WO2013060386A1 - Nettoyeur haute pression - Google Patents

Nettoyeur haute pression Download PDF

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Publication number
WO2013060386A1
WO2013060386A1 PCT/EP2011/069026 EP2011069026W WO2013060386A1 WO 2013060386 A1 WO2013060386 A1 WO 2013060386A1 EP 2011069026 W EP2011069026 W EP 2011069026W WO 2013060386 A1 WO2013060386 A1 WO 2013060386A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
line
overflow valve
cleaning device
pump
Prior art date
Application number
PCT/EP2011/069026
Other languages
German (de)
English (en)
Inventor
Markus Fischer
Jürgen KLÖPFER
Original Assignee
Alfred Kärcher Gmbh & 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 Kärcher Gmbh & Co. Kg filed Critical Alfred Kärcher Gmbh & Co. Kg
Priority to DK11776190.8T priority Critical patent/DK2771134T3/en
Priority to PCT/EP2011/069026 priority patent/WO2013060386A1/fr
Priority to BR112014009619A priority patent/BR112014009619A2/pt
Priority to CN201180074277.3A priority patent/CN103889601B/zh
Priority to EP11776190.8A priority patent/EP2771134B1/fr
Priority to AU2011379616A priority patent/AU2011379616B2/en
Publication of WO2013060386A1 publication Critical patent/WO2013060386A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor

