EP3749466A1 - Verfahren zum steuern eines hochdruckreinigungsgeräts und hochdruckreinigungsgerät insbesondere zur durchführung des verfahrens - Google Patents
Verfahren zum steuern eines hochdruckreinigungsgeräts und hochdruckreinigungsgerät insbesondere zur durchführung des verfahrensInfo
- Publication number
- EP3749466A1 EP3749466A1 EP18704222.1A EP18704222A EP3749466A1 EP 3749466 A1 EP3749466 A1 EP 3749466A1 EP 18704222 A EP18704222 A EP 18704222A EP 3749466 A1 EP3749466 A1 EP 3749466A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electric motor
- control device
- pressure
- power consumption
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/06—Mobile combinations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
- B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
- B08B2203/0223—Electric motor pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
- B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
- B08B2203/027—Pump details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
- B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
- B08B2203/0282—Safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2203/00—Motor parameters
- F04B2203/02—Motor parameters of rotating electric motors
- F04B2203/0201—Current
Definitions
- the invention relates to a method for controlling a high-pressure cleaning device which has an electric motor, a high-pressure pump driven by the electric motor and a control device.
- the invention relates to a high-pressure cleaning device with an electric motor, a high-pressure pump driven by the electric motor and a control device, in particular for carrying out the method mentioned above.
- a cleaning liquid preferably water
- a cleaning liquid can be pressurized and directed to a surface to be cleaned.
- a liquid supply line for example a suction hose
- cleaning fluid can be supplied to a high-pressure pump of the high-pressure cleaning device.
- the cleaning fluid can be pressurized by the high-pressure pump and then discharged via a fluid delivery line, for example a pressure hose.
- the high-pressure cleaning device has an electrical control device. With the help of the control device, the electric motor can be switched on and off.
- pressure or flow sensors are usually used. With the aid of a pressure sensor, a sensor signal can be obtained which corresponds to the pressure of the cleaning fluid prevailing inside the high pressure pump.
- the electric motor can be switched off by the control device on the basis of the sensor signal of the pressure sensor.
- a sensor signal corresponding to the flow rate of the cleaning fluid can be obtained by means of a flow sensor. A drop in the flow rate may be indicative of incipient dry running, and to counteract this, the electric motor may be turned off based on the sensor signal provided by the flow sensor.
- thermo sensors with the help of which a temperature can be detected within the high-pressure pump, which is influenced by the cleaning fluid. If no cleaning liquid is supplied to the high-pressure pump, the temperature detected by the temperature sensor may change, and this change may be an indication of an incipient dry-running. On the basis of the sensor signal provided by the temperature sensor, an incipient dry run can be counteracted by switching off the electric motor.
- Pressure, flow and / or temperature sensors are often positioned inside the high pressure pump and require a not inconsiderable amount of space.
- the object of the present invention is therefore to provide a method for controlling a high-pressure cleaning device, which makes it possible in a simpler way to counteract the risk of dry running.
- This object is achieved according to the invention in a method of the type mentioned above in that the control device determines the actual value of the electric power consumption of the electric motor and the electric motor turns off when the actual value of the electrical power consumption after a predetermined start phase after switching on the electric - motors is smaller than a specified minimum value of the electrical power consumption of the electric motor.
- a predetermined start phase is understood to be a time interval which begins again each time the electric motor is switched on and has a predefined duration.
- the duration of the time interval and thus the duration of the starting phase can be, for example, at least one minute, in particular two minutes to three minutes.
- the control device of the high-pressure cleaning device determines the actual value of the electric power consumption of the electric motor. If the actual value at the end of the predetermined starting phase is smaller than a predefined minimum value of the electric power consumption of the electric motor, the electric motor is switched off by the control device, since falling below the minimum value of the electrical power consumption after the predetermined starting phase is an indication of a dry run represents. Within the starting phase, the electric motor, even with proper operation, that is, even with proper supply of cleaning fluid, not yet in all cases an electrical power consumption, which exceeds the predetermined minimum value.
