EP2620228A2 - Appareil de nettoyage haute pression - Google Patents

Appareil de nettoyage haute pression Download PDF

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Publication number
EP2620228A2
EP2620228A2 EP13165580.5A EP13165580A EP2620228A2 EP 2620228 A2 EP2620228 A2 EP 2620228A2 EP 13165580 A EP13165580 A EP 13165580A EP 2620228 A2 EP2620228 A2 EP 2620228A2
Authority
EP
European Patent Office
Prior art keywords
cleaning device
pressure cleaning
pump unit
motor
pressure
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
EP13165580.5A
Other languages
German (de)
English (en)
Other versions
EP2620228B1 (fr
EP2620228A3 (fr
Inventor
Bertram GRÖGER
Walter Schiffhauer
Lanfranco Pol
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
Publication of EP2620228A2 publication Critical patent/EP2620228A2/fr
Publication of EP2620228A3 publication Critical patent/EP2620228A3/fr
Application granted granted Critical
Publication of EP2620228B1 publication Critical patent/EP2620228B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/06—Mobile combinations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/001—Noise damping
    • F04B53/003—Noise damping by damping supports
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/08—Cooling; Heating; Preventing freezing
    • 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
    • B08B2203/0211—Case coverings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
    • B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
    • B08B2203/0223—Electric motor pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
    • B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
    • B08B2203/0235—Cooling the motor pump
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
    • B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
    • B08B2203/027—Pump details