Definitions

  • the invention relates to a high-pressure cleaning device with an electric motor and a pump, wherein the pump has at least one pumping chamber into which at least one reciprocating piston is immersed and which is connected via an inlet valve to a suction line and an outlet valve to a pressure line, and wherein the pump has a first bypass line, via which the pressure line is connected to the suction line and in which a first overflow valve is arranged, wherein a closing body of the first overflow valve in dependence on a state variable of a flowing through the pressure line cleaning liquid automatically between a closing the first bypass line closed position and an open position releasing the first bypass line can be moved back and forth, and wherein the electric motor is automatically connected as a function of the flow rate of the cleaning fluid flowing through the pressure line d is switched off.
  • Such high-pressure cleaning devices are known from the publication DE 10 2009 049 096 AI.
  • a cleaning fluid such as water
  • pressurized and then, for example, be directed to an object via a pressure hose connectable to the pressure line and arranged at the free end of the pressure hose nozzle head.
  • the nozzle head for example a spray gun, can be manually opened and closed by the user. When closed
  • the pumped by the pump cleaning fluid can be recycled, that is, it can be returned from the pressure line back to the suction line. This can reduce the pressure in the pressure line and reduce the mechanical load on the pump.
  • the pressure line is connected to the suction line via a first bypass line, and a first overflow valve is arranged in the first bypass line. Is the Opened nozzle head, so flows through the funded by the pump cleaning fluid flows through the pressure line. As a result, a closing body of the first overflow valve automatically transitions into its closed position, so that the flow connection between the pressure line and the suction line is interrupted via the first bypass line. If the nozzle head is closed, cleaning liquid can no longer flow through the pressure line.
  • the first overflow valve thereby releases the flow connection between the pressure line and the suction line via the first bypass line, so that the cleaning fluid can be circulated. If the nozzle head is then opened again, then the cleaning liquid again flows through the pressure line and the closing body of the first overflow valve automatically assumes its closed position, so that the flow connection between the pressure line and the suction line is interrupted again via the first bypass line.
  • the transition of the first overflow valve thus takes place in dependence on the cleaning fluid flowing through the pressure line.
  • the state variable is the flow rate of the cleaning fluid.
  • the control of the closing body of the first overflow valve can be done for example by means of an actuator which is connected to the closing body of the first overflow valve and shifts the closing body in response to the state variable flowing through the pressure line cleaning liquid in its closed position or its open position.
  • the electric motor which drives the pump can be switched on and off independently of the flow rate of the cleaning fluid flowing through the pressure line.
  • the closing body of the first overflow valve is rigidly connected in the known from DE 10 2009 049 096 AI pump with a switching plunger, which operates a switching element for switching on and off of the pump.
  • Object of the present invention is to develop a high-pressure cleaning device of the generic type such that its energy consumption can be further reduced.
  • the pump has a second bypass line, which leads from the pressure line to the suction line and in which a second overflow valve is arranged, the closing body manually between a closing the second bypass line closed position and a the second bypass line releasing open position is movable.
  • the pump thus has two bypass lines, each of which allow a flow connection from the pressure line to the suction line and in each of which an overflow valve is arranged.
  • the overflow valve arranged in the first bypass line opens and closes in dependence on a state variable of the cleaning fluid flowing through the pressure line, for example as a function of the pressure or of the flow rate of cleaning fluid.
  • the first relief valve may release the first bypass passage as soon as the flow rate of the cleaning fluid passing through the pressure passage falls below a lower limit, and may lock the first bypass passage as soon as the flow rate of the cleaning fluid passing through the pressure passage exceeds a predetermined maximum value.
  • the closing body of the first overflow valve can in this case be coupled to a first switching element for switching the pump on and off, so that the pump can be switched off automatically as soon as the flow rate of the cleaning liquid flowing through the pressure line falls below the predetermined minimum value.
  • the first overflow valve releases the first bypass line as soon as the pressure of the cleaning liquid in the pressure line exceeds a predetermined maximum value, and the first overflow valve can block the first bypass line when the pressure of the cleaning liquid in the pressure line falls below a predetermined minimum value.
  • the pump may be turned on and off depending on the flow rate of the cleaning liquid, as described above.
  • the user can manually release and interrupt a second flow connection between the pressure line and the suction line if necessary.
  • the second bypass line is used, in which a second overflow valve is arranged.
  • the closing body of the second overflow valve is manually movable between a closed position closing the second bypass line and an open position releasing the second bypass line.
  • the manually operable second overflow valve gives the user the opportunity to return a portion of the conveyed cleaning fluid from the pressure line via the second bypass line to the suction line during operation of the pump.
  • the remaining part of the conveyed cleaning liquid can be discharged via the pressure line and, for example, be directed to an object to be cleaned.
  • the user can thus select automatically whether he wants to direct all the cleaning fluid that is pressurized by the pump to an object, or if he wants to direct only a part of the pumped by the pump cleaning liquid to the object.
  • the latter may be the case, for example, in the case of easy-to-clean objects for which a part of the cleaning fluid pressurized by the pump is already sufficient to remove the dirt.
  • the user can move the closing body of the second overflow valve into its open position and thereby release the flow connection from the pressure line via the second bypass line to the suction line. This in turn means that the water consumption of the pump is reduced.
  • the power consumption of the pump is reduced, since the pressure in the suction line increases when the closing body of the second overflow valve assumes its open position and pressurized cleaning fluid can flow via the second bypass line to the suction line. Due to this pressure increase in the suction line, the consumption of energy required by the pump to pressurize the cleaning liquid is lower than when the second overflow valve is closed.
  • the pump according to the invention is thus characterized in that a flow path from the pressure line to the suction line is released via a first bypass line in dependence on a state variable of the cleaning liquid flowing through the pressure line, and that irrespective of the state variable of the cleaning liquid flowing through the pressure line via a second Bypass line manually a flow path can be provided from the pressure line to the suction line.
  • This allows the user to selectively direct either 100% of the cleaning fluid pressurized by the pump via the pressure line to an object or less than 100% of the cleaning fluid. It is favorable if, when the second overflow valve is open, approximately one tenth to one third of the cleaning fluid pressurized by the pump can be returned to the suction line.
  • the first bypass line forms a first flow path from the pressure line to the suction line.
  • the second bypass line preferably forms a second flow path independent of the first flow path from the pressure line to the suction line.
  • the pump comprises a manually operable and a plurality of actuating positions having actuating means, by means of the actuating device, the electric motor of the pump on and off and the second overflow valve can be opened and closed.