- the high-pressure pump is however filled with cleaning fluid during proper operation, that is to say in particular when the cleaning fluid is supplied properly and the electric power consumption of the electric motor exceeds the predetermined minimum value.
- Electric motor is less than the value of the electric power consumption of the electric motor in proper operation.
- the minimum value of the electrical power consumption can be, for example, less than 350 W, in particular 250 to 350 W, for example 320 W.
- the power consumption of the electric motor can be, for example, at least 400 W.
- the electric power consumption of the electric motor after the start phase is greater than the predetermined minimum value, then there is a proper operation of the high-pressure cleaner, in particular, then the high-pressure cleaner is sufficiently supplied with cleaning liquid. If the electric power consumption of the electric motor after the start phase is less than the predetermined minimum value, then there is a fault that indicates that the high-pressure cleaner is not sufficiently supplied with cleaning fluid and thus there is a risk of dry running. In this case, the electric motor is switched off by the control device. The risk of dry running can thus be recognized on the basis of the electrical power consumption of the electric motor without it being absolutely necessary to integrate additional sensors into the high-pressure pump.
- control device detects the actual values of the supply current and the supply voltage of the electric motor and calculates the actual value of the electrical power consumption of the electric motor from these actual values.
- Electric motor is obtained by multiplying the actual value of the supply current and the actual value of the supply voltage of the electric motor.
- the electric motor To operate the electric motor, the electric motor must be supplied with electrical energy from an electrical energy source.
- the one from the energy source provided current represents the supply current of the electric motor, and the output voltage of the power source represents the supply voltage of the electric motor.
- the control device conveniently detects the actual value of the supply current and the actual value of the supply voltage and calculates therefrom the actual value of the electrical power consumption of the electric motor.
- the calculated actual value is compared by the control device with the predetermined minimum value of the electrical power consumption. If the calculated actual value of the electric power consumption of the electric motor after the predetermined starting phase has elapsed is smaller than the predetermined minimum value, then the control device switches off the electric motor.
- the detection of the actual value of the supply current also has the advantage that in a simple manner, for example, caused by a blockade of the motor shaft overload of the electric motor can be reliably detected. If the actual value of the supply current exceeds a predetermined maximum current value, then the control device switches off the electric motor in a favorable manner in order to counteract the risk of damage due to an overload.
- the high-pressure cleaning device has at least one rechargeable battery and the control device detects the battery current and the battery voltage and calculates therefrom the actual value of the electrical power consumption of the electric motor.
- the high-pressure cleaning device can be operated independently of an external energy source, in particular independently of a public supply network.
- the current that is supplied to the electric motor by the at least one battery forms the supply current of the electric motor, and the output voltage of the at least one battery forms the supply voltage of the electric motor.
- the battery current and the battery voltage are conveniently detected by the controller of the high-pressure cleaner, and by multiplying the battery current and the battery voltage of the controller of the actual value of the electric Power consumption of the electric motor calculated.
- This actual value is compared with the predetermined minimum value of the electric power consumption of the electric motor. If the calculated actual value is less than the predefined minimum value after the specified starting phase has elapsed, the control device switches off the electric motor since there is a risk of dry running.
- the control device switches off the electric motor when, after the start phase has elapsed, the comparison of the actual value of the power consumption of the electric motor with the predetermined minimum value of the power consumption reveals the risk of dry running.
- the control device switches off the electric motor, if the pressure prevailing in an outlet line of the high-pressure cleaning device of a cleaning fluid conveyed by the high-pressure cleaning device exceeds a predetermined switch-off value, and that the control device switches the electric motor back on, when the prevailing in the outlet pressure of the cleaning liquid drops again, in particular falls below a predetermined switch-on.
- Such an embodiment of the inventive method allows a user to control the electric motor by actuating a manually closable Ausbringorgans, which is arranged at the free end of a liquid discharge line, which is connected to the outlet line of the high-pressure cleaner.
- a pressure hose can be used as the liquid discharge line
- a spray gun for example, which is in fluid communication with the outlet line of the high-pressure cleaning device via the pressure hose, can be used as the manually closable dispensing element.
