EP3237124A1 - Appareil de nettoyage à haute pression - Google Patents

Appareil de nettoyage à haute pression

Info

Publication number
EP3237124A1
EP3237124A1 EP15700504.2A EP15700504A EP3237124A1 EP 3237124 A1 EP3237124 A1 EP 3237124A1 EP 15700504 A EP15700504 A EP 15700504A EP 3237124 A1 EP3237124 A1 EP 3237124A1
Authority
EP
European Patent Office
Prior art keywords
pressure
unit
cleaning device
pressure cleaning
chamber
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
Application number
EP15700504.2A
Other languages
German (de)
English (en)
Other versions
EP3237124B1 (fr
Inventor
Manuel Berroth
Sven Dirnberger
Timo Spengler
Markus Fischer
Jürgen KLÖPFER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alfred Kaercher SE and Co KG
Original Assignee
Alfred Kaercher SE and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Alfred Kaercher SE and Co KG filed Critical Alfred Kaercher SE and Co KG
Priority to EP21202081.2A priority Critical patent/EP3991861A1/fr
Publication of EP3237124A1 publication Critical patent/EP3237124A1/fr
Application granted granted Critical
Publication of EP3237124B1 publication Critical patent/EP3237124B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
    • B01F25/31242—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow the main flow being injected in the central area of the venturi, creating an aspiration in the circumferential part of the conduit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/22—Control or regulation
    • B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
    • B01F35/2211—Amount of delivered fluid during a period
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/83—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices
    • B01F35/833—Flow control by valves, e.g. opening intermittently
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • 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
    • F04B49/08—Regulating by delivery pressure
    • 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
    • B08B2203/0217—Use of a detergent in high pressure cleaners; arrangements for supplying the same

