EP3762156A1 - Steuerverfahren für ein hochdruckreinigungsgerät und hochdruckreinigungsgerät insbesondere zur durchführung des verfahrens - Google Patents
Steuerverfahren für ein hochdruckreinigungsgerät und hochdruckreinigungsgerät insbesondere zur durchführung des verfahrensInfo
- Publication number
- EP3762156A1 EP3762156A1 EP18711072.1A EP18711072A EP3762156A1 EP 3762156 A1 EP3762156 A1 EP 3762156A1 EP 18711072 A EP18711072 A EP 18711072A EP 3762156 A1 EP3762156 A1 EP 3762156A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electric motor
- control device
- operating mode
- power consumption
- speed
- 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
- F04B49/06—Control using electricity
-
- 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
- F04B49/20—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 by changing the driving speed
-
- 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
- B08B2203/0282—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 control method for a high-pressure cleaning device, comprising a pump for conveying a cleaning liquid, an electric motor for driving the pump, a control device for controlling the electric motor and a first connection element for connecting a supply line for pressurized cleaning liquid and a second connecting element for connecting an outlet line, which carries at its free end a dispensing member with a nozzle for discharging the pressurized cleaning liquid.
- the invention relates to a high-pressure cleaning device, a pump for conveying a cleaning liquid, an electric motor for driving the pump, a control device for controlling the electric motor and a first connection element for connecting a supply line for pressurized cleaning liquid and a second connection element for connecting an outlet line which carries at its free end a nozzle for discharging the pressurized cleaning liquid, in particular for carrying out the above-mentioned control method.
- a cleaning liquid preferably water
- a supply line for example a suction hose
- the cleaning fluid may be pressurized by the pump and then discharged via an outlet conduit carrying at its free end a dispensing member having a nozzle for dispensing the pressurized cleaning fluid.
- the high-pressure cleaning 2 supply device to an electrical control device, which turns on and off the electric motor and controls the speed of the electric motor.
- nozzles For dispensing pressurized cleaning liquid, different nozzles can be used, which differ in particular in the size of their outlet opening, over which the cleaning liquid is dispensed.
- a cleaning liquid jet can be generated, which can be directed to the object to be cleaned.
- nozzles which have a relatively small outlet opening a very intensive cleaning liquid jet can be generated, which is particularly suitable for the cleaning of rather insensitive objects, whereas with the aid of nozzles having a relatively large outlet opening, a cleaning liquid jet can be generated, which is particularly suitable for the cleaning of delicate objects.
- the electric power consumption of the electric motor is dependent on the size of the outlet opening of the nozzle used. For nozzles with a smaller outlet opening, the electrical power consumption of the electric motor is greater than for nozzles with a larger outlet opening. When changing the nozzle thus changes the electric power consumption of the electric motor.
- Object of the present invention is to develop a control method and a high-pressure cleaner of the type mentioned in such a way that the speed of the electric motor is easily adjustable when changing the nozzle connected to da high pressure cleaning device.
- control device has a plurality of operating modes in which it controls the electric motor with different speeds, and in that the control device monitors the electrical power consumption of the electric motor, wherein the Control device at an exceeding a predetermined tolerance range exceeding the power consumption of the electric motor of the currently available operating mode 3 switches into the operating mode with the next higher rotational speed of the electric motor, if the current operating mode is not already the operating mode with the highest rotational speed of the electric motor, and wherein the control device at a predetermined tolerance range exceeding reduction in power consumption of the electric motor from the present invention ing operating mode in the operating mode with the next lower speed of the electric motor switches, if the current operating mode is not already the operating mode with the lowest speed of the electric motor.
- the control device has a plurality of operating modes in which it controls the electric motor at respectively different rotational speeds, and the control device monitors the electric power consumption of the electric motor and changes its operating mode as a function of a change in the electrical power consumption.
