0A EP11748672A EP2747908A1 EP 2747908 A1 EP2747908 A1 EP 2747908A1 EP 11748672 A EP11748672 A EP 11748672A EP 2747908 A1 EP2747908 A1 EP 2747908A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- line
- cleaning
- cleaning liquid
- cleaning device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
- B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor
Definitions
- the invention relates to a high-pressure cleaning device having a supply port for supplying cleaning fluid and a pressure port for dispensing cleaning fluid and with an electrical connection connected to the supply port electrical heating device for heating and a driven by a motor pump, a suction line and a pressure line wherein the suction line via a first solenoid valve cold cleaning liquid and heated via a second solenoid valve cleaning liquid can be fed, and wherein the solenoid valves are controlled by a control device.
- a cleaning liquid preferably water
- the high-pressure cleaning device has an electric heater.
- About a first solenoid valve is the suction line of the pump cold cleaning fluid and a second solenoid valve is the suction line heated cleaning fluid available. If pressurized cold cleaning fluid is to be dispensed, the first solenoid valve is energized so that it assumes its open position and cold cleaning fluid can be supplied to the suction line via the first solenoid valve. If pressurized heated liquid is to be dispensed, instead of the first solenoid valve, the second solenoid valve is energized.
- the second solenoid valve then assumes its open position, and cleaning liquid previously heated by the electric heater is supplied to the suction line of the pump.
- the control of the solenoid valves by means of a control device of the high-pressure cleaning device.
- the control device has a selector switch with which the user can select whether cold cleaning fluid or heated cleaning fluid should be pressurized. In a first switching position of the selector switch, the first solenoid valve is energized and in a second switching position of the selector switch, the second solenoid valve is energized. Supplying the solenoid valves with power causes the solenoid valves to heat up. It must therefore be ensured that the heating does not lead to a malfunction of the solenoid valves.
- Object of the present invention is to develop a high-pressure cleaning device of the type mentioned in such a way that it is CADsunwormer and can be produced inexpensively.
- the idea flows in that an energization of the solenoid valves is required only if the user actually desired the delivery of pressurized cleaning liquid.
- a pressure hose is connected to the pressure port, which has at its free end a device for dispensing pressurized cleaning fluid, such as a spray gun.
- the device for dispensing cleaning fluid usually has an outlet valve, which are opened and closed by the user as needed can.
- the user opens the dispensing valve. This has the consequence that at least one state variable of the cleaning fluid in the pressure line assumes a certain value. The value of the state quantity of the cleaning liquid in the pressure line is thus a measure of whether or not actually put under pressure cleaning liquid.
- a state variable of the cleaning fluid in the pressure line is used to control the solenoid valves. This makes it possible to apply power to the solenoid valves only when, in fact, cleaning fluid is to be discharged from the high-pressure cleaning device, otherwise it can be dispensed with a current application of the solenoid valves.
- the heating of the solenoid valves can be kept low. This allows the use of inexpensive solenoid valves and has the additional advantage that the high-pressure cleaner is less sensitive to interference.
- a state variable of the cleaning liquid located in the pressure line for example, its flow rate can be used. If the user releases the release of pressurized cleaning fluid, then the cleaning fluid flows through the pressure line. If the user interrupts the delivery of pressurized cleaning liquid, the flow of the cleaning liquid in the pressure line is interrupted. The flow rate of the cleaning fluid flowing through the pressure line can thus be used as a measure of whether cleaning fluid is actually discharged from the high-pressure cleaning device. The flow rate of the cleaning liquid in the pressure line can thus be used as a state variable for the control of the solenoid valves.
- the state variable used is the pressure of the cleaning fluid prevailing in the pressure line for controlling the solenoid valves. This will be explained in more detail below. It is advantageous if not only the solenoid valves but also the pump in response to a state variable of the cleaning fluid located in the pressure line is controllable. This gives the possibility of putting the pump into operation only when the delivery of pressurized cleaning fluid is actually desired. Otherwise the pump can be switched off. This reduces the energy consumption of the high-pressure cleaner and reduces the risk of interference.