Definitions

  • the invention relates to a high-pressure cleaning device with a high-pressure pump, comprising a suction chamber, at least one downstream pump chamber in which liquid is pressurized, and a the
  • the high-pressure cleaning device has an operating unit to which a discharge unit in the form of a low-pressure cleaning agent nozzle is arranged or connected and which can be brought via a high-pressure line to the pressure chamber in flow communication, and an admixing device, via which the liquid in the pressure chamber a cleaning chemical is admixed.
  • the liquid pressurized in the pumping space in the pressure space is mixed with the cleaning chemical and a mixture of liquid and cleaning chemical is provided.
  • the mixture is conveyed via the high-pressure line to the operating unit and discharged via the discharge unit in the form of the low-pressure cleaning agent nozzle.
  • Such a discharge unit can be used with the high-pressure cleaning device instead of an alternative usable discharge unit in the form of a high-pressure nozzle.
  • the high-pressure nozzle has a comparatively small opening cross-section, and liquid exits under high pressure with a comparatively low volume flow.
  • the low-pressure cleaning agent nozzle has a comparatively large opening cross-section, and the mixture of liquid and the cleaning chemical exits with a comparatively high volume flow and low pressure.
  • Object of the present invention is to develop a generic high-pressure cleaning device that is more user friendly.
  • This object is achieved according to the invention in a high-pressure cleaning device of the type mentioned above in that the high-pressure cleaning device can detect that a fluid pressure on the pressure side of the pump chamber falls below a threshold pressure, a control unit coupled to the detection unit, a reference unit coupled to the control unit, on which an indication for an operator can be provided that the high-pressure cleaning device assumes a detergent mode, as well as an input unit, via which the operator can specify a mixing ratio of the cleaning chemical with the liquid.
  • the idea flows in that when operating the operating unit of the high-pressure cleaning device using the low-pressure cleaning agent nozzle on the pressure side of the pump chamber is present in comparison to the use of a high-pressure nozzle rather low fluid pressure. Falling below a threshold pressure can be detected with the detection unit and the control unit is provided a signal in this regard.
  • the control unit evaluates the signal and can therefore conclude that the low-pressure cleaning agent nozzle is used as the discharge unit.
  • the control unit assumes that a detergent mode is being used. This is signaled to the operator via the notification unit. The operator is thus informed in a user-friendly manner that the high-pressure cleaning device assumes the detergent mode.
  • the operator can user friendly to specify the mixing ratio of the cleaning chemical with the liquid and thereby influence the cleaning effect.
  • the term "pressure side of the pump chamber” is understood in particular to mean that the fluid pressure can be detected on or in a space or a fluid line which is or are arranged downstream of a pressure valve separating the pump space from the pressure chamber. This may in particular also be understood as meaning a fluid line connected to or opening into the pressure chamber. It is advantageous if the liquid pressure in the high-pressure pump can be detected with the detection unit.
  • the undershooting of a threshold pressure on or in the pressure chamber can be detected with the detection unit.
  • the detection unit is arranged for this purpose at the pressure chamber or at a fluid line opening into this.
  • the mixing ratio can be predetermined step by step. For example, a plurality of mixing ratios is provided, which the operator can incrementally increment or decrement by input elements.
  • the mixing ratio can be predetermined continuously.
  • the reference unit can be designed in many ways. For example, it is an optical or acoustic reference unit.
  • the reference unit is or comprises a display unit.
  • the display unit may have an optical image display, on which the operator is symbolized the taking of the detergent mode. For example, a symbol of the low-pressure detergent nozzle is displayed.
  • the specification of the mixing ratio can also be displayed on the display unit.
  • the input unit and the display unit form an integrated input / display unit or are configured as such, for example as a touchscreen.
  • the hint unit information about the mixing ratio is preferably provided.
  • this preferably displayed on a display unit.
  • the display unit may indicate which level of the mixing ratio is selected by the operator.
  • the input unit and / or the reference unit are arranged on the operating unit or are encompassed by the same.
  • the operator can thereby be informed in a user-friendly manner on the operating unit about the taking of the detergent mode and / or specify the mixing ratio on the operating unit in a user-friendly manner.
  • a volume flow of the liquid conveyed by the high-pressure pump can be controlled via the input unit.
  • the mixing ratio can be influenced and also controlled. For example, it may be provided that in the detergent mode the liquid in the pressure chamber is admixed with a constant or substantially constant amount of cleaning chemical even with different volume flows. Due to the different volume flow of the pressurized liquid, this affects the mixing ratio of the liquid with the cleaning chemical.
  • the high-pressure pump comprises a return line, via which the pressure chamber is in fluid communication with the suction chamber, and a valve unit with which a free cross-sectional area of the return line can be changed, a drive unit associated with the valve unit and coupled to the control unit, the volume flow is controllable by the free cross-sectional area of the return line is variable depending on the predetermined mixing ratio.
  • this proves to be a reliable and structurally simple way of controlling the volume flow of the liquid conveyed by the high-pressure pump, depending on the specification of the operator. son to control.
  • the control unit can control the drive unit, so that the valve unit increases or decreases the free cross-sectional area of the return line.
  • the volume flow of the liquid is increased or decreased from the pressure chamber into the suction chamber.
  • the amount of liquid discharged from the high-pressure pump is thereby reduced or increased.
  • the mixing ratio can thereby be increased or reduced by adding a cleaning chemical.
  • valve unit can be adjusted in stages via the drive unit.
  • a valve body of the valve unit can assume different, discrete relative positions relative to a valve seat of the valve unit, the free cross-sectional area being different depending on the relative position.
  • the volume flow of the pumped liquid is controllable under control of a drive motor of the high-pressure pump.
  • a phase control is used to increase or decrease the volume flow by increasing or decreasing the engine power.
  • a high-pressure pump in the form of an axial piston pump may be provided to control the volume flow alternatively or additionally, that the drive motor has an adjustable swash plate, by adjusting the stroke of the axial piston can be changed.
  • the stroke By increasing the inclination of the swash plate, the stroke can be increased and the volume flow can be increased, by reducing the inclination angle of the swash plate, the stroke can be reduced and the volume flow can be reduced.
  • the admixing device has a receptacle for a container with the cleaning chemical, a arranged in the pressure chamber ten injector and a supply line from the receptacle to the injector.
  • the injector is designed such that the pressure in the pressure chamber when taking the detergent mode has an amount such that the injector sucks the cleaning chemical from the container via the feed line.
  • the aspirated chemical is mixed in the injector with the pressurized fluid. The mixture can be discharged via the low pressure detergent jet.
  • the return line and / or the feed line can also be referred to as a return channel or as a feed channel.
  • the injector is a venturi injector.