- the user can open the dispensing organ.
- an outlet pressure of the cleaning fluid then forms.
- the user may close the dispenser.
- the pressure of the cleaning liquid in the outlet line increases, so that it has a predetermined exceeded switch-off value.
- This overshoot may be detected by a pressure sensing element, such as a pressure switch, and a corresponding control signal from the pressure sensing element may cause the controller to turn off the electric motor.
- a pressure sensing element such as a pressure switch
- a corresponding control signal from the pressure sensing element may cause the controller to turn off the electric motor.
- the pressure of the cleaning liquid in the outlet line drops, preferably falling below a predetermined switch-on value, and a corresponding control signal from the pressure-sensing member can then cause the control unit to switch the electric motor back on.
- the control of the electric motor by manual operation of a Ausbringorgans facilitates the operation of the high-pressure cleaner. If this also has at least one rechargeable battery, the operation of the high-pressure cleaning device is additionally simplified since the high-pressure cleaning device can also be operated when no external energy source is available for the electric motor.
- the electric motor can be controlled by opening and closing a Ausbringorgans, however, the user can after mistraying the Ausbringorgans come to the mistaken view, a final operation of a main switch, in which the main switch in an off position is moved, let the termination of
- Operation of the high-pressure cleaning device is not necessary since the electric motor has already been switched off by the control device.
- This erroneous view can lead to the user ending the supply of cleaning fluid to the high-pressure cleaning device, for example by separating a fluid supply line from the high-pressure cleaning device and subsequently depositing it in a storage space.
- the control device is still in a monitoring state and reacts to a possible pressure drop in the outlet line, as long as the main switch is still in its closed position. If, for example, there is a pressure drop in the outlet line of the high-pressure cleaning device, for example because of a leakage of the dispensing element, then the electric motor can be protected due to the use of the battery.
- control device determines the actual value of the electrical power consumption continuously or periodically.
- control device periodically determines the actual value of the electric power consumption of the electric motor after switching on the electric motor at short intervals, in particular at intervals of a maximum of 1 minute, for example at intervals of a maximum of 10 seconds, and the electric motor is switched off after the start phase has elapsed. switches, provided that the actual value of the electric power consumption of the electric motor is smaller than the predetermined minimum value of the electric power consumption of the electric motor.
- the actual value of the electrical power consumption of the electric motor is continuously or periodically compared with the predetermined minimum value of the electrical power consumption and after the start phase of the electric motor is turned off, if it results from the comparison, that the actual value the electrical power consumption is less than the minimum value.
- the periodic comparison of the actual value of the electrical power consumption of the electric motor with the minimum value of the electrical power consumption of the motor can be carried out, for example, at intervals of not more than one minute, for example at intervals of a maximum of 10 seconds. It is of particular advantage if the reconnection of the electric motor after it has been switched off after the start phase due to a shortfall of the minimum value of electric power consumption of the electric motor of the control device, only by manual operation of an actuating element of the high-pressure cleaner is possible , As already explained, the electric motor is switched off by the control device if the actual value of the electric power consumption of the electric motor after the start phase has elapsed is smaller than the predetermined minimum value.
- the user In order to be able to continue the operation of the high-pressure cleaning device, the user must conveniently manually actuate an actuating element of the high-pressure cleaning device, for example the main switch of the high-pressure cleaning device, an automatic switching on of the electric motor is thus not possible.
- an actuating element of the high-pressure cleaning device for example the main switch of the high-pressure cleaning device
- an automatic switching on of the electric motor is thus not possible.
- the main switch must be moved from its closed position to its off position and then back to the closed position to continue the operation of the high-pressure cleaner, after the electric motor of the controller due to a taking place after the start phase undershooting of the minimum value the power consumption has been switched off.
- the invention also relates to a high-pressure cleaning device with an electric motor, a high-pressure pump driven by the electric motor and a control device, in particular for carrying out the method explained above.