- control device If the control device detects an increase in the power consumption of the electric motor exceeding a predetermined tolerance range, it switches from the currently available operating mode into the operating mode with the next higher rotational speed of the electric motor, unless it is already in the operating mode with the highest rotational speed of the electric motor. If the latter is the case, the control device maintains the operating mode with the highest rotational speed of the electric motor at a power consumption increase exceeding a predetermined tolerance range.
- control device If the control device detects a reduction of the power consumption of the electric motor exceeding a predetermined tolerance range, it switches from the currently available operating mode to the operating mode with the next lower rotational speed of the electric motor, unless it is already in the operating mode with the lowest rotational speed of the electric motor , If the latter is the case, it retains the operating mode with the lowest speed of the electric motor at a reduction of the power consumption of the electric motor exceeding a predetermined tolerance range. 4
- the electrical control device monitors the electric power consumption of the electric motor and therefore recognizes the change to a nozzle with a smaller outlet opening on the basis of the increase in power consumption. This has the consequence that the control device switches from the current operating mode to the operating mode with the next higher rotational speed of the electric motor, so that the electric motor is operated at a higher rotational speed after such a nozzle change.
- the control device retains this operating mode even after the power consumption has been increased.
- a first nozzle is replaced by a second nozzle which has a larger outlet opening than the first nozzle, this leads to a reduction in the electrical power consumption of the electric motor.
- the electric control device monitors the electrical power consumption of the electric motor, it recognizes the change to a nozzle with a larger outlet opening on the basis of the reduction in power consumption. As a result, the control device switches over from the current operating mode to the operating mode with the next lower rotational speed of the electric motor, so that the electric motor is operated at a lower rotational speed after such a nozzle change.
- the control device retains - 5 - this mode of operation even after the power consumption has been reduced.
- the electric power consumption of the electric motor can be, for example, 800 watts or 1,000 watts at the lowest rotational speed, and the specified tolerance range of irrelevant changes in the electrical power consumption can be, for example, 10 watts.
- Changes in the electrical power consumption of, for example, more than 10 watts are based on a nozzle change and lead to a change in the operating mode of the control device, if the control device with an increase in electrical power consumption not already in the operating mode with the highest speed of the electric motor and a Verringe - The power consumption is not already in the operating mode with the lowest speed of the electric motor. Changes in the power consumption up to a maximum of, for example, 10 watts are ignored by the control device.
- the control device By monitoring the electric power consumption of the electric motor, the control device detects a nozzle change and can perform a change in the rotational speed of the electric motor.
- the setting of the speed is thus very easy. This facilitates the user's handling of the high-pressure cleaning device.
- control device has a plurality of operating modes, for example three, four or five operating modes which differ in the rotational speed of the electric motor, so that successive nozzle changes with increasingly larger or smaller discharge ports, the operating modes successively can be traversed depending on whether the electric power consumption of the electric motor increases or decreases beyond a predetermined tolerance range.
- the control device has two operating modes, wherein it controls the electric motor in the first operating mode with a first speed and in the second operating mode with a second speed, wherein the second speed is higher than the first speed.
- the control device switches over from the first operating mode at an exceeding the predetermined tolerance range increase in electrical power consumption of the electric motor in the second operating mode, and starting from the second operating mode, the control device switches at a predetermined tolerance range exceeding reduction the electrical power consumption of the electric motor in the first operating mode to.
- the electric motor In the first operating mode, the electric motor is operated at the lower first speed, and in the second operating mode, the electric motor is operated at the larger second speed.
- the first speed can be, for example, 16,000 revolutions per minute
- the second speed can be, for example, 18,000 revolutions per minute.
- control device If the control device is in the first operating mode and detects an increase in the electric power consumption of the electric motor which exceeds the predetermined tolerance range, then the control device switches to the second operating mode and controls the electric motor with the second rotational speed. However, if the control device recognizes a reduction of the electric power consumption of the electric motor exceeding the predetermined tolerance range in the first operating mode, it retains the first operating mode. If the control device is in the second operating mode and if it recognizes an increase in the electrical power consumption of the electric motor exceeding the predetermined tolerance range, it retains the second operating mode. If, in the second operating mode, the control device detects a reduction in the electric power consumption of the electric motor exceeding the predetermined tolerance range, it switches to the first operating mode and controls the electric motor at the first rotational speed. 7
- the control device detects the actual value of the supply current and the actual value of 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.