Definitions

  • the invention relates to a high-pressure cleaner with a housing surrounding a motor pump unit comprising a liquid-cooled electric motor and a pump driven by the same, the pump having a suction inlet for supplying pressurized liquid and a pressure outlet for discharging pressurized liquid , And wherein the electric motor to the cooling liquid is supplied, which is then settable by the pump under pressure.
  • Such high-pressure cleaning devices are for example from the DE 9417662 U1 known. With their help, surfaces can be cleaned by directing a pressurized jet of liquid, such as a stream of water, at the surface.
  • the liquid to be pressurized is supplied to the pump via the suction inlet. It is then pressurized by the pump and discharged via the pressure outlet.
  • a high-pressure hose can be connected to the pressure outlet, at the free end of which, for example, a spray lance is arranged.
  • the electric motor forms a structural unit in combination with the pump and in many cases in combination with a transmission arranged between the pump and the electric motor. This is referred to below as the motor pump unit. It is pre-assembled in the manufacture of the high-pressure cleaner and then inserted into a housing surrounding the motor pump unit.
  • the electric motor of such high-pressure cleaning devices is often cooled by an air flow is generated by means of a fan driven by the electric motor, which is guided along the electric motor.
  • the housing has for this purpose ventilation openings, so that cooling air enter the housing can and can be led out of the housing after cooling of the electric motor.
  • the DE 9417662 U1 describes a high-pressure cleaning device, in which the electric motor can be cooled not only by cooling air but in addition also by liquid, which is then pressurized by the pump. For this purpose, the liquid is first led around the electric motor, and then it reaches the suction inlet of the pump and can be pressurized by it.
  • the operation of such high-pressure cleaning equipment is usually associated with a significant noise.
  • the object of the invention is to develop a high-pressure cleaning device of the type mentioned in such a way that it has a lower noise.
  • a fanless electric motor is used.
  • the cooling of the electric motor is thus not effected by a cooling air flow generated by a fan but by the liquid to be pumped by the pump.
  • This has the advantage that ventilation openings in the housing can be omitted.
  • the electric motor of the high-pressure cleaning device is designed as an asynchronous motor. This has the advantage that commutator and brushes account for the electric motor. As a result, the heat development of the electric motor can be significantly reduced. This in turn facilitates the cooling of the electric motor with liquid, without a cooling air flow must be generated.
  • a further reduction of the noise emission is achieved by the fact that the motor pump unit is mounted on vibration-damping buffer elements. A rigid contact of the Motor pump unit with the housing can thus be omitted. This prevents the transmission of sound from the motor pump unit via rigid mechanical components to the housing.
  • the motor pump unit is mounted via vibration-damping buffer elements.
  • the storage can be done directly on the housing via the buffer elements.
  • the high-pressure cleaning device has a separate support structure, for example a frame or a frame, which supports the motor pump unit via the vibration-damping buffer elements.
  • the motor pump unit is surrounded at least over a portion of its outer periphery of at least one sound-absorbing element.
  • a sound-absorbing element is arranged in the region of a back part and / or in the region of a front part of the housing.
  • the sound absorbing elements take the motor pump unit between them.
  • the housing has a floor and a ceiling, wherein a sound-absorbing element can also be arranged in the area of the floor and / or the ceiling.
  • At least one sound-absorbing element is designed as an insulating mat.
  • This can for example be made of a plastic material and in particular have a foam-like structure.
  • a suction nozzle can be connected to the suction inlet and / or a discharge nozzle can be connected to the pressure outlet be.
  • the free ends of the suction nozzle and the pressure nozzle can protrude from the housing.
  • Suction nozzle and discharge nozzle pass through this arranged on the housing passages.
  • the suction nozzle and / or the discharge nozzle passes through an insulating mat. The suction nozzle and / or the discharge nozzle is thus surrounded by the insulating mat in the region of the passage opening of the housing. This ensures that virtually no sound can escape from the housing via the passage opening of the respective nozzle.
  • suction nozzle and / or the discharge nozzle is mechanically decoupled from the edge region of the respective passage opening of the housing, because thereby no sound can be transmitted directly from the suction nozzle or from the discharge nozzle to the housing.
  • the housing has drain openings whose total opening area at a sound power level of the high-pressure cleaner in high pressure operation of a maximum of 78 dB (A) 3000 mm 2 Not exceeds. It has been shown that such outflow openings do not significantly affect the noise of the high-pressure cleaning device, but reliably prevent it in the event of a malfunction of the high-pressure cleaning device, that liquid comes into contact with live components of the high-pressure cleaning device. In the event of a malfunction, the liquid may rather flow out of the housing via the discharge opening before it comes into contact with live parts.
  • the high-pressure cleaning device may have discharge openings, but not exceed a total opening area of 3000 mm 2 . It can thus be provided in a structurally simple manner all safety requirements sufficient high-pressure cleaning device having a significantly reduced noise.
  • the maximum opening area of 3000 mm 2 is present when the high-pressure cleaning device has a maximum sound power level of 78 dB (A), measured according to the EN 60704 standard. By increasing the opening area, the sound power level, ie the noise development, could be increased.