- the control device is set up to determine the actual value of the electric power consumption of the electric motor and with a predetermined minimum value of the electric power consumption of the electric motor Electric motor to be compared, and that the electric motor can be switched off by the control device, if the actual value of the electric power consumption of the electric motor after a predetermined start phase after switching on the electric motor is smaller than the minimum value of the electric power consumption of the electric motor.
- the high-pressure cleaning device makes it possible to counteract the risk of dry running without having to position sensors within the high-pressure pump for this purpose.
- the risk of dry running is detected by evaluating the electrical power consumption of the electric motor.
- the control device preferably has a current detection element for detecting the actual value of the supply current of the electric motor and a voltage detection element for detecting the actual value of the supply voltage of the electric motor, and the control device is set up, from the actual values of the supply current and the supply voltage, the actual value of the electrical power consumption to calculate the electric motor.
- the current provided by a power source to the electric motor represents the supply current of the electric motor
- the output voltage of the energy source represents the supply voltage of the electric motor.
- the control device is advantageously designed such that it consists of the actual values of the supply current and the supply voltage calculates the actual value of the electric power consumption of the electric motor.
- the control device can have a signal processing element, in particular a multiplication element.
- the electric motor can be switched off by the control device, provided that the actual value of the supply current exceeds a predetermined maximum permissible current value.
- Exceeding the maximum permissible current value of the supply current is an indication of an overload of the electric motor. This overload can be caused for example by a blockade of the motor shaft. If there is an overload, this is detected by the control device because the actual value of the supply current exceeds the predetermined maximum permissible current value.
- the controller can then turn off the electric motor.
- the control device preferably has a memory element for storing the predetermined minimum value of the electrical power consumption of the electric motor. The minimum value can be stored for example in the production of the control device in the memory element.
- a maximum permissible current value of the supply current of the electric motor can also be stored in the memory element.
- the high-pressure cleaning device has at least one rechargeable battery for the power supply of the electric motor.
- the use of the rechargeable battery makes it possible to operate the high-pressure cleaning device even when no external energy source, in particular no public supply network, is available.
- the latter has an outlet line and the electric motor can be switched off by the control device if the pressure of the cleaning fluid prevailing in the outlet line exceeds a predetermined switch-off value, and the electric motor can be switched back on by the control device.
- the pressure prevailing in the outlet line of the cleaning liquid drops again, in particular falls below a predetermined switch-on.
- the user can control the electric motor by operating a delivery member connected to the high-pressure cleaner via a liquid discharge line. If the dispensing organ is closed by the user, the pressure of the cleaning liquid rises in the outlet line, so that a predetermined switch-off value is exceeded.
- a corresponding control signal can then cause the control device to extinguish the electric motor. turn. If the dispensing member is reopened by the user, the pressure of the cleaning liquid in the outlet line falls below a preset switch-on value and a corresponding control signal can cause the control device to switch the electric motor back on.
- the high-pressure cleaning device has a signal transmitter which is signal-conducting connected to the control device and which provides the control device with a control signal which depends on the pressure of the cleaning fluid prevailing in the outlet line.
- the signal generator is preferably designed as a pressure switch.
- control device is set up to periodically determine the actual value of the electrical power consumption and to compare it with the predetermined minimum value of the electric power consumption of the electric motor.
- control device is set up to periodically determine the actual value of the electrical power consumption of the electric motor after switching on the electric motor at short time intervals, in particular at intervals of not more than 1 minute, for example at intervals of a maximum of 10 seconds, and to switch off the electric motor after the start phase, if the actual value of the electric power consumption of the electric motor is smaller than the predetermined minimum value of the electric power consumption of the electric motor.
- the actual value of the electric power consumption of the electric motor from the control device is continuously or periodically comparable to the predetermined minimum value of the electrical power consumption and after the start phase of the electric motor is switched off, if by comparison shows that the actual value of the electrical power consumption is smaller than the minimum value.
- the periodic comparison of the actual value of the electric power consumption of the electric motor with the minimum value of the electrical power consumption of the motor is preferably carried out at intervals of not more than one minute, for example at intervals of a maximum of 10 seconds.
- the high-pressure cleaning device according to the invention has an actuating element and after the start phase due to a shortfall of the minimum value of the electrical power consumption of the control device off electric motor can only be re-engaged by manual actuation of the actuator.