  • both the pump on and off as well as the flow path of the pressure line to the suction line via the second bypass line can optionally be interrupted and released by means of a single actuator.
  • the actuating device has a plurality of actuating positions. The actuator makes it possible to turn off the pump or to operate in different modes.
  • a first mode of operation 100% of the cleaning fluid pressurized by the pump can be delivered via the pressure line and the pump can be automatically switched on and off in dependence on the cleaning fluid flowing through the pressure line, as already explained above.
  • the pump can also automatically depending on the through the pressure line
  • part of the cleaning liquid pressurized by the pump is circulated even when the nozzle head is open, that is, part of the pressurized cleaning liquid is directly from the pressure line via the second bypass line returned to the suction line.
  • the actuating device has an actuating element which is selectively connected between a first actuating position in which the pump is switched off, a second actuating position in which the pump is switched on and the second overflow valve is closed, and a third actuating position in which Pump is switched on and the second overflow valve is open, can be moved back and forth.
  • the actuating element can be designed, for example, in the manner of a switch, which has a plurality of switching positions. In the first operating position, the second overflow valve may be closed.
  • the actuating element is designed as a rotary switch.
  • the actuating element comprises a rotatably mounted switching shaft which is coupled to a switching element of the high-pressure cleaning device and to the second overflow valve.
  • the shift shaft can be manually rotated by the user about its longitudinal axis.
  • a first rotational position of the electric motor of the switching element which is coupled to the switching shaft, are turned off.
  • the second overflow valve can assume its closed position in this switching position, for example under the action of a return spring.
  • a second rotational position of the electric motor can be turned on, wherein the second overflow valve is closed, and in a third rotational position of the electric motor can be turned on and be open the second overflow valve.
  • the handling of the pump is particularly simple in such a configuration.
  • the switching shaft is directly connected to the switching element of the pump and is coupled via at least one coupling element with the second overflow valve.
  • the switching shaft can thus form a component of a rotary switch with which the high-pressure cleaning device can be manually switched on and off.
  • the switching shaft is used to actuate the second overflow valve so that it can be manually opened and closed by the user in order to be able to release the flow path via the second bypass line.
  • the coupling of the switching shaft with the second overflow valve can be done in different ways, for example, in that a switching cam is arranged on the switching shaft, which cooperates with at least one coupling element in dependence on the rotational position of the switching shaft, wherein via the coupling element, a movement of the switching shaft on the Closing body of the second overflow valve is transferable. Depending on which rotational position the shift shaft occupies, a movement of the shift shaft on the
  • Closing body of the second overflow valve are transmitted.
  • the coupling of the switching shaft with the second relief valve by means of a gate which is arranged on the switching shaft and cooperates with a coupling element, wherein via the coupling element, a movement of the switching shaft to the closing body of the second relief valve is transferable.
  • the slide can be configured, for example, in the form of a sleeve surrounding the shift shaft, which has on its outside a trained in the manner of a thread sliding surface or groove, against which a sliding block slidably, wherein the sliding block is arranged on a coupling element, which controls the movement of the sliding block transmits to the closing body of the second overflow valve.
  • the sliding block performs an axial movement relative to the longitudinal axis of the shift shaft, and this axial movement can be transmitted to the closing body of the second overflow valve with the aid of at least one coupling element, so that it goes from a closed position by a rotational movement of the switching shaft in its open position.
  • the actuating element of the actuating device is coupled via a pivot lever to the second overflow valve.
  • the pivot lever forms a force transducer, so that even a relatively large force can be exerted on the second overflow valve, even if the user acts on the actuating element with only a relatively small force. The handling of the pump is thereby further simplified.
  • the pivot lever is arranged on an outer side of a pump housing of the pump. This facilitates the assembly of the pivot lever.
  • the closing body of the second overflow valve is displaceably mounted and the pivot lever cooperates with the displaceable closing body.
  • the closing body of the second overflow valve can thus be moved back and forth between a closed position and an open position.
  • the force required to move the closing body can be exerted by the pivot lever on the closing body.
  • the pivot lever in turn cooperates with the actuating element of the actuator.
  • the pivot lever abut a switching cam or a backdrop that is fixed to a shift shaft.
  • the pivot lever is pivotally mounted about a pivot axis on the pump.
  • the pivot axis is preferably aligned parallel or perpendicular to the longitudinal axis of the piston of the pump.
  • the pivot lever has a long and a short lever arm in a particularly advantageous embodiment of the invention, wherein the long lever arm rests on the confirmation element and wherein the short lever arm acts on the closing body of the second overflow valve.
  • the long lever arm can be at least twice the length of the short lever arm. In particular, it can be provided that the length of the long lever arm is at least four times the short lever arm. The greater the differences in length between the two lever arms, the easier it is to act on the closing body with an actuating force, under the effect of which it goes from its closed position to its open position. In particular, with displaceable mounting of the closing body, it is advantageous if the long lever arm has at least four times the length of the short lever arm.
  • actuating force can be exerted on the long lever arm, a multiple of this actuating force can then be exerted by the short lever arm on the closing body of the second overflow valve.
  • the short lever arm on a lever body on which a pressure element is slidably mounted which cooperates with the closing body.
  • the pressure element is adjustable relative to the lever body.
  • manufacturing and assembly-related tolerances can be compensated in a simple manner.
  • a pressure spring is clamped between the lever body and the pressure element.
  • the pressure element can thereby be moved against a resilient restoring force relative to the lever body. This makes it possible to influence the actuating force exerted by the lever body on the pressure element on the closing body of the second overflow valve by selecting a specific compression spring, that is, a compression spring with a certain spring constant.
  • the closing body of the second overflow valve against a resilient return force from its closed position to its open position is movable.
  • the restoring force exerted on the closing body can be provided by a return spring of the second overflow valve, whose spring constant can be adapted to the spring constant of the compression spring of the short lever arm. This makes it possible in a particularly reliable manner to exert by pivoting the pivot lever an actuating force on the closing body of the second overflow valve, under the effect of which he goes from its closed position to its open position.
  • the second overflow valve and thus also the high-pressure cleaning device according to the invention are particularly insensitive to interference in such an embodiment and are characterized by a particularly long service life.
  • the closing body of the second overflow valve can be acted upon in its closed position by the pressure prevailing in the pressure line of the cleaning liquid with a closing force.