- the actual value of the electric power consumption of the electric motor results from multiplying the actual value of the supply current and the actual value of the supply voltage of the electric motor. To operate the electric motor, this is supplied by an electrical energy source with electrical energy.
- the current provided by the energy source represents the supply current of the electric motor, and the output voltage of the energy 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 calculates therefrom the actual value of the electric current Power consumption of the electric motor.
- the actual value can be periodically re-determined by the control device and monitored for changes in order to change the operating mode if necessary, as has already been explained above.
- the control device stores the actual value of the power consumption after the start as the reference value and after each change in the power consumption of the electric motor exceeding the tolerance range the changed actual value of the electrical power consumption of the electric motor stores as a reference value and in the subsequent operation of the electric motor periodically re-determines the actual value of the power consumption and compares it with the last stored reference value.
- the change in the power consumption of the electric motor exceeding the tolerance range is stored as a new reference value after each start and after each change in the power consumption of the electric motor after the start or after the change and in the subsequent operation the actual value of the electrical power output - Periodically determined and compared with the last stored reference value. Every start of the electric motor and every change of the power 8 acceptance, which exceeds the specified tolerance range, thus results in an update of the reference value.
- the control device controls the electric motor when starting with a starting speed that is identical to the speed that was present when the previous switching off the electric motor, or is fixed.
- the control device gives the electric motor a starting rotational speed. This may be the speed that was present when the electric motor was switched off before. Alternatively, it may be at the starting speed to a manufacturer in particular fixed predetermined speed.
- the control device stores the last available rotational speed of the electric motor in a volatile memory element and, in the event of a subsequent restart of the electric motor, uses the rotational speed last stored in the memory element as the starting rotational speed, unless the memory element has been erased is, and otherwise uses the fixed default start speed.
- Such an embodiment of the control method according to the invention has the advantage that, after a brief interruption in operation, the last available rotational speed of the electric motor is used as the new starting rotational speed, whereas in the case of a long-lasting interruption in operation of the electric motor, the starting rotational speed specified in particular by the manufacturer is used.
- the fixed predetermined starting speed is preferably the smallest speed of the electric motor.
- the start of the electric motor takes place in the operating mode with the lowest speed of the electric motor.
- the lowest speed can be, for example, 16,000 revolutions per minute.
- the control device switches off the electric motor if the pump outlet pressure of the cleaning fluid has a 9 exceeds the given switch-off value, and when the control device switches the electric motor back on when the pump outlet pressure of the cleaning fluid drops again, in particular falls below a predetermined switch-on value.
- the user has the option of switching off the electric motor by closing the dispensing element, for example a spray gun, arranged at the free end of the outlet line.
- the pump outlet pressure of the cleaning fluid increases, so that a predetermined switch-off value is exceeded.
- a corresponding control signal can then cause the control device to switch off the electric motor, the control device preferably storing the currently present rotational speed of the electric motor in a volatile memory element when it is switched off.
- the pump outlet pressure drops and falls below a predetermined switch-on value.
- the control device preferably instead uses the starting speed, which is fixed in particular by the manufacturer.
- the invention also relates to a high-pressure cleaning device comprising a pump for conveying a cleaning liquid, an electric motor for driving the pump, a control device for controlling the electric motor and a first connection element for connecting a supply line for under pressure setting cleaning liquid and a second connection element for connecting an outlet conduit having at its free end a dispensing member with a nozzle for discharging the pressurized cleaning liquid.