- the actuator is conveniently designed as a main switch.
- the high-pressure pump of the high-pressure cleaning device is preferably designed as a reciprocating pump.
- the reciprocating pump has a plurality of pistons, each immersed in a pump space and are linearly displaceable relative to their longitudinal axis back and forth.
- Such reciprocating pumps are known in the art and require no further explanation in the present case.
- the cleaning fluid can be placed under a high pressure.
- the pressure of the cleaning liquid is preferably at least 70 bar, in particular the pressure of the cleaning liquid can amount to at least 100 bar, at least for a short time.
- the electric motor of the high-pressure cleaning device according to the invention is conveniently coupled via a transmission to the high-pressure pump.
- a planetary gear has proven to be advantageous.
- the electric motor of the high-pressure cleaning device according to the invention preferably has a fixed speed.
- the speed of the electric motor is in an advantageous embodiment of the invention at least 15,000 revolutions per minute, in particular 15,000 to 18,000 revolutions per minute.
- FIG. 1 shows a perspective view of a preferred embodiment of a high-pressure cleaning device according to the invention
- FIG. 2 shows a schematic block diagram of a control device of the high-pressure cleaning device from FIG. 1.
- the high-pressure cleaning device 10 has a housing 12 in which a motor pump unit 14 with an electric motor 16 and a driven by the electric motor 16 via a gear 18 high-pressure pump 20 is arranged.
- the electric motor 16 is operated at a constant speed which is at least 15,000 rpm, in particular 15,000 to 18,000 rpm, for example 16,500 rpm.
- the high-pressure pump 20 has a pump inlet 22 and a pump outlet 24.
- the high-pressure pump 20 is designed as a reciprocating piston pump and has a plurality of pistons 21, 23, 25, which are driven by the electric motor 16 via the gear 18 to a reciprocating movement along their respective longitudinal axis and here in a conventional manner each in a pumping space immerse, the volume of which is periodically increased and decreased by the reciprocating motion of the respective piston and thereby to promote cleaning liquid.
- a liquid supply line (not shown in the drawing), for example a suction hose, can be connected to the pump inlet 22.
- a liquid discharge line for example, a pressure hose can be connected.
- the pressure hose can carry at its free end a user manually closable dispensing member for the cleaning fluid, such as a spray gun.
- the pump inlet 22 forms the free end of an outlet line 26 of the high-pressure cleaning device 10.
- the outlet line 26 is assigned a signal generator which, in the illustrated embodiment, is designed as a pressure switch 28 and dependent on the pressure of the cleaning fluid prevailing in the outlet line 26 Control signal provides. This will be discussed in more detail below.
- a control device 30 and a rechargeable battery 32 are arranged in the housing 12.
- the rechargeable battery 32 represents an energy source for the electric motor 16, and by means of the control device 30, the electric motor 16 can be switched on and off.
- a schematic block diagram of the control device 30 is shown in FIG.
- the control device 30 is in signal-conducting connection via a signal line 34 to the pressure switch 28. This allows the control device 30 to switch the electric motor 16 on and off as a function of the pressure of the cleaning fluid prevailing in the outlet line 26. If the dispensing element arranged at the free end of the pressure hose is closed by the user, the pressure of the cleaning fluid rises in the area of the outlet line 26. If the pressure exceeds a predetermined switch-off value, then a control signal is transmitted from the pressure switch 28 to the control device 30, which is thereby caused to switch off the electric motor 16. If the dispensing member is opened again by the user, the pressure of the cleaning fluid falls in the Outlet line 26 from. If the pressure falls below a predetermined switch-on value, the pressure switch 28 sends a control Signal transmitted to the control device 30, which causes the control line 30 to turn on the electric motor 16 again.
- control device 30 Via a connecting line 36, the control device 30 is connected to a display device 38 of the high-pressure cleaning device 10. At least one operating value of the high-pressure cleaning device 10, in particular the state of charge of the battery 32, is displayed on the display device 38.