  • the pressure of the cleaning liquid prevailing in the pressure line acts in the direction of the closed position of the closing body of the second overflow valve, so that the closing body can be pressed close to a valve seat by the pressure of the cleaning liquid.
  • the transition of the closing body of the second overflow valve from its closed position into its open position then takes place counter to the effect of the pressure exerted by the cleaning fluid pressure. This ensures in a structurally simple manner that the closing body of the second overflow valve assumes its closed position when no manual actuating force is exerted on the closing body.
  • the closing body of the second overflow valve can be moved into its open position against the pressure of the cleaning liquid acting on it in the closed position by means of a displaceably mounted valve plunger.
  • the valve stem can be moved by the user, for example, with the aid of the above-explained pivot lever against the pressure acting on the closing body, wherein the valve stem transfers the closing body in its open position in which the closing body occupies a distance from the valve seat and thereby the flow path between the pressure line and the Suction line releases via the second bypass line.
  • the pump has a pump head which is mounted on a cylinder block, wherein the cylinder block has the at least one pumping chamber and wherein the pump head forms the suction line and the pressure line and a first receiving chamber for the first overflow valve and a second receiving chamber for the second overflow valve.
  • the two receiving chambers are advantageously each elongate and have parallel or perpendicular to each other aligned longitudinal axes.
  • the longitudinal axes of the receiving chambers are aligned parallel or perpendicular to the longitudinal axis of the pressure line of the pump in a particularly preferred embodiment of the invention.
  • a particularly simple assembly is achieved in a favorable embodiment of the invention in that the two receiving chambers of the pump head each having a passage which connects the receiving chambers with an annular channel, wherein the annular channel between the cylinder block and the pump head is arranged.
  • the bypass lines can be connected to the suction line.
  • a check valve is arranged in the second bypass line.
  • the check valve opens in the flow direction of the flowing from the pressure line via the second bypass line to the suction line cleaning liquid.
  • the check valve facilitates the venting of the pump. If there is air in the suction line or in the pumping chambers when the pump is started, it must first be removed from the pump via the pressure line. If the user already opens the second overflow valve when starting the pump, there is the possibility that the air still in the pump will not be discharged to the outside via the pressure line but will be circulated.
  • a check valve is used, which is connected in the second bypass line.
  • the check valve is disposed downstream of the second spill valve. The check valve automatically goes into its open position, provided that the second bypass line is flowed through by cleaning fluid, but it remains in his
  • FIG. 1 shows a side view of a first embodiment of a high-pressure cleaning device with a pump and an electric motor
  • FIG. 2 a front view of the high-pressure cleaning device from FIG. 1;
  • Figure 3 is a partial sectional view of the pump taken along line 3-3 in Figure 2;
  • Figure 4 is a partial sectional view of the pump taken along line 4-4 in Figure 2;
  • Figure 5 a simplified side view of the pump, wherein an actuating element assumes a first operating position
  • Figure 6 is a simplified side view of the pump, wherein the actuating element occupies a second operating position
  • Figure 7 is a simplified side view of the pump, wherein the actuating element occupies a third operating position
  • FIG. 8 a partial sectional view of the pump of a second embodiment of a high-pressure cleaning device according to FIG. 4;
  • FIG. 9 is a perspective view of a third embodiment
  • FIG. 10 a front view of the high-pressure cleaning device from FIG. 9 and FIG 11 shows a perspective view of a pivoting lever of the high-pressure cleaning device illustrated in FIGS. 8 and 9.
  • FIGS. 1 and 2 schematically show a first embodiment of a high-pressure cleaning device 10 according to the invention with a pump 12 and a liquid-cooled electric motor 14 which drives the pump 12.
  • the electric motor 14 comprises a motor housing 16, which is designed pot-shaped and has a cylindrical side wall 17 and a bottom wall 18.
  • the side wall 17 is surrounded by a cooling housing 20.
  • a cooling channel In the area between the side wall 17 and the cooling housing 20 is a cooling channel, not shown in the drawing, which surrounds the motor housing 16 and the cleaning liquid can be supplied via an input line 22 and from which the cleaning liquid via an outlet line 24 a suction inlet 26 of the pump can be supplied.
  • This makes it possible for the cleaning fluid to be pressurized by the pump 12 initially to be guided around the motor housing 16 of the electric motor 14, so that waste heat from the electric motor 14 can be dissipated by the cleaning fluid.
  • the pump 12 comprises a cylinder block 28 and a pump head 30, which is placed on the cylinder block 28 and on its side facing away from the cylinder block 28 end face 32 has a pressure outlet 34.
  • About the pressure outlet 34 can be discharged from the pump 12 under pressure set cleaning fluid.
  • a pressure hose can be connected, which carries at its free end a nozzle head, such as a handgun.
  • the pressurized cleaning fluid can be directed onto an object via the nozzle head.
  • an outer sealing ring 36 and an inner sealing ring 38 are arranged, which are concentric zuein- are aligned differently.
  • an annular channel 40 is arranged, which is formed in a rear end face 42 of the pump head 30.
  • the rear end face 42 is arranged on the side facing away from the end face 32 of the pump head 30.
  • the cylinder block 28 comprises a total of three pumping chambers, wherein in the drawing only one pumping chamber 44 is shown. In each pumping chamber plunges a piston, wherein in Figures 5, 6 and 7, a first piston 46 and a second piston 48 can be seen. All pistons are oscillated by a not shown in the drawing to achieve a better overview, known per se swash plate in the respective pumping chamber 44 and pushed out by a piston surrounding the respective coil spring 50 and 52 again from the pumping chamber 44, so that the Volume of the pumping chambers 44 changes periodically.
  • Each pumping chamber 44 is in fluid communication with a suction line 58 via an inlet line 54 formed in the cylinder block 28 into which an inlet valve 56 is inserted.
  • the suction line 58 extends from the suction inlet 26 to the annular channel 40 into which the inlet line 54 opens.
  • each pumping chamber 44 is in flow communication with a pressure line 68 oriented parallel to the longitudinal axis 66 of the pistons 46, 48.
  • the pressure line 68 leads to the pressure outlet 34.
  • a central pressure valve 70 is arranged and downstream of the pressure valve 70, the pressure line 68 receives a throttle element in the form of an injector 72.
  • a first receiving chamber 78 shown in Figure 3 and a second receiving chamber 80 shown in Figure 4 are formed in the pump head 30, each of the end face 32 parallel to the longitudinal axis 66 of the piston 46, 48 up to a first chamber floor 82 and a second chamber floor 84 extend.
  • the first chamber bottom 82 has a first passage 86 and the second chamber floor 84 has a second passage 88.
  • the two passages 86 and 88 connect the first receiving chamber 78 and the second receiving chamber 80 with the annular channel 40th
  • the first receiving chamber 78 is closed by a plug 90 in the region of the end face 32. In the region adjoining the plug 90, the first receiving chamber 78 defines a control chamber 92, to which a lower line section 94 of a bypass line 96 explained in more detail below adjoins.
  • the lower line section 94 receives a first overflow valve 98 and is connected via the first passage 86 with the annular channel 40 and via this with the suction line 58 in fluid communication.
  • the control chamber 92 is cylindrical and receives a sliding sleeve 100, in which an actuator in the form of a control piston 102 parallel to the longitudinal axis of the piston 46, 48 is slidably held.
  • the control piston 102 divides the control chamber 92 into a low-pressure chamber 104 facing the stopper 90 and a high-pressure chamber 106 facing away from the stopper 90.
  • the low-pressure chamber 106 is adjoined by the lower line section 94 of the first bypass line 96.