  • the volume flow of the liquid conveyed by the high-pressure pump is preferably controlled as a function of the specification of the operator on the input unit.
  • the amount of cleaning chemical that can be introduced via the injector can even be kept constant or substantially constant in the detergent mode, and a change in the volume flow changes the mixing ratio.
  • the high-pressure cleaning device in particular the high-pressure pump, alternatively or in addition to the return line and the valve unit, a metering valve, with which the dosage of the cleaning chemical and thus the mixing ratio can be influenced with the liquid.
  • the metering valve is coupled, for example, with the control unit and / or actuated depending on the specification of the operator on the input unit.
  • the metering valve is connected in the above-mentioned supply line.
  • the high-pressure cleaning device it proves to be advantageous if it is detectable with the detection unit, whether the fluid pressure in the supply line falls below the threshold pressure.
  • the fluid pressure at Pressure chamber with actuated operating unit to a relatively low value (in particular, the pressure is less than the ambient pressure of the atmosphere (approximately less than 1 bar)).
  • the injector in particular the venturi injector, can suck in the cleaning chemical via the supply line.
  • the detection of the pressure in the supply line to the pressure chamber proves to be reliable in practice, to ensure that the low-pressure detergent nozzle is provided as a discharge unit.
  • the detection unit comprises a pressure sensor.
  • the pressure sensor the pressure on or in the pressure chamber can preferably be measured over such a large pressure range that the pressure upon connection of a low-pressure detergent nozzle on the one hand and connection of a high-pressure nozzle on the other hand can be detected reliably, as will be discussed below.
  • the detection unit comprises a pressure switch, for example a membrane switch. If it is only necessary to determine whether the liquid pressure on or in the pressure chamber falls below or exceeds the threshold pressure, a pressure switch can be used in a structurally simple embodiment.
  • the high-pressure cleaner in the detergent mode assumes a non-control mode in which no regulation of the fluid pressure takes place.
  • the high-pressure cleaning device has a further discharge unit in the form of a high-pressure nozzle which can be connected to the operating unit or can be arranged thereon instead of the low-pressure detergent nozzle, and if it is detectable with the detection unit that the fluid pressure on the pressure side of the pump space exceeds a threshold pressure, wherein an indication that the high-pressure cleaning device assumes a high-pressure mode can be provided at the reference unit.
  • a threshold pressure preferably the threshold pressure mentioned above.
  • the control unit takes this as taking a high pressure mode.
  • the operator is pointed to the hint unit user friendly to the capture of the high pressure mode. For example, a symbol of a high-pressure nozzle is displayed on a display unit designed as a display unit.
  • the control unit can be predetermined by the operator preferably via the input unit, a fluid pressure, wherein the fluid pressure of the control unit is controllable.
  • the operator can influence the fluid pressure in a user-friendly manner via the input unit. Specifications can be evaluated by the control unit and implemented to control the fluid pressure.
  • the fluid pressure is in particular gradually predetermined.
  • a plurality of pressure stages of the high-pressure pump is provided, which the operator can specify via the input unit.
  • the pressure levels can be incremented or decremented using buttons.
  • the fluid pressure can be predetermined continuously.
  • the fluid pressure can be controlled as a function of the predetermined fluid pressure by changing the free cross-sectional area of the abovementioned return line.
  • the control unit can control the drive unit in such a way that the valve unit releases the return line at different rates.
  • the volume flow is increased or decreased from the pressure chamber to the suction chamber.
  • the pump pressure at the outlet of the high pressure pump can be reduced or increased in the high pressure mode.
  • a control of the fluid pressure under control of the motor unit for example, a phase control
  • / or via a change in the inclination of the swash plate in an axial piston pump is possible.
  • the high-pressure cleaning device assumes a control mode in the high-pressure mode in which a regulation of the fluid pressure takes place.
  • the detection unit comprises a pressure sensor with which the fluid pressure on the pressure side of the pump chamber can be determined even when taking the high-pressure mode.
  • a control is effected in particular by changing the free cross-sectional area of the above-mentioned return line by the control unit drives the drive unit of the valve unit in response to the signal from the pressure sensor and regulates the fluid pressure to the liquid pressure predetermined by the operator via the input unit.
  • the fluid pressure which can be detected by the detection unit, in particular the pressure sensor can be, for example, the pump pressure of the fluid, as it is present at a pump outlet of the high-pressure pump.
  • the fluid pressure can also be a pressure coupled to the pump pressure, so that the latter can be determined by measuring the fluid pressure via a known relationship between the fluid pressure and the pump pressure.
  • the pump outlet is arranged, for example, at the pressure chamber or is in fluid communication therewith.
  • the reference unit is preferably a display unit, to which the operator can be displayed an information associated with the predetermined fluid pressure. For example, in stepwise specification of the liquid pressure, the pressure level respectively predetermined by the operator is displayed on the display unit. Alternatively or additionally, it can be provided that at the display unit, an absolute value of the liquid pressure or a pump pressure at the outlet of the high-pressure pump is displayed.
  • the display unit is preferably the same display unit as is displayed with information on the mixing ratio of the cleaning chemical with the pressurized liquid when the detergent mode is taken.
  • the display unit may display different image contents depending on the presence of the detergent mode or the high-pressure mode.
  • the input unit comprises input elements with which the mixing ratio can be predetermined in the presence of the detergent mode and the liquid pressure can be predetermined in the presence of the high-pressure mode.
  • the same input elements can be used to set the liquid pressure in the high-pressure mode on the one hand and to specify the mixing ratio of the liquid and the cleaning chemical on the other hand. Separate input elements are not required.
  • the high pressure washer proves to be more user friendly.
  • Figure 1 is a perspective view of a high-pressure cleaning device according to the invention, comprising a high-pressure pump;
  • FIG. 2 shows a display unit and an input unit of an operating unit of the high-pressure cleaning device from FIG. 1;
  • FIG. 3 the display unit and the input unit, when the high-pressure cleaner occupies a high-pressure mode, symbolizing six different pressure levels
  • FIG. 4 shows the display unit and the input unit when the high-pressure cleaning device assumes a detergent mode, symbolizing three different dosages of a cleaning chemical
  • Figure 5 is a plan view of the high-pressure pump of the high-pressure cleaning device of Figure 1;
  • FIG. 6 a side view of the high-pressure pump
  • Figure 7 is a sectional view (partly) taken along the line 7-7 in Figure 5;
  • Figure 8 is a sectional view (partly) taken along the line 8-8 in Figure 6;
  • Figure 9 is a sectional view (partially) taken along the line 9-9 in Figure 5, wherein a valve unit of the high-pressure pump assumes a closed position;
  • Figure 10 is a view corresponding to Figure 9, wherein the valve unit occupies an open position and also a drive device is shown, which is associated with the valve unit.
  • FIG. 11 shows an enlarged view of detail A in FIG. 9 and FIG. 11