  • the total opening area of the discharge openings is a maximum of 1500 mm 2 .
  • the outflow openings are arranged in a region of the housing which is adjacent to the pump.
  • the pump is preferably aligned in line with the motor shaft of the electric motor, in particular it can be provided that the electric motor, a subsequent to this transmission and the pump in the direction of the motor shaft arranged one behind the other are.
  • the outflow openings are preferably arranged only in the region of the housing which surrounds the pump, but not also in the region surrounding the electric motor. It has been shown that this allows a further reduction of the noise of the high-pressure cleaner.
  • the housing has a front part and a back part, which receive the motor pump unit between them, and if the discharge openings are arranged next to the pump in the back part.
  • the front part thus has neither ventilation openings nor drainage openings. As a result, the noise can be additionally kept low.
  • At least one drain opening is covered by a sound-absorbing element.
  • the housing has a plurality of drainage openings which are covered by a soundproofing element.
  • the drainage holes can be covered by an insulating mat.
  • the storage of the motor pump unit via vibration damping buffer elements is favorable in this case if at least two vibration-damping buffer elements are arranged on the outer circumference of the motor pump unit, which receive the motor pump unit between them and which are held on a support structure of the high-pressure cleaner.
  • the support structure may in this case be at least partially formed by the housing itself, but it may also be provided that a frame or a frame is used as the support structure.
  • vibration-damping buffer elements are diametrically opposed.
  • vibration-damping buffer elements are arranged on the outer circumference of the motor pump unit, which receive the motor pump unit between them and thus form an abutment, in particular for aligned perpendicular to the motor shaft forces.
  • the support structure of the high-pressure cleaning device may comprise, for example, a back part of the housing and a support bracket which can be fixed on the back part and surrounds the motor pump unit, wherein in each case at least one vibration-damping buffer element is arranged between the back part and the motor pump unit and between the support bracket and the motor pump unit.
  • at least one vibration-damping buffer element is arranged between the back part and the motor pump unit and between the support bracket and the motor pump unit.
  • only a single vibration-damping buffer element is arranged between the back part and the motor pump unit. It is particularly advantageous if only a single buffer element is arranged between the mounting bracket and the motor pump unit.
  • the mounting bracket can be releasably connected to the back, in particular, a screw connection between the support bracket and the back can be used.
  • the motor pump unit is held on the front side via at least one vibration damping buffer element on a support structure of the high-pressure cleaner.
  • the motor pump unit is connected to the end face with a support device, which is held on at least one vibration damping buffer element on the support structure.
  • a support device which is held on at least one vibration damping buffer element on the support structure.
  • the support device has a bridge part, which is fixed on the one hand to the pressure outlet and / or on the discharge nozzle and on the other hand with the interposition of at least one vibration-damping buffer element on the support structure. Via the bridge part, bearing forces acting parallel to the longitudinal axis of the motor pump unit can be transmitted to the support structure, the transmission of sound from the motor pump unit to the support structure being at least greatly reduced by the interposition of at least one vibration-damping buffer element.
  • a particularly compact embodiment of the high-pressure cleaning device according to the invention is characterized in that the suction nozzle is arranged next to the discharge nozzle. This facilitates the handling of the high-pressure cleaning device when connecting a supply hose and a pressure hose.
  • the bridge part on the one hand on the suction nozzle and the discharge nozzle and on the other hand with the interposition of at least one vibration damping Buffer element is fixed to the support structure.
  • the bridge part is thus defined both on the discharge nozzle and on the suction nozzle. This allows a particularly resilient storage of the motor pump unit.
  • the bridge part is preferably made of a plastic material, in particular it may be designed as an injection molded part.
  • the motor pump unit For switching on and off of the electric motor, the motor pump unit usually has a switching device with an actuating element which engages through an actuating opening of the housing.
  • actuating opening is defined by an opening edge of the housing, which forms a labyrinth in combination with the actuating element.
  • the provision of the layer ensures that virtually no sound can escape from the housing via the actuating opening.
  • the labyrinth forms a meandering flow path for the air between the interior of the housing and its outer space.
  • the labyrinth thus represents an insulating element, with the help of which the noise emission can be kept low.
  • the actuating element comprises an annular wall which covers the actuating opening on the inside and / or outside.
  • the annular wall is conveniently surrounded by a circumferential collar into which the opening edge of the housing dips.
  • the opening edge of the housing is preferably funnel-shaped.
  • the speed of the electric motor, regardless of the operating state of the high-pressure cleaner is less than 3600 revolutions per minute, if the electric motor is designed as an asynchronous motor with a mains frequency of 60 Hz, and less than 3000 revolutions per minute, if the electric motor is designed as an asynchronous motor with a mains frequency of 50 Hz. As a result, the noise can be kept very low.