  • a sleeve-shaped valve housing 108 of the first overflow valve 98 is inserted in the lower line section 94 of the first bypass line 96.
  • the valve housing 108 defines a valve seat of a closing body 110 of the first overflow valve 98.
  • the closing body 110 forms a conical extension of a switching plunger 112, which is fixed to the control piston 102 and the valve housing 108 of the first overflow valve 98 passes through. With its free end facing away from the control piston 102, the switching plunger 112 abuts against a first switching element 114, which can be actuated by the switching plunger 112.
  • the first switching element 114 is integrated in an electronic control unit 116 of the high-pressure cleaning device 10.
  • the control electronics 116 is arranged in a receptacle 118 of the cylinder block 28.
  • the transverse bore 76 of the injector 72 arranged in the pressure line 68 is in fluid communication with the low-pressure chamber 104 via a control channel 120.
  • an upper line section 122 of the first bypass line 96 extends from the pressure line 68 to the high-pressure chamber 106.
  • the upper line section 122 is adjoined in the first receiving chamber 78 by the already mentioned lower line section 94 of the first bypass line 96 ,
  • the first bypass line 96 defined by the two line sections 122 and 94 forms a flow connection between the pressure line 68 and the suction line 58 in combination with the annular channel 40.
  • the first overflow valve 98 is arranged in the first bypass line 96, the closing body 110 of which selectively connects the first bypass line 96 interrupts or releases.
  • the position of the closing body 110 is predetermined by the control piston 102.
  • the position of the control piston 102 in turn depends on the flow rate of the cleaning fluid flowing through the pressure line 68. This will be explained in more detail below.
  • the pump chambers 44 can be supplied with to be pumped cleaning liquid previously the motor housing 16 of the electric motor 14 in
  • Circumferential has flowed around.
  • the cleaning liquid is pressurized due to the oscillating movement of the pistons, and the pressurized cleaning liquid is supplied to the pressure line 68 via the outlet conduits 60.
  • the pressurized cleaning fluid flows through the injector 72. This forms in the pressure line 68, a throttle point at which the flowing cleaning fluid suffers a dynamic pressure drop, so that the upstream of the injector 72 arranged portion of the pressure line 68 has a higher Pressure as the region of the pressure line 68 at the level of the transverse bore 76 of the injector 72.
  • the injector 72 is no longer flowed through by cleaning liquid and therefore omitted in the region of the constriction of the injector 72nd
  • the low-pressure chamber 104 and the high-pressure chamber 106 equal pressures result, and corresponding to a suitable dimension of the effective pressure surfaces of the control piston 102 becomes this displaced against the action of the compression spring 124 in the plug 90 away from the direction.
  • the switch plunger 112 is rigidly connected to the control piston 102, a movement of the control piston 102 also leads to an actuation of the first switching element 114. As a result, the electric motor 14 can be switched off. An operation of the electric motor 14 with a closed nozzle head is thereby avoided.
  • Operation of the pump 12 can be continued, wherein the flow connection between the pressure line 68 and the suction line 58 via the first bypass line 96 and the annular channel 40 is interrupted again.
  • the second receiving chamber 80 receives a cylindrical valve housing 126 of a second overflow valve 128.
  • the valve housing 126 is surrounded by a first sealing ring 130 and a second sealing ring 132 in the circumferential direction and has in the region between the two sealing rings 130, 132 a circumferentially extending annular groove 134 which is connected via a radially extending channel 136 with a passage 138 ,
  • the passageway 138 passes through the valve housing 126 in the longitudinal direction. It comprises a front channel section 140, which faces away from the second chamber floor 84, and a rear channel section 142, which faces the second chamber floor 84.
  • the diameter of the rear channel section 142 is larger than the diameter of the front channel section 140.
  • the passageway 138 forms a valve seat.
  • a spherical closing body 146 of the second overflow valve 128 is arranged, which is pressed by a closing spring 148 against the valve seat.
  • the closing spring 148 is supported on the one hand on the closing body 146 and on the other hand on a support body 150, which is arranged between the valve housing 126 and the second chamber bottom 84.
  • a second passage 152 extends, which also passes through the valve housing 126 in the longitudinal direction and extends from an end-side recess 154 of the valve housing 126 to a connecting channel 156 of the support body 150.
  • the connecting channel 156 forms a flow connection between the second through-channel 152 and the second passage 88, so that the second through-channel 152 is in fluid communication with the annular channel 40 via the connecting channel 156 and the second passage 88.
  • the annular groove 134 is connected via an obliquely to the longitudinal axis of the second receiving chamber 80 extending connecting line 158 with the region of the pressure line 68 upstream of the central pressure valve 70.
  • a throttle element in the form of an aperture 159 is inserted in the connecting line 158.
  • the connecting line 158 in combination with the channel 136, the rear channel portion 142, the front channel portion 140, the frontal recess 154, the second passage 152 and the connecting channel 156, a second bypass line 160 through which the pressure line 68 to the annular channel 40 and this is in fluid communication with the suction line 58.
  • the second bypass line 160 can be interrupted and released by the closing body 146 of the second overflow valve 128.
  • the closing body 146 of the second overflow valve 128 can be acted upon by a valve tappet 162 with a force which is opposite to the spring force of the closing spring 148 and the pressure of the cleaning fluid in the pressure line 68.
  • the valve tappet 162 is displaceably mounted in a guide sleeve 164 in the longitudinal direction of the second receiving chamber 80.
  • the guide sleeve 164 forms a front-side closure of the second receiving chamber 80 and is circumferentially surrounded by a sealing ring 166 which bears tightly against the wall of the second receiving chamber 80.
  • the pump 12 has an actuating device 168, which is arranged laterally next to a pump housing 170 of the pump 12.
  • the actuating device 168 comprises a switching shaft 172 aligned transversely to the longitudinal axis of the pump 12 and connected directly to a second switching element 174 of the control electronics 116.
  • the electric motor 14 of the high-pressure cleaning device 10 can be switched on and off by means of the second switching element 174.
  • a switching cam 176 is held on the switching shaft 174, which cooperates with a coupling element in the form of a two-armed pivoting lever 178 for opening the second overflow valve 128.
  • the pivoting lever 178 is pivotally mounted laterally on the pump housing 170 about a parallel to the longitudinal axis of the switching shaft 172 aligned pivot axis 180 and includes a long lever arm 182, which rests with its free end on the switching cam 176, and a short lever arm 184.
  • the long lever arm 182 is about five times as long as the short lever arm 184.
  • the short lever arm 184 comprises a lever body 186, which aligned with the valve stem 162 aligned comprises a stepped through-hole comprising a first bore portion 188 which faces away from the valve stem 162, and a second bore portion 190 which faces the valve stem 162.
  • the through-hole is characterized by a mushroom-shaped gene pressure element 192 penetrated.
  • a print head 194 of the print element 192 abuts the valve lifter 162, and a pressure shaft 196 of the print element 192 extends from the print head 194 through the second bore portion 190 and the first bore portion 188, extending from the first bore portion 188 in the direction away from the valve lifter 162 protrudes.
  • a securing ring 198 which can be pushed onto the pressure shaft 196 is fixed on the outside of the pressure shaft 196. With the aid of the securing ring 198, the position of the pressure element 192 relative to the lever body 186 can be adjusted.