  • FIG. 12 shows an enlarged view of detail B in FIG. 10.
  • FIG. 1 shows a perspective view of an occupied by the reference numeral 10 advantageous embodiment of a high-pressure cleaning device according to the invention.
  • the high-pressure cleaning device 10 comprises a motor pump unit 12 which is shown only schematically and which comprises a drive motor 14 and a high-pressure pump 16.
  • the high pressure pump 16 is flanged to the drive motor 14.
  • the high-pressure pump 16 has a pump inlet 18, to which a supply line for pressurized liquid, in particular water, can be connected.
  • the high-pressure pump 16 has a pump outlet 20, to which a high-pressure line 22, in the present case a high-pressure hose, can be connected for pressurized liquid.
  • an operating unit 24 of the high-pressure cleaning device 10 is connected, designed as a high-pressure gun 26th
  • an input unit 28 is arranged, which comprises input elements for actuation by an operator.
  • the input elements have in particular a key "+" 30 and a key "-" 32.
  • the high pressure gun 26 further includes a display unit 34.
  • the display unit 34 is adjacent to the input unit 28, for example.
  • the input unit 28 and the display unit 34 could also be integrated with each other and configured, for example, as a touchscreen.
  • the display unit 34 comprises an optical image display and forms an information unit of the high-pressure cleaning device 10. Notes can be visually displayed on the display unit 34.
  • the high-pressure cleaning device 10 has a discharge unit 36 in the form of a low-pressure cleaning agent nozzle 37. Furthermore, the high-pressure cleaning device 10 comprises a discharge unit 38 in the form of a high-pressure nozzle 39. Alternatively or additionally, the high-pressure cleaning device 10 may further comprise a discharge device 40, which comprises a plurality of discharge units. In particular, a discharge unit 41 is provided, configured as a low-pressure cleaning agent nozzle 42, and a discharge unit 43 configured as a high-pressure nozzle 44.
  • the operator may connect the discharge unit 36, the discharge unit 38, or the discharge device 40 to the high pressure gun 26 and fluidly communicate therewith.
  • the operator may optionally select the low pressure detergent jet 42 or select the high pressure nozzle 44 and thereby bring it into fluid communication with the high pressure line 22.
  • a different cross section is provided on the output side, through which the pressurized liquid emerges.
  • cleaning fluid exits under high pressure with a small cross-sectional area and rather low volume flow.
  • the low-pressure detergent nozzles 37 and 42 have a much larger opening cross section, and liquid exits at a high volume flow and under rather low pressure.
  • a high-pressure nozzle 39 or 44 on the one hand or a low-pressure detergent nozzle 37 or 42 on the other hand affects the operator in the operation of the high-pressure cleaner 10 with the operating unit 24, the pressure at the output of the respective nozzle. This also influences the pressure in the high-pressure line 22 and on the output side of the high-pressure pump 16.
  • the high-pressure pump 16 is designed as a piston pump and in particular as an axial piston pump.
  • the high-pressure pump 16 comprises a main body 46, in which a plurality of axial pistons (an axial piston 48 shown) are mounted linearly displaceable.
  • the drive motor 14 comprises a swash plate, not shown in the drawing, by the rotation of the axial piston 48 are moved.
  • the high pressure pump 16 has a suction chamber 50, which is fluidly connected to the pump inlet 18 or this forms.
  • the suction chamber 50 opens into a pump chamber 52, between which a suction valve 54 is connected. Sucked liquid can enter the pump chamber 52 and is pressurized therein by the axial piston 48.
  • the pump chamber 52 opens into a pressure chamber 56, between which a pressure valve 58 is connected.
  • the pressure space 56 is subdivided into a first space area 60 and a second space area 62. Liquid flowing out of the pump space 52 enters the first space area 60. Between the space regions 60, 62, a check valve 64 is inserted. During operation of the high-pressure pump 16, the check valve 64 can assume an open position, and liquid flows through the space regions 60 and 62 to the pump outlet 20.
  • the pump outlet 20 is formed by the pressure chamber 56 on the output side or is in flow communication therewith.
  • An advantageous embodiment of the high-pressure pump such as the high-pressure pump 16, comprises a so-called transfer valve with an overflow valve arranged therein.
  • a so-called transfer valve with an overflow valve arranged therein.
  • control line 66 In the pressure chamber 56 opens at the second space portion 62, a control line 66.
  • the control line 66 may also be referred to as a control channel.
  • Liquid in the pressure chamber 56 can thereby pressurize the overflow valve 68 of an overflow 70. If the high-pressure gun 26 is no longer actuated during operation of the high-pressure cleaning device 10, this leads to a pressure surge via the high-pressure line 22 into the pressure chamber 56. In a conventional manner, the pressure surge via the control line 66 leads to an application of the overflow valve 68 causes the Matterströmerventil 68 opens and a valve stem 72 of the overflow 70 is moved.
  • the valve stem 72 may actuate a switching element, not shown in the drawing, for example a microswitch.
  • the switching element is connected via a signal line 74 to a control unit 76 of the high-pressure pump 16 in conjunction.
  • the switching element can be directly connected to the drive motor 14 in operative connection.
  • the Control unit 76 via a control line 78 (or the switching element), the drive motor 14 off, so that the drive of the high-pressure pump 16 is set in the absence of actuation of the high pressure gun 26 out of force. If the high pressure gun 26 is pressed again, the drive motor 14 is reactivated.
  • the high pressure cleaner 10 includes an admixer 80 for adding a cleaning chemical to the pressurized fluid.
  • the admixture of the cleaning chemical is intended for operation with the low-pressure detergent nozzles 37 and 42.
  • the admixing device 80 comprises at the high-pressure cleaning device 10 a receptacle 82 for a container 84 in which the cleaning chemical is stored.
  • the receptacle 82 is connected via a supply line 86, which is partially covered by the base body 46, with the pressure chamber 56 in flow communication.
  • the control line 66 preferably forms a portion of the supply line 86.
  • a check valve 88 is connected, for example, near the overflow 70.
  • the feed line 86 may also be referred to as a feed channel.
  • the admixing device 80 further comprises an injector 90, which is designed here as a Venturi injector.
  • the injector 90 is arranged in the pressure space 56, in particular in the second space area 62.
  • the feed line 86 opens in the second space area 62 into the suction side of the injector 90.
  • the fluid pressure in the supply line 86 drops so far due to the suction of the injector 90 that the check valve 88 opens.
  • the cleaning chemical can flow through the suction of the injector 90 via the supply line 86 into the injector 90 and is mixed with the liquid.
  • the mixture of liquid and makesschemika- lie flows to the low-pressure cleaning agent nozzle 37, 42 and can be discharged via this.
  • the high pressure nozzle 39 or 44 is connected to the high pressure gun 26, the pressure in the high pressure line 22 and thus in the pressure chamber 56 is so high that the suction effect of the injector 90 is eliminated.
  • the pressure in the supply line 86 is also high, the check valve 88 remains closed, and no cleaning chemical is sucked.
  • the high-pressure cleaning device 10 By connecting or selecting a low-pressure cleaning agent nozzle 37, 42, the high-pressure cleaning device 10, and in particular the high-pressure pump 16, can thereby be converted into a detergent mode. Conversely, when the high-pressure nozzle 39 or 44 is connected or selected, the high-pressure cleaning device 10 and in particular the high-pressure pump 16 assumes a high-pressure mode.
  • the high-pressure pump 16 comprises a return line 92. Via the return line 92, the pressure chamber 56 is flow-connected to the suction space 50.