  • the electric motor is designed as an asynchronous motor with a mains frequency of 60 Hz and regardless of the operating state of the high-pressure cleaner has a speed between 3100 and 3600 revolutions per minute, in particular a speed between 3100 and 3580 revolutions per minute. If the electric motor is designed as an asynchronous motor with a mains frequency of 50 Hz, it preferably has a speed between 2600 revolutions per minute and 3000 revolutions per minute, in particular a speed in the range from 2700 revolutions per minute to 2950 revolutions per minute, regardless of the operating state of the high-pressure cleaning device Minute.
  • the electric motor is preferably designed as a two-pole asynchronous motor.
  • the electric motor preferably has an electrical power of at most 3500 W. It can be provided, for example, that the maximum power of the electric motor is about 3400 W.
  • the overall noise development of the high-pressure cleaning device ie its sound power level, is preferably a maximum of 78 dB (A), measured according to the standard EN 60704 in high-pressure operation. It is particularly favorable when the sound power level of the high-pressure cleaning device in high-pressure operation is less than 77 dB (A), for example 76 dB (A). In low-pressure operation, the sound power level is usually even lower.
  • an inventive high-pressure cleaning device which is generally designated by the reference numeral 10. It comprises a motor pump unit 12 which is surrounded by a housing which has a front part 14 and a back part 16.
  • the front part 14 is designed in the form of a hood, which can be placed on the back part 16 and has a first passage opening 18 and a second passage opening 20 laterally next to one another in a lower area.
  • Above the two passage openings 18, 20, an actuating opening 22 is arranged, which in FIG. 2 is illustrated in a sectional view.
  • the back part 16 has a trough-like construction and comprises a back wall 24, to which a bottom wall 26 integrally connects in a lower region.
  • a ceiling wall 28 connects to the back wall 24.
  • a first side wall 30 and a second side wall 32 are laterally formed on the back wall 24.
  • preferably U-shaped handle part can be mounted on the top wall 28.
  • the two side walls 30 and 32 have on the outside each have a stub axle 34 on which an impeller 36 is rotatably supported.
  • the high-pressure cleaning device 10 is thus designed to be movable.
  • the motor pump unit 12 surrounded by the front part 14 and the back part 16 comprises an electric motor 38, which is configured as a fanless asynchronous motor with a mains frequency of 50 Hz or 60 Hz and has a cooling jacket 40 through which liquid can be passed for cooling the electric motor 38.
  • the electric motor 38 is adjoined by a swash plate gearbox 42, via which the electric motor 38 is connected to a pump 44 of the motor pump unit 12.
  • the pump 44 has a suction inlet 46, to which a suction nozzle 48 is connected.
  • the pump 44 comprises a pressure outlet 50, to which a discharge port 52 arranged laterally adjacent to the suction port 48 is connected. In the mounted state of the high-pressure cleaning device 10, the pressure port 52 passes through the first passage opening 18, and the suction port 48 passes through the second passage opening 20.
  • the motor pump unit 12 also has a switching device 56, by means of which the electric motor 38 can be switched on and off.
  • the switching device is designed as a rotary switch in the illustrated embodiment. It has a switching pin 58, which can be rotated in the illustrated embodiment about its longitudinal axis. At the free end of the switching pin 58, an actuating element of the switching device 56 is held.
  • the actuating element is designed in the form of a rotary knob 60, which is supported on a rotary knob holder 62, which is seated on a switch housing 64 of the switching device 56.
  • the knob 60 engages with a central, engageable by the user holding portion 66, the actuating opening 22 of the front part 14, the opening edge 68 is funnel-shaped.
  • the actuating opening 22 is covered by an integrally formed on the holding portion 66 annular wall 70 which is surrounded by a circumferential collar 72.
  • the funnel-shaped opening edge 68 of the actuating opening 22 dives with its free end in the annular space 74 between the circumferential collar 72 and the holding portion 66 of the knob.
  • a labyrinth 76 is formed between the rotary knob 60 and the actuating opening 22.
  • the labyrinth 76 reduces the emission of sound from the motor pump unit 12 through the actuation opening 22 into the area outside the high-pressure cleaning device 10.
  • the motor pump unit 12 is arranged between a first soundproofing element in the form of a first insulating mat 78 and a second soundproofing element in the form of a second insulating mat 80.
  • the first insulating mat 78 is positioned on the inside on the front part 14, and the second insulating mat 80 is arranged on the inside of the rear wall 24 of the back part 16.
  • the second insulating mat 80 has approximately centrally an opening 82 which surrounds a first vibration-damping buffer element 84 which is held on the rear wall 24.
  • the first buffer element 84 is made of a rubber-elastic material and is located in the transition region between the cooling jacket 40 and the gear 42 on the outer circumference of the motor pump unit 12.
  • Diametrically opposite the first buffer element 84 is located in the transition region between the cooling jacket 40 and the gear 42 on the outer circumference of the motor pump unit 12 to a second vibration-damping buffer member 86, which is also made of a rubber-elastic material.
  • the second buffer element 86 is held on a mounting bracket 88 which is substantially C-shaped and surrounds the motor pump unit 12 at the level of the cooling jacket 40.
  • the mounting bracket 88 is held on the back wall 24.
  • the two buffer elements 84 and 86 thus receive the motor pump unit 12 between them and form a bearing for the motor pump unit 12. Acting perpendicularly to the longitudinal axis of the motor pump unit 12 are absorbed by the two buffer elements 84 and 86.