- the solenoid valves and preferably also the pump are controllable in dependence on the pressure prevailing in the pressure line of the cleaning liquid.
- the pump can only be activated after the current application of the first solenoid valve or the second solenoid valve has started.
- the solenoid valves assume their open position as soon as they are energized.
- the pump can preferably be put into operation only after previously the current application of the first solenoid valve or the second solenoid valve has started. At the time of activation of the pump thus takes the first solenoid valve or the second solenoid valve already in its open position, so that the pump is already supplied at the beginning of their operation with cleaning fluid. Damage to the pump due to lack of cleaning fluid is reliably prevented.
- At least one signal generator is arranged in the pressure line, which detects a state variable of the cleaning liquid located in the pressure line and is connected to the control unit via a signal line.
- a signal generator for example, a sensor may be used, which detects a state variable of the cleaning liquid located in the pressure line, for example, the pressure or the flow rate.
- a pressure switch can be provided. It is advantageous if, when a maximum value of the pressure prevailing in the pressure line is exceeded, the magnetic valves can be closed and opened when the pressure falls below a minimum value of the pressure prevailing in the pressure line.
- the current applied to the solenoid valves can be interrupted as soon as a maximum value of the pressure prevailing in the pressure line is exceeded.
- the solenoid valves then automatically assume their closed position until after the value falls below the minimum value of the pressure prevailing in the pressure line of the cleaning liquid, the current application is resumed. If the user interrupts the delivery of pressurized cleaning liquid while the pump is in operation by closing an outlet valve, this leads to a strong pressure increase in the pressure line. This has the consequence that a maximum value of the pressure is exceeded. Exceeding the maximum value is thus a measure that the user does not want to release pressurized cleaning fluid.
- the current applied to the solenoid valves can therefore be interrupted so that they automatically assume their closed position.
- the user later wishes to return pressurized cleaning fluid he opens the outlet valve. This has the consequence that the pressure in the pressure line drops. If the pressure differs from a predetermined minimum value, this is a measure of the fact that it is actually desired to deliver pressurized cleaning fluid. Subsequently, the first solenoid valve or the second solenoid valve can be energized and thereby pass into its open position. Thus, the pump can be supplied with cleaning fluid again, which can be pressurized by the pump and then discharged via the pressure line.
- a first signal transmitter and a second signal generator are arranged in the pressure line, wherein the first signal transmitter when exceeding a maximum value of the prevailing pressure in the pressure line and the second signal generator falls below a minimum value of in the Pressure line prevailing pressure of the control line provides a signal.
- the exceeding of the maximum value and the undershooting of the minimum value of the pressure of the cleaning liquid located in the pressure line is thus detected by two separate signal generators, which are each in electrical connection with the control device via a signal line.
- the controller may control the energization of the solenoid valves.
- At least one signal generator can be designed, for example, as a pressure switch, which provides the control device with a switching signal.
- Figure 1 a perspective view of a high-pressure cleaning device according to the invention.
- Figure 2 a schematic representation of the interaction of individual
- a simplified high-pressure cleaner 10 according to the invention is shown with a chassis 12, on the underside of two wheels 14, 15 and a steering roller 16 are rotatably mounted.
- a housing 17 On the upper side of the chassis 12, a housing 17 is positioned with two handle bars 19, 20 which can be grasped by the user for moving the high-pressure cleaning device 10.
- a motor pump unit 21 is arranged on the chassis 12.
- the motor pump unit 21 comprises an electric motor 23 and a pump 24. This is clear from FIG.
- the chassis 12 carries an electric heater 26.
- the heater 26 comprises a liquid storage 27 and an electric heater 28, which is arranged in the interior 29 of the liquid storage 27.
- a control device 30 of the high-pressure cleaning device 10 is arranged above the motor pump unit 21, a control device 30 of the high-pressure cleaning device 10 is arranged.