  • the return line 92 has a first portion formed in the main body 46, which opens into the pressure chamber 56 and in particular its first space portion 60 ( Figure 8).
  • the first section 94 is followed by a second section 96, which forms a valve chamber 98.
  • the valve space 98 is adjoined by a third section 100, which opens into the suction chamber 50 (FIG. 7).
  • the second and the third section 96, 100 are formed in the base body 46.
  • the return line 92 may also be referred to as a return channel.
  • the high-pressure pump 16 comprises a valve unit 102, via which the free cross-sectional area of the return line 92 is variable.
  • the valve unit 102 includes a valve body receiving portion 104 inserted into the valve space 98 and a valve body 106.
  • the valve body 106 is configured as a valve pin 108.
  • the valve body receiving part 104 forms a valve seat 110 for the valve pin 108.
  • the valve pin 108 can bear in a closed position (FIGS. 9 and 11) on the valve seat 110 with a valve body sealing section 112 in a sealing or substantially sealing manner.
  • the return line 92 is closed.
  • An elastic element in the form of a helical spring 104 acts on the valve pin 108 with a force directed towards its closed position.
  • the high pressure pump 16 includes a drive unit 116 associated with the valve unit 102.
  • the drive unit 116 is configured in particular as an electric drive unit and is in electrical connection with the control unit 76 via a control line 118.
  • the control unit 76 may drive the drive unit 116 to move the valve pin 108 from the closed position to at least one open position and vice versa.
  • the valve pin 108 can be displaced in the return line 92 and relative to the valve body receiving part 104. The transferring of the valve pin 108 from the closed position into the at least one open position takes place counter to the closing force of the helical spring 114.
  • the drive unit 116 is shown only schematically in the drawing (in Figures 5 and 10).
  • the drive unit 116 comprises a spindle drive.
  • the spindle drive can linearly move a plunger 120, which is coupled to the valve pin 108 and fixedly connected to it, for example.
  • the plunger 120 is arranged on the side facing away from the coil spring 114 of the valve pin 108.
  • the drive unit 116 may have a retaining projection 146, which engages in the base body 46.
  • the valve unit 102 can be held in the valve chamber 98.
  • the retaining projection 146 is positively and / or positively inserted into the valve body 46.
  • the valve unit 102 may be supported on the retaining projection 146 against the pressure acting on it in the return line 92.
  • the retaining projection 146 may preferably support a sealing element 148.
  • the sealing element 148 seals between the valve chamber 98 and the holding projection 146.
  • the sealing element 148 is configured as an O-ring surrounding the valve pin 108.
  • the valve body sealing portion 112 is formed, for example, on an annular collar 122, on which the coil spring 114 is supported on the opposite side.
  • the valve pin 108 Starting from the valve body sealing portion 112, the valve pin 108 first comprises a first, cylindrical portion 124 and then a second, conical portion 126.
  • the cylindrical portion 124 is dimensioned so that the valve pin 108 is disposed with some play in the valve body receiving part 104. If the valve pin 108 lifts off the valve seat 110, liquid can flow through the return line 92.
  • the conical section 126 is tapered conically, in particular, the valve pin 108 is tapered twice conically. As the distance from the valve body sealing portion 112 increases, the taper increases. In the present case, this can be understood in particular to mean that the change in the diameter and thus in the cross section of the valve pin 108 increases per adjustment path or length of the valve pin 108. In the opposite direction of the direction for the transfer of the valve pin 108 from the closed position to the at least one open position, the valve pin 108 therefore has a taper, which increases with increasing distance from the valve body sealing portion 112.
  • a further cylindrical portion 128 of the valve pin 108 adjoins the conical portion 126 at a greater distance from the valve body sealing portion 112 than the latter.
  • the sealing element 148 surrounds the cylindrical portion 124.
  • the liquid flows axially through the return line 92 past the valve seat 110 (in the longitudinal direction of the valve pin 108) and then downstream of the valve seat 110 radially away from the valve pin 108.
  • the return line 92 is therefore aligned radially downstream of the valve seat 110 radially with respect to the longitudinal direction of the valve pin 108.
  • a passage 130 is formed in the third portion 100 in the valve body receiving part 104.
  • a pressure valve 132 Downstream of the valve unit 102, a pressure valve 132 is provided in the return line 92.
  • the pressure valve 132 is configured as a valve ring 134, in particular as an O-ring.
  • the valve ring 134 surrounds the valve body receiving part 104 and can seal the passage 130 and thus the return line 92 sealingly or substantially sealingly. If the pressure in the return line 92 exceeds a threshold pressure, the pressure valve 132 opens. If the pressure is below a threshold pressure, the return line 92 is closed.
  • the pressure valve 132 has the purpose that upon startup of the high-pressure pump 16, a suction operation (liquid is sucked on the pump inlet 18, which is not connected to a pressure line) can be performed, even if the valve pin 108 assumes an open position.
  • the pressure valve 132 prevents in this case that air is sucked in via the return line 92.
  • the high-pressure pump 16 further comprises a detection unit 136. With the detection unit 136 can be detected when a fluid pressure on the pressure side of the pump chamber 52 falls below a threshold pressure. In addition, it can be detected via the detection unit 136 when a threshold pressure is exceeded.
  • the falling below or exceeding a threshold pressure in the high-pressure pump 16 and preferably on or in the pressure chamber 56 can be detected, in particular in a connected to this or opening into this liquid line.
  • the detection unit 136 comprises a pressure sensor 138 or is designed as such, with which the fluid pressure can be measured.
  • the pressure sensor 138 is arranged on the high-pressure pump 116 so that a fluid pressure in the supply line 86 can be detected, which opens into the pressure chamber 56.
  • the pressure in the supply line 86 is related to the pump pressure of the high-pressure pump 16, which is present at the pump outlet 20 in relation. By detecting the fluid pressure in the supply line 86 at the pressure chamber 56 can be closed by the pump pressure.
  • the pressure sensor 138 is connected, for example, to a measuring line 140, which is an extension of the control line 66.
  • the pressure sensor 138 is connected to the control unit via a signal line 142 in order to provide it with a signal corresponding to the fluid pressure.
  • the measuring line 140 may also be referred to as a measuring channel.
  • a high pressure mode is provided and on the other hand a detergent mode.
  • the fluid pressure detectable by the pressure sensor 108 is regulated at the pressure chamber 56.
  • the valve unit 102 is driven to control the flow rate of the liquid to be dispensed, and thus to control the dosage of the cleaning chemical.
  • a high-pressure nozzle 39 or 44 is connected or selected, there is a high pressure in the pressure chamber 56 and thus also in the supply line 86 when the operating unit 24 is actuated.
  • the operator presets a pressure level via the keys "+" 30 and "-" 32. Each pressure stage corresponds to a pump pressure at the pump outlet 20 and thus to a related liquid pressure in the supply line 86.
  • FIG. 3 shows, by way of example, the display unit 34 in high-pressure mode in various pressure stages decreasing from top to bottom.
  • the specification of the operator is wirelessly transmitted from the input unit 28 to the control unit 76 coupled to it.
  • the control unit 76 actuates the drive unit 116.
  • the fluid pressure which is detected by the pressure sensor 138, is regulated by actuation of the drive unit 116.
