EP4217123A1 - Double function high pressure water jet cleaner - Google Patents

Double function high pressure water jet cleaner

Info

Publication number
EP4217123A1
EP4217123A1 EP21782821.9A EP21782821A EP4217123A1 EP 4217123 A1 EP4217123 A1 EP 4217123A1 EP 21782821 A EP21782821 A EP 21782821A EP 4217123 A1 EP4217123 A1 EP 4217123A1
Authority
EP
European Patent Office
Prior art keywords
pump
high pressure
water jet
pressure water
casing
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.)
Pending
Application number
EP21782821.9A
Other languages
German (de)
French (fr)
Inventor
Alessandro Casalgrandi
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.)
Annovi Reverberi SpA
Original Assignee
Annovi Reverberi SpA
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 Annovi Reverberi SpA filed Critical Annovi Reverberi SpA
Publication of EP4217123A1 publication Critical patent/EP4217123A1/en
Pending legal-status Critical Current

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
    • 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
    • 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
    • B08B2203/0258—Multiple lance high pressure cleaning station

Definitions

  • the present invention relates to a high pressure water jet cleaner, i.e., a high pressure washing device, for cleaning surfaces by generating a jet of liquid under pressure.
  • high pressure washing devices or high pressure water jet cleaners, generally comprise a pump, to which an electric motor is mechanically connected, for the purpose of supplying the pump with the mechanical energy required to pressurise a fluid, such as water, and send it to a delivery conduit.
  • a pump to which an electric motor is mechanically connected, for the purpose of supplying the pump with the mechanical energy required to pressurise a fluid, such as water, and send it to a delivery conduit.
  • This pressurised fluid is usually used to remove dirt from a surface and/or to rinse after washing with cleaning and/or sanitising liquids.
  • spraying machines also called sprayers, which use pumps or compressors connected to a suitable spray nozzle to spray cleaning and/or sanitising liquids from a tank, so as to evenly deposit droplets of liquid on the surface to be treated.
  • the cleaning/sanitising liquid act for a sufficient time, it must be removed, e.g., by rinsing with a high pressure water jet cleaner to ensure that no traces of the liquid remain on the surface.
  • the object of the present invention is to solve the drawbacks of the prior art, all within the framework of an efficient, rational and robust construction solution.
  • the invention particularly, makes available a high pressure water jet cleaner comprising:
  • a first pump associated with the casing which is provided with a suction conduit adapted to be connected to a water network and a delivery conduit, - a dispensing pistol provided with a dispensing nozzle and fluidly connected to the delivery conduit of the first pump,
  • a second pump associated with the casing which is provided with a suction conduit in direct fluid communication with a tank, adapted to contain a liquid, and independent from the suction conduit of the first pump, and a delivery conduit independent from the delivery conduit of the first pump,
  • a spray pistol provided with a spray nozzle and fluidly connected to the delivery conduit of the second pump.
  • the user can carry out washing operations quickly and easily, as he/she always has the proper tool at hand, just carrying one single tool, i.e., a single high pressure water jet cleaner, and therefore without having to connect or disconnect different machines to the water network and/or electricity grid.
  • the high pressure waterjet cleaner may comprise a first electric motor mechanically connected to the first pump to activate it, a second electric motor mechanically connected to the second pump to activate it, and an electric power supply device configured to selectively connect the first motor or the second motor to an electric energy source. It is thereby particularly quick and convenient to select the function to be used by the high pressure water jet cleaner, between the classic water jet cleaner function of dispensing pressurized liquid (water) and spraying a cleaning and/or sanitising liquid. In addition, this allows rationalisation of motor sizing, as only one motor is allowed to be switched on at a time.
  • the second pump may be configured to generate a maximum flow rate comprised between 0.1 L/min and 0.3 L/min and a maximum pressure comprised between 2 bars and 6 bars.
  • Spraying the liquid in the tank is thereby optimal.
  • the second pump may be a vibration pump.
  • the high pressure water jet cleaner thereby has a high service life, as vibration pumps require few gaskets at the moving pumping members thereof, for example only one gasket is needed, and they generate a low pressure, so the members stressed by corrosive liquids such as cleaning agents and disinfectants are few and relatively little stressed, and their possible replacement is quick and easy.
  • the components in contact with the fluid i.e., the surfaces defining the fluid passage sections, are defined by stainless steel bodies, with the exception of the surfaces defined by the gaskets.
  • vibration pumps Another advantage of vibration pumps is that the second motor can be an integral part of the vibration pump, which helps to make the high pressure water jet cleaner more compact.