  • the pressure shaft 196 is surrounded by a compression spring 200, which is supported, on the one hand, on a step 202 arranged between the first bore section 188 and the second bore section 190 and, on the other hand, on the print head 194.
  • the switching shaft 172 has three switching positions.
  • a first switching position is shown in FIG.
  • the electric motor 14 is switched off by means of the second switching element 174 and the switching cam 176 points in the pivot lever 178 facing away from the direction.
  • the pivot lever 178 is located directly on the switching shaft 172.
  • the pressure element 192 of the short lever arm 184 occupies a pivoted-back position, that is, a maximum distance from the guide sleeve 164 position.
  • the valve member 162 abutting the pressure element 162 exerts no actuating force on the closing body 146 of the second overflow valve 128.
  • the switching shaft can be converted by further rotation by 90 ° in its third switching position, which is shown in Figure 7.
  • the transition from the second shift position to the third shift position has no effect on the second shift element 174, so that the electric motor 14 remains turned on and thereby the pump 12 is still driven.
  • the pivot lever 168 is pivoted by the switching cam 176, so that the short lever arm 184 with its pressure element 192 of the guide sleeve 164 approaches.
  • Characterized the valve stem 162 is moved by the pressure element 192 in the direction of the closing body 146 so that it lifts off the valve seat and thereby releases the flow connection between the pressure line 68 and the suction line 58 via the second bypass line 160 and the annular channel 40.
  • the user thus has the option of using the shift shaft 172, the pump 12 on and off.
  • the user can choose to deliver 100% of the pressurized cleaning fluid via pressure line 68 or to recirculate some of the pressurized cleaning fluid. The latter has the consequence that the energy consumption of the high-pressure cleaning device 10 can be reduced.
  • FIG. 8 schematically shows a partial sectional view of a second embodiment of a high-pressure cleaning device according to the invention.
  • the second embodiment is largely identical to the first embodiment explained above with reference to FIGS. 1 to 7.
  • the same reference numerals are used in Figure 8 as in Figures 1 to 7 and with respect to these components reference is made to avoid repetition to the above explanations.
  • a check valve 210 connected to a valve ball 212 which forms the closing body of the check valve 210 and a valve spring 214 against a Valve seat of the check valve 210 is pressed.
  • the valve seat is formed by the suction line 58 facing the end portion of the passage 88.
  • the check valve 210 When the high-pressure cleaning device is started up, the check valve 210 initially assumes its closed position and thus blocks the flow connection from the pressure line 68 to the suction line 58 via the second bypass line 160, irrespective of the position of the second overflow valve 128. Air still in the pump can therefore not pass through the second Bypass line 160 pass from the pressure line 68 to the suction line 58, instead, the air in the pump is passed through the pressure line 68 to the outside.
  • the spring constant of the valve spring 214 is for this purpose chosen such that the pressure of the air in the pump can not open the check valve 210.
  • the pressurized cleaning fluid can open the check valve 210 against the force of the valve spring 214 and thus can pass via the second bypass line 160 from the pressure line 68 to the suction line 58, if the second overflow valve 128 assumes its open position.
  • the user has also in the illustrated in Figure 8 second embodiment of a high-pressure cleaning device according to the invention, with the aid of the switching shaft 172, the pump 12 on and off.
  • the user can select with the aid of the switching shaft 172 whether he wants to give 100% of the pressurized cleaning fluid via the pressure line 68 or if he wants to lead a portion of the pressurized cleaning fluid in the circuit, so that the energy consumption of the high-pressure cleaner is reduced ,
  • FIGS. 9, 10 and 11 A third embodiment of a high-pressure cleaning device according to the invention is shown schematically in FIGS. 9, 10 and 11, which is referenced 220 overall.
  • the high pressure cleaning device 220 is The same reference numerals are used for identical components in FIGS. 9 to 11 as in FIGS. 1 to 7, and with respect to these components, to avoid repetition, reference is made to the above explanations Referenced.
  • the electric motor 14 can be switched on and off independently of the flow rate of the cleaning fluid flowing through the pressure line 68, and it can function as a function of the flow rate of the cleaning fluid flowing through the pressure line 68 via the first bypass line 96, a flow path from the pressure line 68 to the suction line 58 of the high-pressure cleaning device 220 are released, as has already been explained in detail above.
  • the high-pressure cleaning device 220 also has a second bypass line 160, in which a second overflow valve 128 which can be manually actuated by the user is arranged.
  • the second overflow valve 128 is arranged in the high-pressure cleaning device 220 in a second receiving chamber, which is aligned perpendicular to the longitudinal axis of the first receiving chamber 78.
  • the cylindrical chamber wall 222 and the longitudinal axis 224 of the second receiving chamber become immediately clear from FIGS. 9 and 10.
  • the high-pressure cleaning device 220 uses an actuating device 226 with a switching shaft 228 whose longitudinal axis 230 is aligned parallel to the longitudinal axis 224 of the second receiving chamber.
  • a second switching element of the high-pressure cleaning device 220 can be actuated in a corresponding manner as with the switching shaft 172 of the high-pressure cleaning device 10 in order to switch the electric motor 14 on and off.
  • the switching shaft 228 is surrounded by a guide sleeve 234 which is rotatably connected to the switching shaft 228 and which forms on its outer side a link 236 in the form of a sliding surface, the first Gleit perennialabroughe 242 and second Gleit perennialabroughe 244 has.
  • the first sliding surface sections 242 extend in the circumferential direction of the guide sleeve 234 in a plane oriented perpendicular to the longitudinal axis 230 of the switching shaft 228, and the second sliding surface sections 244 have a pitch with respect to this plane, so that they are designed in the manner of a helix or a thread.
  • Two diametrically opposed sliding blocks 246, 248 respectively abut against a first sliding surface section 242 or a second sliding surface section 244.
  • the sliding blocks 246, 288 are rigidly connected to a fork-shaped pivoting lever 250 which is mounted pivotably about a pivot axis 252 aligned parallel to the longitudinal axis of the pressure line 68 on the pump housing 254 of the high-pressure cleaning device 220.
  • the pivot lever 250 performs a pivoting movement in dependence on the rotational position of the switching shaft 228, so that the second overflow valve of the high-pressure cleaning device 220 can be manually opened and closed.
  • the actuation of the second overflow valve takes place in a corresponding manner as in the high-pressure cleaning device 10.
  • the high-pressure cleaning device 220 In a first switching position of the switching shaft 228, the high-pressure cleaning device 220 is turned off and the second overflow valve assumes its closed position. If the switching shaft 228 is rotated to a second rotational position, the electric motor 14 of the high-pressure cleaning device 220 is turned on, but the second overflow valve remains in its closed position, since the two sliding blocks 246, 248 only glide along a first sliding surface section 242 during this rotational movement and therefore their position Do not change relative to the switching shaft 228.
  • the sliding blocks 246, 248 slide along a second sliding surface section 244 and therefore execute a substantially axially aligned movement with respect to the longitudinal axis 230 of the switching shaft 228, so that the pivot lever 250 is pivoted about the pivot axis 252 and thereby the second overflow valve of the High-pressure cleaning device 220 is opened.
  • the user thus has the possibility of switching on and off the device in a very simple manner and, if necessary, releasing the second bypass line 160 in order to reduce the energy consumption of the high-pressure cleaning device 220.