  • the high-pressure cleaner 10 and in particular the high-pressure pump 16 assumes a control mode.
  • the high-pressure mode can be detected by the control unit 76 in that the pressure sensor 138 detects a liquid pressure above the threshold pressure in the supply line 86.
  • a symbol 143 of a high-pressure nozzle is shown on the display unit 34, for example. Also shown is information associated with the default by the operator. These are representations of the pressure levels symbolized by black bars or bars.
  • Information for changing the display unit 34 can be transmitted wirelessly from the control unit 76 to the display unit 34 coupled to it.
  • the return line 92 is closed, and the valve body sealing section 112 seals against the valve seat 110 (FIGS. 9 and 11).
  • the position of the valve unit 112 is changed by the valve pin 118 is transferred to an open position. This increases the free cross-sectional area of the return line 92, liquid flows from the pressure chamber 56 to the suction chamber 50, and the pump pressure at the pump outlet 20 is reduced. This is detected by the pressure in the supply line 86.
  • the pressure in the supply line 86 is controlled by driving the drive unit 116.
  • valve pin 108 If the valve pin 108 is transferred to an open position, the pressure valve 132 opens, so that a flow through the return line 92 is released.
  • the valve pin 108 is not shifted by the drive unit 116 to implement the lowest pressure level by the total possible displacement.
  • the displacement of the valve pin 108 takes place, for example, only to the extent of the conical portion 126 following the cylindrical portion 124 as far as the conicity of the portion 126 does not change. This corresponds to the area of constant taper of the conical section 126 and a change in the free cross-sectional area of the return line 92 per displacement, which is constant. If a low-pressure cleaning agent nozzle 37 or 42 is connected or selected, the large opening cross-section leads to the pressure drop in the supply line 86 when the operating unit 24 is actuated.
  • the pressure sensor 138 can be used to detect that the fluid pressure at the pressure chamber 56 is below a threshold pressure.
  • the control unit 76 analyzes the signal from the pressure sensor 138 and can determine that the detergent jet 37 or 42 is being used. The control unit 76 switches to a detergent mode. To the display unit 34 a related note is transmitted wirelessly. In particular, a symbol 144 for a low pressure detergent jet is shown.
  • the display unit 34 changes the image display from the high-pressure mode shown in FIG. 3 to the detergent mode shown in FIG.
  • the high-pressure cleaner 10 and in particular the high-pressure pump 16 assumes a non-control mode.
  • the fluid pressure detected by the pressure sensor 138 is no longer regulated.
  • the operator controls the position of the valve unit 102 via the keys "+" 30 and "-" 32. This has the consequence, in particular, that the free cross-sectional area of the return line 92 and the volume flow through it are controlled by the operator.
  • valve unit 102 opens, and by the increasing volume flow through the return line 92, the volume flow changes at the pump outlet 20. Since at the same time the cleaning chemical is sucked into the injector 90 via the supply line 86, the mixing ratio between the liquid and the cleaning chemical changes.
  • Figure 4 shows in this regard the respective image display of Display unit 34. Different mixing ratios are symbolized, for example, by a different number of lines or bars.
  • the situation of maximum dosage of the cleaning chemical is shown at the top in FIG. 4, ie a high mixing ratio of the cleaning chemical with the liquid (high proportion of the cleaning chemical). Downwards the mixing ratio of the cleaning chemical decreases.
  • the image display of the display unit 34 is at least partially "inverted" in the high-pressure mode and in the detergent mode. While in high pressure mode, the pressure levels are symbolized by bars with intermediate spaces, bars displayed in detergent mode in those spaces symbolize the mixing ratio of the cleaning chemical with the liquid.
  • the specification of the user on the keys 30 and 32 is implemented by the control unit 76 for controlling the drive unit 116.
  • the drive unit 116 moves the valve pin 108 so far that, depending on the selected cleaning chemical dosage (mixing ratio), the free cross-sectional area of the return line 92 is changed.
  • FIGS. 3 and 4 the representation on the display unit 34 for the pressure stage on the one hand (FIG. 3) and the mixing ratio on the other hand (FIG. 4) reflect opposite positions of the valve unit 102 and associated free cross-sectional areas of the return line 92.
  • the valve unit 102 In high-pressure mode, the valve unit 102 is closed at high pressure level (top in FIG. 3), open at low pressure level (bottom in FIG. 3).
  • the valve unit 102 is opened wider at a high level of detergent chemistry (top of Fig. 4) than is the case with a low level of detergent chemistry (bottom of Fig. 4).
  • valve pin 108 is displaced so far in the detergent mode that the change in the free cross-sectional area over the increasing Rejuvenation of the conical section 126 takes place.
  • Per Verstellweg of the valve body 106 therefore, the free cross-sectional area changes to a greater extent than is the case per displacement in the high pressure mode.
  • a high-pressure nozzle 39 or 44 is again connected or selected, it is again detected with the pressure sensor 138 when the operating unit 24 is actuated that the pressure in the supply line 86 again exceeds the first-mentioned threshold pressure.
  • the high-pressure cleaning device 10 switches to the high-pressure mode already explained.
  • the threshold pressures above which the high pressure mode or below which the detergent mode is detected may preferably be identical.
  • the geometry of the valve pin 108 which in particular has a double conical section 126, makes it possible to reliably ensure the different setting of the pressure stages and the regulation of the fluid pressure in the high-pressure mode.
  • the geometry can reliably adjust the volume flow of the liquid through the return line 92 and thus the mixing ratio of the cleaning chemical with the liquid. Therefore, the subdivision of the "control range" for the high pressure mode and the "control range” of the valve pin 108 allows reliable operation of the high pressure pump 16 in both the control mode and the non-control mode.
  • the high-pressure cleaning device 10 and the high-pressure pump 16 make it possible to switch over to a regulation of the liquid pressure or a control of the metering (of the mixing ratio) of the cleaning chemical, depending on the respective selected or connected discharge unit.
  • the input unit 28 for selecting the pressure stage or for selecting the mixing ratio is identical.
  • the display unit 34 represents the pressure stages or the stages for the mixing ratio. Therefore, device 10 is also characterized by a particularly user-friendly and intuitive operation.
  • the high-pressure pump has a valve 150, via which the dosage of the cleaning chemical and thus the mixing ratio with the liquid can be influenced.
  • a metering valve 150 is connected, for example, in the supply line 86.
  • FIG. 7 shows by way of example the arrangement of the metering valve 150, preferably upstream of the check valve 88 in the flow direction of the cleaning chemical.
  • the metering valve 150 may be manually operable or adjustable. It is also conceivable to actuate the metering valve 150 from the control unit 76 as a function of the specification of the operator on the input unit 28.
  • a control of the liquid pressure preferably only when the drive motor 14 is in operation. This can be determined, for example, by the control unit 76. This can be avoided that occurs when the drive motor 14 and consequently occurring change in the fluid pressure, which is detected by the pressure sensor 138, a superfluous pressure control.
  • the mode of operation between the high pressure mode and the detergent mode and vice versa is preferably switched only when the drive motor 14 is in operation, as well as the operating mode dependent content of the display unit 34.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