- the state of charge of the battery 32 is monitored by the control device 30.
- the control device 30 has a current detection element 40 and a voltage detection element 42.
- the battery current provided by the battery 32 that is to say the supply current of the electric motor 16 is periodically detected, and by means of the voltage detection element 42 the output voltage of the battery 32, that is to say the supply voltage of the electric motor 16, becomes periodic detected.
- the periodic detection of the battery current and the battery voltage can take place, for example, at intervals of 10 seconds.
- the actual value of the battery current is transmitted from the current detecting section 40 to a signal processing section 44, and the actual value of the battery voltage is transmitted from the voltage detecting section 42 to the signal processing section 44.
- the actual value of the battery voltage is multiplied by the signal processing member 44 with the actual value of the battery current.
- the multiplication gives the actual value of the electric power consumption of the electric motor 16, and this calculated actual value is from a comparison element 46 of the control device 30 with a predetermined minimum value of the electric
- the minimum value is stored in a memory element 48 of the control device 30.
- control device 30 can detect whether the actual value of the electrical power consumption of the electric motor 16 is smaller than the predetermined minimum value of the electrical power consumption.
- control device 30 has a timer 50 which determines the sequence of a start phase which is restarted each time the electric motor 16 is switched on.
- the duration of the starting phase can be, for example, 2 or 3 minutes.
- the control device 30 For switching on and off of the electric motor 16, the control device 30 has an electrically controllable switching element 52. If the actual value of the electrical power consumption of the electric motor 16 calculated by the signal processing element 44 is less than the predetermined minimum value of the electrical power consumption of the electric motor 16 stored in the memory element 48 after the end of the predetermined starting phase, then the switching element 52 switches off the electric motor 16, thereby reducing the risk to counteract dry running of the high-pressure pump 20.
- the background for the shutdown of the electric motor 16 falls below the predetermined minimum value of the electrical power consumption after the start phase is the fact that the electric motor 16 receives only a small power when the high-pressure pump 20 is not sufficiently supplied with cleaning liquid.
- the user can transfer an actuating member in the form of a main switch 54 into a closed position.
- the electric motor 16 is then turned on by the control device 30 by means of the switching element 52 and simultaneously the timer 50 is started, which measures the time from the switching on of the electric motor 16 and is reset to zero with each turning off of the electric motor 16.
- Via the pump inlet 22 and a liquid supply line connected thereto can then be sucked 20 from the high-pressure pump cleaning liquid, for example, from a reservoir.
- the high-pressure pump 20 is filled with cleaning fluid and the electric power consumption of the electric motor 16 increases.
- the electrical power consumption is periodically from the signal processing member 44 from the calculated by the current detection element 40 actual value of the battery current and the battery voltage provided by the voltage detection element 42 calculated. From the comparison element 46, a control signal is provided which is dependent on the comparison of the actual value of the electrical power consumption of the electric motor 16 with the predetermined minimum value of the electric power consumption of the electric motor 16.
- the sequence of a start phase which may last for example 2 or 3 minutes after the electric motor 16 is switched on, is signaled by the timer 50.
- the switching element 52 switches off the electric motor 16, if the actual value of the electrical power consumption is smaller than the predetermined minimum value, because falling below the minimum value of the electrical power consumption is an indication that there is no sufficient supply of cleaning liquid and there is a risk of dry running. If there is no drop below the minimum value of the power consumption, the electric motor 16 continues to be supplied with energy and the actual value of the electrical power consumption is periodically compared with the minimum value of the electric power consumption of the electric motor 16.
- the electric motor 16 If, after the start phase has elapsed, the electric motor 16 has been switched off by the control unit 30 due to a drop below the minimum value of the electrical power consumption, then it can only be switched on again by the user switching the main switch 54 into its off position and then back into it Switched on switching position. However, if the electric motor 16 has been switched off by closing the dispensing member arranged at the free end of the pressure hose, then it can be switched on again at any time by reopening the dispensing member without additionally having to actuate the main switch 54.