  • the second motor may comprise a solenoid adapted to move a core of ferromagnetic material along an oscillation axis and the second pump comprises a pumping member slidably inserted into a pumping chamber and integral in sliding along the oscillation axis to the core of ferromagnetic material.
  • the invention may provide that the tank of the sanitising and/or cleaning liquid may be associated with the casing.
  • the high pressure water jet cleaner particularly easy to handle, as the tank of the liquid to be sprayed can also be transported by acting on the casing of the high pressure water jet cleaner, e.g., by grabbing a handle.
  • Another aspect of the invention provides that the tank can be removably associated with the casing.
  • the tank can thereby be easily transported with the casing of the high pressure water jet cleaner, and at the same time, cleaning and/or refilling the tank are made easier thanks to the possibility of detaching it from the casing.
  • this feature allows to quickly and easily replace and clean the tank, even temporarily, with a larger tank.
  • this last feature is assisted by the fact that a pipe connecting the suction conduit of the second pump with the tank can be removably associated with the tank, so that it can be detached from the tank and inserted into another tank, for example one with a larger capacity.
  • the casing may comprise a horizontal rectilinear guide adapted to guide the tank.
  • the high pressure water jet cleaner may comprise, i.e., the casing to which the first pump and the second pump are associated, a first support adapted to hold the dispensing pistol and a second support adapted to hold the spray pistol.
  • Figure 1 is a front view of the high pressure water jet cleaner according to the invention.
  • Figure 2 is a side view of the high pressure water jet cleaner of Figure 1 .
  • Figure 3 is a rear view of the high pressure water jet cleaner of the previous Figures.
  • Figure 4 is a rear view of the high pressure water jet cleaner in which a tank adapted to hold a cleaning and/or sanitising liquid has been removed.
  • Figure 5 is a schematic and partial illustration of the high pressure water jet cleaner according to the invention.
  • Figure 6 is a sectional view of a high pressure water jet cleaner vibration pump.
  • a high pressure water jet cleaner i.e., a high pressure washing device, has been indicated with 1 .
  • the high pressure waterjet cleaner 1 comprises a casing 10, for example made of plastic material, preferably provided with a handle 15, preferably made in a top portion of the casing, for grabbing the high pressure water jet cleaner by a user.
  • the casing 10 is rigid, i.e., not deformable under the normal forces acting thereon while using the high pressure water jet cleaner.
  • the plastic material used and the thicknesses of the casing are such that the casing is essentially rigid.
  • the high pressure water jet cleaner may comprise a pair of ground contact wheels 20 rotatably associated with the casing, for example positioned externally to the casing.
  • the high pressure water jet cleaner comprises a first pump 25 associated with, i.e., fixed to, the casing 10 and preferably contained, for example entirely contained, within the casing 10, i.e., within an internal cavity of the casing.
  • the first pump 25 is provided with a suction conduit 30 adapted to be connected to a source of fluid to be pressurised, such as a water supply network, and a delivery conduit
  • the first pump 25 is preferably configured to generate a maximum pressure of more than 60 bars.
  • the first pump 25 may be one of an axial piston inclined plate pump, a reciprocating pump, or a piston pump with an eccentric shaft.
  • the high pressure water jet cleaner may comprise an inlet coupling fitting 40 (see Figure 1 ), rigidly associated with the casing 10, accessible externally to the casing and in fluid connection with the suction conduit 30 of the first pump 25.
  • the inlet coupling fitting 40 is connected by means of a pipe (not shown and located inside the casing) to the suction conduit 30 and is adapted to be connected by means of a pipe provided with a coupling fitting complementary to the inlet coupling fitting 40 to the fluid source to be pressurised.
  • the inlet coupling fitting is, for example, of the quick connect-disconnect type, as known by the skilled in the art and therefore not described further.
  • the high pressure water jet cleaner 1 includes a dispensing pistol 45 fluidly connected to the delivery conduit 35 of the first pump, for example (directly) by means of a flexible pipe 50.
  • the high pressure water jet cleaner comprises a flexible pipe winding mechanism 50 provided with a roller 55 rotatably associated with the casing 10, for example at the handle 15.
  • the dispensing pistol 45 comprises a body provided with a handpiece and a dispensing lance 60 associated, for example removably, with the handpiece.
  • the lance is provided, at one free end thereof, with a dispensing nozzle 65.
  • the dispensing pistol may be associated with any other cleaning tool as an alternative to the lance, such as a rotary brush.
  • dispensing nozzle means a nozzle which is configured to withstand the pressures generated by the first pump and which is also configured to generate a compact, substantially rectilinear, jet of liquid.
  • Dispensing nozzles generally have a mechanism configured to vary the shape of the jet between rectangular and fan-shaped, for example by moving a pair of opposite walls of the mechanism closer to and away from each other.