Landscapes

  • Details Of Reciprocating Pumps (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

L'invention concerne un nettoyeur haute pression (10, 220) comprenant un moteur électrique (14) et une pompe (12) munie d'au moins une chambre de pompe (44) dans laquelle plonge au moins un piston (46, 48) apte à effectuer un mouvement de va-et-vient et qui est reliée à une conduite d'aspiration (58) par le biais d'une soupape d'admission (56) et à une conduite sous pression (68) par le biais d'une soupape d'évacuation (62). La pompe (12) présente une première conduite de dérivation (96) dans laquelle se trouve une première soupape de décharge (98) qui s'ouvre et se ferme automatiquement en fonction d'une grandeur d'état d'un liquide de nettoyage s'écoulant dans la conduite sous pression. Le moteur électrique (14) se met en marche et s'arrête automatiquement en fonction du débit du liquide de nettoyage s'écoulant dans la conduite sous pression. Pour réduire la consommation d'énergie du nettoyeur haute pression, la pompe (12) présente une deuxième conduite de dérivation (160) dans laquelle se trouve une deuxième soupape de décharge (128) dont le corps de fermeture (146) peut être déplacé manuellement entre une position de fermeture et une position d'ouverture.
PCT/EP2011/069026 2011-10-28 2011-10-28 Nettoyeur haute pression WO2013060386A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DK11776190.8T DK2771134T3 (en) 2011-10-28 2011-10-28 Pressure Washer
PCT/EP2011/069026 WO2013060386A1 (fr) 2011-10-28 2011-10-28 Nettoyeur haute pression
BR112014009619A BR112014009619A2 (pt) 2011-10-28 2011-10-28 aparelho para limpeza de alta pressão
CN201180074277.3A CN103889601B (zh) 2011-10-28 2011-10-28 高压清洁设备
EP11776190.8A EP2771134B1 (fr) 2011-10-28 2011-10-28 Nettoyeur haute pression
AU2011379616A AU2011379616B2 (en) 2011-10-28 2011-10-28 High pressure cleaning apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/069026 WO2013060386A1 (fr) 2011-10-28 2011-10-28 Nettoyeur haute pression