- the control device 30 thus monitors the power consumption of the electric motor 16 and switches it off when the power consumption at the end of the starting phase is less than the predetermined minimum value of the power consumption. Damage to the high pressure pump 20 due to an insufficient supply of cleaning fluid can be avoided.
- the controller 30 also monitors the supply current of the electric motor 16, that is, the battery current. If the battery current exceeds a predetermined maximum current value stored in the memory element 48, this is likewise recognized by the comparison element 46, which then causes the switching element 52 to switch off the electric motor 16, since there is an overload and there is the risk that the electric motor 16 is damaged.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2018/053095 WO2019154494A1 (de) | 2018-02-07 | 2018-02-07 | Verfahren zum steuern eines hochdruckreinigungsgeräts und hochdruckreinigungsgerät insbesondere zur durchführung des verfahrens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3749466A1 true EP3749466A1 (de) | 2020-12-16 |
| EP3749466B1 EP3749466B1 (de) | 2023-07-26 |
Family
ID=61189456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18704222.1A Active EP3749466B1 (de) | 2018-02-07 | 2018-02-07 | Verfahren zum steuern eines hochdruckreinigungsgeräts und hochdruckreinigungsgerät insbesondere zur durchführung des verfahrens |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3749466B1 (de) |
| CN (1) | CN111699052B (de) |
| WO (1) | WO2019154494A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4356006A1 (de) | 2021-06-16 | 2024-04-24 | Techtronic Cordless GP | Tragbare pumpe mit teleskopischen rohren |
| EP4452530A1 (de) * | 2021-12-21 | 2024-10-30 | Alfred Kärcher SE & Co. KG | Elektrisch betriebenes hochdruckreinigungsgerät |
| DE102023101716A1 (de) | 2023-01-24 | 2024-07-25 | Alfred Kärcher SE & Co. KG | Verfahren zum steuern eines reinigungsgeräts und reinigungsgerät insbesondere zur durchführung des verfahrens |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9013486U1 (de) * | 1990-09-25 | 1990-11-29 | Alfred Kärcher GmbH & Co, 7057 Winnenden | Hochdruckreinigungsgerät |
| US7841351B1 (en) * | 2005-04-11 | 2010-11-30 | Goodway Technologies Corporation | Coil cleaning machine |
| WO2007045259A1 (de) * | 2005-10-19 | 2007-04-26 | Alfred Kärcher Gmbh & Co. Kg | Hochdruckreinigungsgerät |
| DE102009035276A1 (de) * | 2009-07-29 | 2011-02-10 | Spinflow Gmbh | Steuerung und Steuerungsverfahren für elektrische Wasserpumpen |
| KR101173050B1 (ko) * | 2009-12-04 | 2012-08-13 | 기아자동차주식회사 | 전동식 오일펌프의 구동 제어 장치 및 방법 |
| CN102493951A (zh) * | 2011-12-06 | 2012-06-13 | 安徽泰格电气科技股份有限公司 | 水泵智能控制监控系统 |
| JP2013169486A (ja) * | 2012-02-17 | 2013-09-02 | Hitachi Koki Co Ltd | 高圧洗浄装置 |
| CN104033369A (zh) * | 2014-06-06 | 2014-09-10 | 芜湖爱瑞特环保科技有限公司 | 一种电动高压水泵无级调速控制系统 |
| CN107051939B (zh) * | 2016-11-22 | 2019-12-24 | 常州格力博有限公司 | 自反馈式清洗机及其控制方式 |
| CN106990723A (zh) * | 2017-03-13 | 2017-07-28 | 浙江亚特电器有限公司 | 一种高压清洗机及其无水检测方法 |
-
2018
- 2018-02-07 EP EP18704222.1A patent/EP3749466B1/de active Active
- 2018-02-07 CN CN201880088802.9A patent/CN111699052B/zh active Active
- 2018-02-07 WO PCT/EP2018/053095 patent/WO2019154494A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CN111699052A (zh) | 2020-09-22 |
| CN111699052B (zh) | 2023-04-07 |
| WO2019154494A1 (de) | 2019-08-15 |
| EP3749466B1 (de) | 2023-07-26 |
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