  • the dispensing pistol 45 may comprise a trigger 70 movable between a first position, in which the dispensing pistol does not dispense pressurized fluid, for example through the lance, and a second position, in which the dispensing pistol dispenses pressurized fluid, for example through the lance.
  • the trigger 70 is located at the handpiece and activates a tap between a first position, in which it allows the flow of pressurised fluid from the delivery conduit 35 to the dispensing nozzle 65, and a second position, in which it stops the flow of pressurised fluid from the delivery conduit 35 to the dispensing nozzle 65.
  • the dispensing nozzle 65 is in fluid communication only with the delivery conduit 35 of the first pump.
  • the delivery conduit 35 is in turn connected at the outlet only with the dispensing nozzle 65, hence with the dispensing nozzle 45.
  • the fluid pressurised by the first pump is dispensed only via the dispensing nozzle 65 (passing through the dispensing pistol).
  • the high pressure water jet cleaner 1 comprises a first electric motor 75 configured to activate the first pump 25. That is, the first electric motor 75 is mechanically connected to the first pump 25 to activate it so as to pressurise the fluid coming from the suction conduit. Altogether, the first electric motor 75 and the first pump 25 form a first motor pump of the high pressure water jet cleaner.
  • the first electric motor may be, for example, only switched on or off, and when switched on, it activates the first pump at a pre-set activating speed to pressurise the fluid.
  • the first electric motor 75 is adapted to be electrically connected to an electric energy source E.
  • the electric energy source E may be an electric connection cable adapted to be connected to the electricity grid and/or a battery.
  • the high pressure water jet cleaner comprises a tank 80 adapted to hold a liquid, in particular a cleaning and/or sanitising liquid.
  • the tank 80 is preferably made of polymer material at least in the parts in contact with the liquid. In the embodiment shown, the tank 80 is entirely made of polymer material.
  • the tank 80 comprises a fill up opening made in an upper portion thereof, i.e., in a top portion thereof, and a cap 90 for closing the fill up opening and removably associated with the tank.
  • the tank 80 is associated with the casing 10, for example it is fixed to the casing 10, preferably removably.
  • the casing may comprise a recess 95 (see Figure 4 in which the tank is removed from the casing) adapted to at least partially contain the tank 80, so as to increase the overall compactness of the cleaner.
  • the tank comprises a portion adapted to be inserted into the recess and dimensioned in such a way as to deform plastically during insertion (or in such a way as to deform the recess) so as to realise a non-permanent inference connection with the casing.
  • the recess is of a form converging towards a bottom wall 100, preferably lying on a vertical plane, of the recess itself in such a way as to realise said interference connection.
  • the casing may comprise a guide configured to guide the fixing of the tank 80 to the casing, for example to guide the insertion of the tank into the recess 95.
  • the guide defines a substantially horizontal sliding axis, i.e., it guides the insertion of the tank into the recess 95 along a horizontal sliding axis.
  • the guide may define a substantially vertical sliding axis and the recess may be shaped to accommodate the tank along a vertical insertion and extraction direction.
  • the guide comprises at least one rectilinear relief 105, preferably a pair of rectilinear reliefs 105, made on walls of the recess opposite from each other and transverse to the bottom wall, projecting from a surface of the recess 95 in a direction approaching the centre of the recess.
  • the relief 105 i.e., the pair of reliefs 105, extends along a substantially horizontal longitudinal axis.
  • the guide is convergent, i.e., the longitudinal axes of the reliefs 105 are convergent, in particular towards the bottom wall 100.
  • the guide also includes a groove made in the tank and shaped to accommodate at least partially the relief so that it slides over it.
  • the guide comprises a pair of grooves made on opposite walls of the tank and positioned and shaped so as to slide over the reliefs 105.
  • the high pressure water jet cleaner 1 includes a second pump 1 10 associated, for example fixed without residual degrees of freedom, with the casing 10.
  • the second pump 1 10 is contained in a closed box-shaped crankcase 1 15, rigidly fixed without residual degrees of freedom, for example screwed or hooked, to the casing 10.
  • the second pump 1 10 is contained in the same casing 10 within which the first pump 25 is contained.
  • the second pump 1 10 is provided with a suction conduit 120, in fluid communication, for example by means of a suction pipe 130, with the tank 80 adapted to contain the clean- ing/sanitising liquid and independent, i.e., fluidly separated, from the suction conduit of the first pump. It is also evident that the suction conduit 120 is not in communication with the delivery conduit of the first pump.
  • the second pump 1 10 also comprises a discharge conduit 125, which is independent from the delivery conduit of the first pump.