Publications (1)

Publication Number Publication Date
WO2013060386A1 true WO2013060386A1 (fr) 2013-05-02

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ID=44883269

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PCT/EP2011/069026 WO2013060386A1 (fr) 2011-10-28 2011-10-28 Nettoyeur haute pression

Country Status (6)

Country Link
EP (1) EP2771134B1 (fr)
CN (1) CN103889601B (fr)
AU (1) AU2011379616B2 (fr)
BR (1) BR112014009619A2 (fr)
DK (1) DK2771134T3 (fr)
WO (1) WO2013060386A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016015763A1 (fr) * 2014-07-30 2016-02-04 Alfred Kärcher Gmbh & Co. Kg Pompe à piston et appareil de nettoyage à haute pression équipé d'une telle pompe à piston
EP3233293B1 (fr) 2014-12-19 2021-06-30 Daniele Marino Dispositif d'émission d'un liquide

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019001720A1 (fr) * 2017-06-29 2019-01-03 Alfred Kärcher SE & Co. KG Appareil de nettoyage haute pression
CN109759373A (zh) * 2017-11-09 2019-05-17 苏州宝时得电动工具有限公司 多功能清洗机

Citations (5)

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Publication number Priority date Publication date Assignee Title
DE4445520C1 (de) * 1994-12-20 1996-07-04 Kaercher Gmbh & Co Alfred Kolbenpumpe für ein Hochdruckreinigungsgerät
DE19548497C1 (de) * 1995-12-22 1997-04-03 Kaercher Gmbh & Co Alfred Hochdruckreinigungsger{t
EP0793017A2 (fr) * 1996-03-01 1997-09-03 Alfred Kärcher GmbH & Co. Pompe pour appareil de nettoyage à haute pression
DE202005021232U1 (de) * 2005-10-11 2007-05-31 Alfred Kärcher Gmbh & Co. Kg Hochdruckreinigungsgerät
DE102009049096A1 (de) 2009-10-01 2011-04-07 Alfred Kärcher Gmbh & Co. Kg Pumpe für ein Hochdruckreinigungsgerät

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Publication number Priority date Publication date Assignee Title
EP2346621B1 (fr) * 2008-11-14 2013-05-01 Alfred Kärcher GmbH & Co. KG Appareil de nettoyage sous haute pression
CN201470633U (zh) * 2009-07-30 2010-05-19 熊猫通用机械集团有限公司 高压清洗机的关枪停机装置
WO2011044937A1 (fr) * 2009-10-14 2011-04-21 Alfred Kärcher Gmbh & Co. Kg Appareil de nettoyage haute pression
CN201529631U (zh) * 2009-11-11 2010-07-21 宁波蓝达实业有限公司 一种用于高压清洗机的溢流阀
CN101972750B (zh) * 2010-10-12 2011-12-28 大连大显精密轴有限公司 一种高压冲洗机

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4445520C1 (de) * 1994-12-20 1996-07-04 Kaercher Gmbh & Co Alfred Kolbenpumpe für ein Hochdruckreinigungsgerät
DE19548497C1 (de) * 1995-12-22 1997-04-03 Kaercher Gmbh & Co Alfred Hochdruckreinigungsger{t
EP0793017A2 (fr) * 1996-03-01 1997-09-03 Alfred Kärcher GmbH & Co. Pompe pour appareil de nettoyage à haute pression
DE202005021232U1 (de) * 2005-10-11 2007-05-31 Alfred Kärcher Gmbh & Co. Kg Hochdruckreinigungsgerät
DE102009049096A1 (de) 2009-10-01 2011-04-07 Alfred Kärcher Gmbh & Co. Kg Pumpe für ein Hochdruckreinigungsgerät

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016015763A1 (fr) * 2014-07-30 2016-02-04 Alfred Kärcher Gmbh & Co. Kg Pompe à piston et appareil de nettoyage à haute pression équipé d'une telle pompe à piston
EP3233293B1 (fr) 2014-12-19 2021-06-30 Daniele Marino Dispositif d'émission d'un liquide

Also Published As

Publication number Publication date
CN103889601A (zh) 2014-06-25
EP2771134A1 (fr) 2014-09-03
DK2771134T3 (en) 2016-06-06
EP2771134B1 (fr) 2016-03-23
BR112014009619A2 (pt) 2017-05-09
CN103889601B (zh) 2016-03-09
AU2011379616A1 (en) 2014-06-12
AU2011379616B2 (en) 2015-12-03

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