- the control device has a plurality of operating modes in which it drives the electric motor at different speeds controls, and that the control device monitors the electrical power consumption of the electric motor, wherein the control device is arranged at a ner ⁇ a predetermined tolerance range exceeding exceeding the power consumption of the electric motor from the present operating mode in the operating mode with the next higher speed of the electric motor if the current operating mode is not already the operating mode with the highest rotational speed of the electric motor, and wherein the control device is set up, with a tolerance range exceeding a predetermined tolerance range n Switching the power consumption of the electric motor from the present operating mode to the operating mode with the next lower speed of the electric motor, if the current operating mode is not already the operating mode with the lowest speed of the electric motor.
- the speed of the electric motor can be adjusted in a simple manner by such a configuration of the high-pressure cleaning device.
- the control device has a plurality of operating modes in which it controls the electric motor at respectively different speeds, and the control device monitors the electric power consumption of the electric motor. A nozzle change is detected by the control device on the basis of a change in the electric power consumption of the electric motor exceeding a predetermined tolerance range.
- the control device switches from the currently available operating mode to the operating mode with the next higher rotational speed of the electric motor, unless they are already in the operating mode with the highest rotational speed of the electric motor, and with a reduction in the power consumption of the electric motor, the predetermined tolerance range 11 exceeds the current operating mode in the operating mode with the next lower speed of the electric motor, unless it is already in the operating mode with the lowest speed of the electric motor.
- the control device has two operating modes, wherein it is set up to control the electric motor in the first operating mode at a first rotational speed and in the second operating mode at a second rotational speed, the second rotational speed being higher is considered the first speed.
- the control device is set up to switch from the first operating mode at an exceeding the predetermined tolerance range increase in electric power consumption of the electric motor in the second operating mode, and the Steuereinrich- device is set, starting from the second operating mode at a predetermined tolerance range exceeding reduction of the electric power consumption of the electric motor in the first operating mode switch.
- the electric motor in such an embodiment of the high-pressure cleaning device according to the invention is operated either with the smaller first rotational speed or with the larger second rotational speed.
- the control device has a first operating mode and a second operating mode. If the control device is in the first operating mode and recognizes an increase in the power consumption of the electric motor exceeding a predetermined tolerance range, it switches to the second operating mode in which the electric motor is operated at the higher second speed. If the control device is in the second operating mode and detects a reduction in the electric power consumption of the electric motor that exceeds the specified tolerance range, it switches to the first operating mode so that the electric motor subsequently operates at the lower first rotational speed becomes. Changes in the electrical power consumption of the 12
- Electric motors that do not exceed the specified tolerance range are disregarded by the controller.
- the control device 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 is set up from the actual values of the supply current and the supply voltage the actual value of calculate electrical power consumption of the electric motor.
- the current provided by an energy 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, which can then be monitored for changes, if necessary to change the operating mode of the control device and thus the speed of the electric motor.
- control device preferably has a signal processing element, in particular a multiplication element.
- control device has a first memory element for storing a reference value of the power consumption of the electric motor, and the control device has a comparison element for comparing the reference value with the currently determined actual value of the electrical power consumption of the electric motor.
- control device is configured to store the actual value of the power consumption that occurs after the start of the electric motor as a reference value after each start of the electric motor, and after each of these, the tolerance range 13 exceeding change in the power consumption of the electric motor to save the changed actual value of the electric power consumption of the electric motor as a reference value and to periodically re-determine the actual value of the power consumption in the subsequent operation of the electric motor and to compare with the last stored reference value.
- the change in the power consumption of the electric motor exceeding the tolerance range can be stored as a new reference value after each start and after each change in the power consumption of the electric motor present after the start or after the change the electrical power consumption periodically redetermined and compared with the last stored reference value.
- control device has a volatile memory element for storing the current rotational speed of the electric motor.
- control device is set up to store the rotational speed of the electric motor in the volatile memory element before the electric motor is switched off.
- the stored speed can be used when starting the electric motor after a brief interruption of service as the starting speed.
- control device has a non-volatile memory element for storing a fixed starting rotational speed of the electric motor.