L'invention concerne un appareil de nettoyage à haute pression comprenant une pompe haute pression (16) qui comprend une chambre d'aspiration (50), au moins une chambre de pompe (52) disposée en aval de la chambre d'aspiration et dans laquelle du liquide est mis sous pression, et une chambre de pression (56) disposée en aval de la chambre de pompe (52), l'appareil de nettoyage à haute pression (10) présentant une unité de commande (24) sur laquelle se trouve ou à laquelle est raccordée une unité de déversement (36, 41) qui se présente sous la forme d'une buse intermédiaire de nettoyage basse pression (37, 42), et laquelle peut être mise en liaison fluidique avec la chambre de pression (56) via une conduite haute pression (22), ainsi qu'un dispositif d'incorporation (80) par l'intermédiaire duquel un produit chimique de nettoyage peut être incorporé au liquide dans la chambre de pression (56). Selon l'invention, pour apporter à cet appareil de nettoyage à haute pression des améliorations lui permettant d'être plus facile d'utilisation, l'appareil de nettoyage à haute pression (10) présente une unité de détection (136) qui sert à détecter qu'une pression de liquide côté pression de la chambre de pompe (52) prend une valeur inférieure à une valeur seuil de pression, une unité de commande (76) couplée à l'unité de détection (136), une unité d'avertissement (34) couplée à l'unité de commande (76) et au niveau de laquelle un avertissement peut être fourni à un utilisateur pour lui indiquer que l'appareil de nettoyage à haute pression (10) adopte un mode agent de nettoyage, et une unité de saisie (28) par l'intermédiaire de laquelle l'utilisateur peut prédéfinir un rapport de mélange entre le produit chimique de nettoyage et le liquide.
EP15700504.2A 2014-12-23 2015-01-20 Appareil de nettoyage à haute pression Active EP3237124B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21202081.2A EP3991861A1 (fr) 2014-12-23 2015-01-20 Appareil de nettoyage à haute pression