- the motor pump unit 21, the electric heater 26, and the controller 30 are covered by a hood not shown in the drawing to obtain a better overview.
- the high-pressure cleaning device 10 On its rear side 32, the high-pressure cleaning device 10 has a supply connection 34 and a pressure connection 35.
- a supply hose can be connected to the supply connection 34 so that the high-pressure cleaning device 10 can be supplied with cleaning fluid.
- a pressure hose 37 are connected, which has at its free end a device for dispensing pressurized cleaning fluid.
- a spray gun 38 is connected to the free end of the pressure hose 37.
- a not shown in the drawing outlet valve is integrated in a conventional manner, which can be opened and closed by means of a pivot lever 39 by the user.
- a spray lance 40 connects to the spray gun 38 via a rotary control 42 with a high-pressure nozzle 41, via which the pressurized cleaning fluid can be directed onto an object to be cleaned. With the aid of the rotary control, the flow rate and pressure of the effluent cleaning fluid can be regulated.
- the pivoting lever 39 the user has the option of releasing or blocking the delivery of pressurized cleaning fluid.
- the supply connection 34 is connected via an input line 43 to the inlet of a cooling jacket 44, which surrounds the electric motor 23 in the circumferential direction.
- An outlet of the cooling jacket 44 is in flow communication via a main conduit 46 with a manifold 48 arranged at the inlet 50 of the liquid reservoir 27.
- a first outlet 51 of the line branch 48 opens into the interior 29 of the liquid reservoir 27, so that it can be filled via the main line 46 with liquid to be heated.
- a second outlet 54 of the line branch 48 is connected via a first connecting line 55 to a first input 57 of a valve 58.
- a second input 59 of the fitting 58 is connected via a second connecting line 61 to the outlet 63 of the liquid reservoir 27 in flow communication.
- An outlet 65 of the fitting 58 is connected to a suction line 67 of the pump 24, so that it can be supplied via the first connecting line 55 with cold cleaning liquid and via the second connecting line 61 with heated cleaning liquid.
- the provided cleaning liquid is pressurized and supplied via a pressure line 68 to the pressure port 35.
- the fitting 58 has a first conduit 70 and a second conduit 71.
- the first line 70 connects the first input 57 to the output 65 and the second line 71 connects the second input 59 to the output 65.
- a first solenoid valve 73 is connected to the first line 70 and a second solenoid valve 74 is connected to the second line 71 connected.
- the first solenoid valve 73 is connected via a control line 76 to the control device 30 in electrical connection
- the second solenoid valve 74 is connected via a control line 77 to the control device 30 in electrical connection.
- a first signal transmitter in the form of a first pressure switch 81 and a second signal transmitter in the form of a second pressure switch 82 are arranged in the pressure line 68.
- the two pressure switches 81, 82 are electrically connected via a signal line 84 and a signal line 85 to the control device 30.
- the electric heater 28 is supplied via an electrical supply line 87 from a power supply unit 88 with electrical energy.
- the energy supply device 88 is connected via a control line 90 to the control device 30 in electrical connection and can be connected via a connecting cable 92 to a voltage source.
- the control device 30 has a main switch 94 for switching the high-pressure cleaning device 10 on and off.
- Control device 30, a selector switch 95 and a temperature controller 96 With the help of the selector switch 95, the user can specify whether he wants the delivery of cold cleaning liquid or the delivery of heated cleaning liquid.
- the selector switch 95 has for this purpose two switching positions. If the user desires the dispensing of heated cleaning liquid, then he can set by means of the temperature controller 96 of the controller 30, a target temperature. The actual temperature of the cleaning liquid located in the interior 29 is detected by means of a known per se and therefore not shown in the drawing temperature sensor, which is connected via a sensor line to the control device 30 in electrical connection. Depending on the difference between the actual temperature and the setpoint temperature, the control device 30 can regulate the energy supply of the electric heater 28 by means of the energy supply device 88.
- the supply of cleaning liquid to the suction line 67 of the pump 24 is selectively either via the first solenoid valve 73 or the second solenoid valve 74.