- the fixed predetermined starting speed can be stored for example in the factory of the high-pressure cleaner in the non-volatile memory element.
- the electric motor can be switched off by the control device if the pump outlet pressure of the cleaning fluid has a 14 exceeds the given switch-off value, and the electric motor can be switched on again by the control device when the pump outlet pressure of the cleaning fluid drops again, in particular falls below a predetermined switch-on value.
- the user can switch off the electric motor by closing the delivery element arranged at the free end of the outlet line, which has the nozzle for discharging the pressurized cleaning liquid. As a result, the pump outlet pressure rises, so that a predetermined switch-off value is exceeded.
- a corresponding control signal can cause the control device to switch off the electric motor, wherein it stores the current rotational speed of the electric motor in the volatile memory element. If the dispensing member is reopened by the user, the pump outlet pressure of the cleaning fluid drops and falls below a predetermined switch-on value and a corresponding control signal can cause the control unit to switch the electric motor back on, using the speed previously stored in the volatile memory member as the starting speed, provided the non-volatile memory has not been deleted. Otherwise, the electric motor can use the fixed starting speed, which is stored in the non-volatile memory element, as the start speed.
- the high-pressure cleaning device has at least one rechargeable battery for supplying energy to the electric motor.
- the use of the at least one rechargeable battery makes it possible to operate the high-pressure cleaning device even when no external energy source, in particular no public power supply network, is available.
- FIG. 1 shows a perspective view of a high-pressure cleaning device according to the invention, to which an ejector with a nozzle for dispensing pressurized cleaning fluid is connected via an outlet line;
- 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 an electric motor 14, a pump 16 and a control device 18 and a rechargeable battery 20 are arranged.
- the electric motor 14 drives the pump 16 and is powered by the rechargeable battery 20 with electrical energy.
- the control device 18 controls the electric motor 14.
- the high-pressure cleaning device 10 has a first connection element 22 and a second connection element 24.
- a supply line in particular a suction hose, can be connected to the first connection element 22 in order to supply the pump 16 with cleaning fluid to be pressurized.
- Such a supply line is known per se to a person skilled in the art and therefore not shown in FIG.
- an outlet line 26 is connected, which carries at its free end a dispensing member 28 with a replaceable nozzle 30 for dispensing the pressurized cleaning liquid.
- the dispensing member 28 is configured in the illustrated embodiment as a spray gun 32 and has a lever 34 which can be operated by the user by hand to selectively enable and interrupt the flow connection between the outlet 26 and the nozzle 30. If the user releases the flow connection, a cleaning agent jet can be directed onto an object to be cleaned via the nozzle 30 If the user interrupts the flow connection, the dispensing of cleaning liquid is interrupted.
- the control device 18 is in signal-conducting connection via a signal line 36 to a pressure sensor 38, with which the pump outlet pressure of the cleaning fluid prevailing in the outlet line 26 can be detected.
- the pressure sensor 38 may be configured, for example, in the form of a pressure switch. This allows the controller 18 to turn on and off the electric motor 14 in response to the pump discharge pressure of the cleaning liquid. If the user interrupts the flow connection between the outlet line 26 and the nozzle 30 by means of the spray gun 32, the pump outlet pressure of the cleaning liquid rises. If the pressure exceeds a predetermined switch-off value, then a control signal is transmitted from the pressure sensor 38 to the control device 18, which is thereby caused to switch off the electric motor 14.
- the pump outlet pressure of the cleaning fluid drops. If the pressure falls below a predetermined switch-on value, the pressure sensor 38 transmits a control signal to the control device 18 which causes the control device 18 to switch the electric motor 14 back on.
- the state of charge of the rechargeable battery 20 is monitored by the control device 18 and can be displayed to the user on a display device 40 of the high-pressure cleaning device 10.