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014119559 2014-12-23
PCT/EP2015/051036 WO2016102075A1 (fr) 2014-12-23 2015-01-20 Appareil de nettoyage à haute pression

Related Child Applications (1)

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EP3237124A1 true EP3237124A1 (fr) 2017-11-01
EP3237124B1 EP3237124B1 (fr) 2021-10-13

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EP21202081.2A Withdrawn EP3991861A1 (fr) 2014-12-23 2015-01-20 Appareil de nettoyage à haute pression

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CN (1) CN106999992B (fr)
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Publication number Priority date Publication date Assignee Title
CN108286513A (zh) * 2018-04-18 2018-07-17 浙江斯普泳池有限公司 泳池机变频控制器
DE102018124657A1 (de) * 2018-10-05 2020-04-09 Washtec Holding Gmbh FLÜSSIGKEITSAUSSTOßVORRICHTUNG FÜR EINE FAHRZEUGWASCHANLAGE UND VERFAHREN ZU IHREM BETRIEB
EP4282546A1 (fr) 2022-05-24 2023-11-29 Andreas Stihl AG & Co. KG Appareil de nettoyage haute pression

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Publication number Priority date Publication date Assignee Title
DE2841018C2 (de) * 1978-09-21 1986-02-20 Guido 7919 Bellenberg Oberdorfer Hochdruckreinigungsgerät
DE3520170A1 (de) * 1985-06-05 1986-12-11 Guido Oberdorfer Wap-Maschinen, 7919 Bellenberg Reinigungsgeraet
US20040226578A1 (en) * 2003-05-14 2004-11-18 Michael Guest Priming pump for multi-functional cleaning machine
US20060108449A1 (en) * 2004-11-22 2006-05-25 Sodemann Wesley C Pressurized fluid delivery apparatus and nozzle kit
DE102005028116A1 (de) * 2005-06-13 2006-12-14 Alfred Kärcher Gmbh & Co. Kg Verfahren zum Steuern eines Reinigungsgerätes und Reinigungsgerät zur Durchführung des Verfahrens
US20130214059A1 (en) * 2012-02-17 2013-08-22 Briggs & Stratton Corporation Water spraying system
US20140119949A1 (en) * 2012-10-25 2014-05-01 Generac Power Systems, Inc. Pressure Washer

Also Published As

Publication number Publication date
EP3991861A1 (fr) 2022-05-04
CN106999992B (zh) 2020-03-06
WO2016102075A1 (fr) 2016-06-30
EP3237124B1 (fr) 2021-10-13
CN106999992A (zh) 2017-08-01

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