  • a support means 90 is disposed between the front part 14 and the back part 16, on the parallel to the longitudinal axis of the motor pump unit 12 acting forces can be transmitted from the motor pump unit 12 to the back part 16 with the interposition of further vibration damping buffer elements. This will be explained in more detail below.
  • the support device 90 comprises a bridge part 92, which rests on the one hand on the suction nozzle 48 and the discharge nozzle 52 and on the other hand on ringdomen 94 and 96 of the back part 16.
  • the bridge part 92 has a first U-shaped bearing part 98 and a second U-shaped bearing part 100, which abut against the pressure port 52 and the suction port 48 and which cooperate with a clamp part 102 and 104, respectively, which the pressure port 52 and surrounds the suction nozzle 58 and is screwed to the respective bearing part 98 and 100, respectively.
  • the bridge part 92 has a first bearing ring 106 and a second bearing ring 108, which can be placed on the first screw dome 94 and on the second screw dome 96.
  • Interengaging third and fourth vibration damping buffer members 110, 112 are interposed between first bearing ring 106 and first screw dome 94, and interengaging fifth and sixth vibration damping buffer members 114, 116 are positioned between second bearing ring 108 and second screw dome 96. All buffer elements 110, 112, 114 and 116 are made of a rubber-elastic material.
  • the screw domes 94 and 96 are used in combination with other screw domes which are integrally formed on the back wall 24, the preparation of a screw connection between the front part 14 and the back part 16, in the front screwdrivers in the screw dome connecting screws can be screwed, the front part 14th succeed. Such screw connections are known per se to the person skilled in the art.
  • the screw domes 94 and 96 not only serve to produce a screw connection between the front part 14 and the back part 16, but they additionally form a bearing for the motor pump unit 12.
  • the buffer elements 110, 112, 114 and 116 held on the screw domes 94, 96 are clamped between the front part 14 and the back part 16.
  • the motor pump unit 12 is thus mounted on the back part 16 via the buffer elements 84, 86, 110, 112, 114 and 116, which forms a support structure for the motor pump unit 12 in combination with the mounting bracket 88 and the support means 90.
  • the storage of the motor pump unit 12 via the buffer elements 84, 86 and 110 to 116 ensures that mechanical vibrations (structure-borne noise) can not be transmitted via rigid mechanical components from the motor pump unit 12 to the back part 16. Since the motor pump unit 12 is arranged between the insulating mats 78 and 80, the transmission of airborne sound from the motor pump unit 12 to the front part 14 and the back part 16 is at least very difficult.
  • the first insulating mat 78 has passage openings 118, 120, which are penetrated by the pressure port 52 and the suction port 48.
  • the first insulating mat 78 thus surrounds the discharge nozzle 52 and the suction nozzle 48.
  • the two stubs 48 and 52 pass through the passage openings 18 and 20 of the front part 14, wherein they are mechanically decoupled from the front part 14 by a distance from the edges of the openings 18 and take 20. Mechanical vibrations of the motor pump unit 12 can thus not be transmitted directly to the front part 14 via the suction nozzle 48 and the discharge nozzle 52. Also airborne sound can practically not pass through the openings 18 and 20 to the outside, since the suction nozzle 48 and the discharge nozzle 52 are surrounded in this area by the first insulating mat 78.
  • the electric motor 38 is fanless.
  • the cooling of the electric motor 38 does not take place by means of a cooling air flow. Therefore, 16 cooling air openings can be omitted for both the front part 14 and the back part.
  • the cooling of the electric motor 38 is rather by means of the liquid which is supplied to the pump via the suction nozzle 48. Before the liquid can pass from the suction nozzle 48 to the suction inlet 46, it is supplied to the cooling jacket 40 via an inlet line 122. Inside the cooling jacket 40, the liquid is then circulated around the electric motor 38 to cool it, and then the liquid is directed to the suction inlet 46 via an outlet conduit 124.
  • the inlet conduit 122 thus forms, in combination with the outlet conduit 124, a conduit arrangement via which fluid which is to be pressurized by the pump 44 can first be supplied to the electric motor for cooling thereof.
  • ventilation openings for the front part 14 and the back part 16 can be dispensed with, since the cooling of the electric motor 38 is effected by the liquid to be pressurized by the pump 44.
  • the back part 16 of the pump 44 adjacent in the region of the bottom wall 26 first drain openings 126, and in which the bottom wall 26 immediately adjacent Region of the back wall 24 and the two side walls 30 and 32 second discharge openings 128 are arranged.
  • the discharge openings 126 and 128 are arranged in side regions of beads formed in the back part 16 and in their entirety have an opening area of less than 3000 mm 2 , in particular an opening area of at most 1500 mm 2 .
  • liquid can flow out of the housing of the high-pressure cleaning device 10 via the outflow openings 126 and 128 before the liquid can come into contact with live parts.
  • the drain openings 126 and 128 are here dimensioned so small that virtually no cooling air can get into the housing of the high-pressure cleaner 10, but that to be put to the high-pressure cleaner 10 safety requirements are readily met.
  • the dimensioning of the entire opening area of the discharge openings 128 and 126 to a maximum of 3000 mm 2 , in particular to less than 1500 mm 2 ensures that the high-pressure cleaning device 10 despite the reliable guarantee of all safety requirements has a relatively low sound power level.
  • the sound power level of the high-pressure cleaner 10 is less than 78 dB (A), measured according to the standard EN 60704.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP13165580.5A 2008-11-14 2009-02-28 Appareil de nettoyage haute pression Active EP2620228B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008058724 2008-11-14
EP09776404.7A EP2346621B1 (fr) 2008-11-14 2009-02-28 Appareil de nettoyage sous haute pression