- Both solenoid valves are normally closed, that is, they only take their open position when they by means of the control device 30th be charged with electricity.
- the first solenoid valve 73 and in the second switching position of the selector switch 95 the second solenoid valve 74 is energized. The current is applied only when actually cleaning liquid is discharged through the high pressure nozzle 41.
- either the first solenoid valve 73 or the second solenoid valve 74 is energized after switching on the high-pressure cleaner 10, so that the corresponding solenoid valve 73 and 74 opens and the pump 24 is supplied with cleaning fluid.
- the electric motor 23 is activated by the control device 30, so that the pump 24 is put into operation.
- Cold or heated cleaning liquid is then pressurized by the pump 24 and supplied via the pressure line 68 and the pressure hose 37 of the spray gun 38.
- the outlet valve of the spray gun 38 is open, the pressurized cleaning fluid is then discharged via the high-pressure nozzle 41.
- the first solenoid valve 73 or the second solenoid valve 74 is energized, the current being dependent on the pressure prevailing in the pressure line 68 pressure of the cleaning liquid. This pressure is a measure of whether actually pressurized cleaning fluid is dispensed through the high pressure nozzle 41.
- the solenoid valves 73 and 74 are thus energized only when the user actually wants to direct pressurized cleaning fluid to an object. If this is not desired by the user, the current application of the solenoid valves 73, 74 is interrupted and these then automatically assume their closed position. The heating of the solenoid valves is thereby kept relatively low. This makes it possible to use inexpensive solenoid valves and also has the advantage that the high-pressure cleaning device 10 is not susceptible to interference.
Landscapes
- Cleaning By Liquid Or Steam (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2011/064679 WO2013026494A1 (de) | 2011-08-25 | 2011-08-25 | Hochdruckreinigungsgerät |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2747908A1 true EP2747908A1 (de) | 2014-07-02 |
EP2747908B1 EP2747908B1 (de) | 2015-10-28 |
Family
ID=44511012
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11748672.0A Active EP2747908B1 (de) | 2011-08-25 | 2011-08-25 | Hochdruckreinigungsgerät |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2747908B1 (de) |
DK (1) | DK2747908T3 (de) |
WO (1) | WO2013026494A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019133971A1 (de) * | 2019-12-11 | 2021-06-17 | Alfred Kärcher SE & Co. KG | Vorrichtung zum führen einer flexiblen leitung |
EP4115998A1 (de) * | 2021-07-05 | 2023-01-11 | Andreas Stihl AG & Co. KG | Hochdruckreinigungsgerät |
DE102022119592A1 (de) * | 2022-08-04 | 2024-02-15 | Alfred Kärcher SE & Co. KG | Motorpumpeneinheit für ein hochdruckreinigungsgerät |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3212518A (en) * | 1963-02-05 | 1965-10-19 | Padek Ted | Dairy cleaning apparatus |
US3236689A (en) * | 1964-06-15 | 1966-02-22 | Homestead Valve Mfg Co | Method of operating spray generator |
US3383044A (en) * | 1965-08-09 | 1968-05-14 | Britt Tech Corp | Hydraulically controlled pressure washer |
US3645420A (en) * | 1969-06-23 | 1972-02-29 | Joseph G Machado | High-pressure hot water cleaner |
DE10146289A1 (de) * | 2001-05-17 | 2002-11-21 | Juergen Weigel & Herbert Eberh | Verfahren zur Steuerung eines Hochdruckreinigungsgeräts |
-
2011
- 2011-08-25 WO PCT/EP2011/064679 patent/WO2013026494A1/de active Application Filing
- 2011-08-25 DK DK11748672.0T patent/DK2747908T3/da active
- 2011-08-25 EP EP11748672.0A patent/EP2747908B1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2013026494A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2013026494A1 (de) | 2013-02-28 |
EP2747908B1 (de) | 2015-10-28 |
DK2747908T3 (da) | 2016-02-01 |
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