- the control device 18 has in the illustrated embodiment, two operating modes, which differ in that the control device 18 controls the electric motor 14 at different speeds. In a first mode of operation, the controller 18 controls the electric motor 14 at a first speed, and in the second mode of operation, the controller 18 controls the electric motor 14 at a second speed, the second speed being higher than the first speed.
- the first speed may be 16,000 revolutions per minute and the second speed may be - 17 - wise 18,000 revolutions per minute.
- the control device has a controllable switching element 41.
- the control device 18 has a current detection element 42 and a voltage detection element 44.
- the actual value of the battery current that is the actual value of the supply current of the electric motor 14
- the battery 20 is detected by the battery 20
- the voltage detection element 44 the actual value of the output voltage of the battery 20, that is the actual value of the supply voltage of the electric motor 14 detected.
- the detection of the actual values takes place periodically at intervals of, for example, one or two seconds.
- the actual value of the battery current is transmitted to a signal processing element 46, and the actual value of the battery voltage is transmitted to the signal processing element 46 by the voltage detection element 44.
- the actual value of the battery voltage is multiplied by the signal processing member 46 with the actual value of the battery current. The multiplication gives the actual value of the electrical power consumption of the electric motor 14.
- the power consumption of the electric motor 14 is dependent on the size of an outlet opening 52 of the nozzle 30.
- the actual values of the supply current and the supply voltage of the electric motor are detected and the actual value of the electrical power consumption is calculated.
- the calculated actual value of the electric power consumption of the electric motor 14 is stored in a first memory element 48 of the control device 18 as a reference value.
- the actual values of the supply current and of the supply voltage of the electric motor 14 are detected periodically at intervals of, for example, one or two seconds And the current actual value of the electrical power consumption of the electric motor 14 calculated therefrom is compared with the reference value stored in the first memory element 48 with the aid of a comparison element 50 of the control device 18.
- the control device 18 changes its operating mode as a function of which operating mode it is currently in.
- the reference value stored in the first memory element 48 is replaced by the actual value of the power consumption present after the change, that is, any change in the power consumption exceeding the predetermined tolerance range leads to an update of the reference value stored in the first memory element 48.
- the control device 18 remains in its current operating mode, so that the rotational speed of the electric motor 14 remains unchanged, and the continuous monitoring of the electrical power consumption to be continued.
- control device 18 If the control device 18 is in its first operating mode and if, with the aid of the comparison element 50, it detects an increase in the electric power consumption of the electric motor 14 which exceeds the predetermined tolerance range of, for example, 10 watts, the control device 18 changes its operating mode, by switching to the second mode of operation and thus controlling the electric motor 14 at the higher second speed.
- the present after the change actual value of the electrical power consumption of the electric motor 14 is stored in the first memory member 48 and then serves during further operation of the electric motor.
- - 19 - motors 14 as updated reference value, which is compared by the comparator 50 with the periodically redetermined current actual value of the power consumption.
- control device 18 If the control device 18 is in the first operating mode and it detects a reduction in the electrical power consumption of the electric motor 14 with the aid of the comparison element 50, it retains its first operating mode. However, in this case too, the actual value of the power consumption present after the change in the power consumption is stored in the first memory element 48, which then serves as an updated reference value during further operation of the electric motor 14, which periodically recalculates from the comparison element 50 current actual value of the power consumption is compared.
- control device 18 If the control device 18 is in its second operating mode and it recognizes, with the aid of the comparison element 50, an increase in the electrical power consumption of the electric motor 14 which exceeds the predetermined tolerance range, it retains its second operating mode.
- the actual value of the power consumption present after the change of the power consumption is stored in the first memory element 48 and subsequently serves as an updated reference value during the further operation of the electric motor 14, which compares with the periodically re-determined current actual value of the Power consumption is compared.
- control device 18 If the control device 18 is in the second operating mode and if it detects a reduction in the electrical power consumption exceeding the predetermined tolerance range with the aid of the comparison element 50, the control device 18 switches to the first operating mode so that the electric motor 14 subsequently switches to the lower one first speed is controlled.