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP09776404.7A Division EP2346621B1 (fr) 2008-11-14 2009-02-28 Appareil de nettoyage sous haute pression
EP09776404.7 Division 2009-02-28

Publications (3)

Publication Number Publication Date
EP2620228A2 true EP2620228A2 (fr) 2013-07-31
EP2620228A3 EP2620228A3 (fr) 2014-08-20
EP2620228B1 EP2620228B1 (fr) 2017-05-31

Family

ID=40810544

Family Applications (2)

Application Number Title Priority Date Filing Date
EP13165580.5A Active EP2620228B1 (fr) 2008-11-14 2009-02-28 Appareil de nettoyage haute pression
EP09776404.7A Active EP2346621B1 (fr) 2008-11-14 2009-02-28 Appareil de nettoyage sous haute pression

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP09776404.7A Active EP2346621B1 (fr) 2008-11-14 2009-02-28 Appareil de nettoyage sous haute pression

Country Status (6)

Country Link
US (1) US8727748B2 (fr)
EP (2) EP2620228B1 (fr)
JP (2) JP5373103B2 (fr)
CN (1) CN102215986B (fr)
DK (2) DK2346621T3 (fr)
WO (1) WO2010054701A1 (fr)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102327878A (zh) * 2011-09-22 2012-01-25 上海亿力电器有限公司 一种低噪音高压清洗机
DK2771134T3 (en) * 2011-10-28 2016-06-06 Kaercher Gmbh & Co Kg Alfred Pressure Washer
CN104114293B (zh) * 2012-02-20 2016-08-24 阿尔弗雷德·凯驰两合公司 高压清洁设备
CN104114291B (zh) * 2012-02-20 2015-12-23 阿尔弗雷德·凯驰两合公司 高压清洁机
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EP2346621B1 (fr) 2013-05-01
EP2620228A3 (fr) 2014-08-20
CN102215986B (zh) 2014-10-22
JP2013166145A (ja) 2013-08-29
DK2346621T3 (da) 2013-07-15
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JP2012508644A (ja) 2012-04-12
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EP2346621A1 (fr) 2011-07-27
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