- the actual value of the power consumption present after the change in the power consumption is stored in the first memory element 48 and then serves as an updated reference value during the further operation of the electric motor 14, which comparator 50 20 is compared with the periodically redetermined current actual value of the power consumption.
- control device 18 If the electric motor 14 is switched off by the control device 18, the last available rotational speed of the electric motor 14 is stored in a volatile second memory element 54.
- control device 18 has a non-volatile third memory element 56, in which preferably a fixed predetermined starting rotational speed of the electric motor 14 is stored by the manufacturer.
- the control device 18 If the electric motor 14 is switched on again by the control device 18 after an interruption of operation, it calls the speed available before the last switching-off of the electric motor 14 from the volatile second storage element 54 and uses this as the starting rotational speed for the electric motor 14. Should the speed stored in the volatile second storage element 54 be erased due to a prolonged interruption in operation, then the control device 18 uses the fixed predetermined speed stored in the nonvolatile third storage element 56 as the starting speed for the electric motor 14.
- the control device 18 If the user makes a nozzle change by replacing the nozzle 30 with a nozzle with a larger or smaller outlet opening 52, this leads to a change in the electrical power consumption of the electric motor 14.
- This change is detected by the control device 18, as it the Lei monitored monitoring by periodically comparing the actual value of the electrical power consumption of the electric motor 14 with the stored in the first memory element 48 reference value.
- the control device 18 changes its operating mode and thus also changes the rotational speed of the electric motor 14.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Electric Motors In General (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2018/055965 WO2019170255A1 (de) | 2018-03-09 | 2018-03-09 | Steuerverfahren für ein hochdruckreinigungsgerät und hochdruckreinigungsgerät insbesondere zur durchführung des verfahrens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3762156A1 true EP3762156A1 (de) | 2021-01-13 |
| EP3762156B1 EP3762156B1 (de) | 2022-06-08 |
Family
ID=61628344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18711072.1A Active EP3762156B1 (de) | 2018-03-09 | 2018-03-09 | Steuerverfahren für ein hochdruckreinigungsgerät und hochdruckreinigungsgerät insbesondere zur durchführung des verfahrens |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3762156B1 (de) |
| CN (1) | CN111788015B (de) |
| WO (1) | WO2019170255A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3210082A1 (de) * | 1981-04-02 | 1982-10-21 | IWE Ingenieurgesellschaft für wirtschaftliche Energienutzung mbH, 6078 Neu-Isenburg | Verfahren und schaltungsanordnung zur regelung der drehzahl eines pumpenmotors |
| DE9013486U1 (de) * | 1990-09-25 | 1990-11-29 | Alfred Kärcher GmbH & Co, 7057 Winnenden | Hochdruckreinigungsgerät |
| DE4211788C2 (de) * | 1992-04-08 | 1994-03-10 | Kaercher Gmbh & Co Alfred | Hochdruckreinigungsgerät |
| DE102004003536A1 (de) * | 2004-01-23 | 2005-08-11 | BSH Bosch und Siemens Hausgeräte GmbH | Flüssigkeitsführendes elektrisches Haushaltsgerät |
| EP3159541A4 (de) * | 2014-06-20 | 2018-04-11 | Hitachi Koki Co., Ltd. | Flüssigkeitsausstossvorrichtung |
| CN106914439B (zh) * | 2015-12-28 | 2021-01-05 | 苏州宝时得电动工具有限公司 | 压力清洗机 |
| 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 |
-
2018
- 2018-03-09 CN CN201880090464.2A patent/CN111788015B/zh active Active
- 2018-03-09 WO PCT/EP2018/055965 patent/WO2019170255A1/de not_active Ceased
- 2018-03-09 EP EP18711072.1A patent/EP3762156B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP3762156B1 (de) | 2022-06-08 |
| CN111788015B (zh) | 2023-02-03 |
| WO2019170255A1 (de) | 2019-09-12 |
| CN111788015A (zh) | 2020-10-16 |
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