  • the second pump is preferably configured to generate a maximum flow rate comprised between 0.1 L/min and 0.3 L/min and a maximum pressure comprised between 2 bars and 6 bars.
  • the second pump shown is configured to generate a maximum flow rate comprised between 0.1 L/min and 0.2 L/min and a maximum pressure comprised between 2 bars and 4 bars.
  • the second pump 110 is a vibration pump.
  • vibration pump 110 is activated by a second motor which is an integral part of the vibration pump itself.
  • the second pump comprises a box-shaped casing 170, for example made of steel, which is provided with a pumping chamber 175, defined within a cylinder, in fluid communication with the delivery conduit 125, by means of the interposition of a one-way delivery valve 180, and the suction conduit 120.
  • a box-shaped casing 170 for example made of steel, which is provided with a pumping chamber 175, defined within a cylinder, in fluid communication with the delivery conduit 125, by means of the interposition of a one-way delivery valve 180, and the suction conduit 120.
  • a pumping member is slidably inserted along a sliding axis X, which also acts as a one-way suction valve in selectively placing the pumping chamber 175 in communication with the suction conduit.
  • the pumping member comprises a piston 185, slidably inserted in the cylinder along the sliding axis X and provided with an axial cavity 186 crossing it along the direction of the sliding axis X from one axial end to the other, placing the suction conduit 120 in fluid communication with the pumping chamber 175.
  • the pumping member also comprises a spheroidal body 190 which is pushed by an elastic element 195 into a sealing seat for the spheroidal body itself made at an axial end of the piston 185 distal from the suction conduit, at the axial cavity 186.
  • the elastic element pushes the spheroidal body 190 towards said housing seat, e.g., in the direction away from the delivery valve, to occlude the axial cavity of the piston, thus acting as a suction valve.
  • the pump comprises an annular gasket 200, e.g., housed in a housing groove made in the cylinder in which the piston slides, which insists on an outer shell of the piston (i.e., a cylindrical side surface of the piston).
  • the annular gasket 200 acts as a fluid-dynamic sealing between the pumping chamber 175 and the suction conduit 120.
  • This gasket is preferably made of polymeric material.
  • this gasket is the only pump gasket in contact with the fluid to be pumped and with a moving body (the piston).
  • the spheroidal body When the piston 185 moves along the sliding axis X towards the delivery conduit, the spheroidal body is pressed into its housing seat and closes the axial cavity 186 and the fluid is pushed by the piston and spheroidal body assembly towards the delivery one-way valve which therefore opens thus allowing the fluid to flow towards the delivery conduit.
  • the elastic element is configured in such a way that the spheroidal body distances itself from its housing seat in the piston allowing fluid from the suction conduit to enter the pumping chamber through the axial cavity of the piston.
  • the second motor is contained in the box-shaped casing 170 comprising the pumping chamber 175.
  • the second motor comprises a solenoid 205 capable of moving a core 210, made of a ferromagnetic material, along an oscillation axis coaxial to the sliding axis X.
  • the solenoid is electrically powered in an alternating manner so as to generate a variable magnetic field such as to alternately move the core along the sliding axis between two end-of-stroke positions.
  • the core 210 has an axial cavity which passes through it from end to end in the direction of the sliding axis X and which is in fluid communication with the axial cavity of the piston, i.e., it is an extension of the latter in the core.
  • the core 210 is, for example, rigidly integral to the piston 185, and is contained in a chamber 215 interposed between the suction conduit 120 and the pumping chamber 175, i.e., the cylinder in which the pumping chamber is defined.
  • the sealing gasket 200 is interposed between the chamber 215 and the pumping chamber.
  • the second motor comprises a first spring 220 and a second spring 225 housed in the chamber 215 and acting on the core from opposite axial ends of the core 210 itself, each respectively generating a force along the direction of the axis of oscillation in the direction opposite to the force generated by the other spring.
  • the high pressure water jet cleaner downstream of the delivery conduit 125 the high pressure water jet cleaner comprises a by-pass valve (not shown), in fluid communication with the delivery conduit 125 and the tank 80 via a by-pass conduit 135, which valve is associated with a pressure gauge (not shown) capable of measuring the pressure in the delivery conduit and controlling the by-pass valve according to said pressure.
  • the valve is configured to be activated between a first position, in which it does not act on the flow downstream of the delivery conduit 125, and a second position, in which it diverts the outgoing flow from the delivery conduit to the tank 80 via the by-pass conduit 135.
  • the valve switches from the first position to the second position when the pressure gauge detects a pressure above a pre-set threshold value.
  • the pressure gauge can be either electronic or mechanical-hydraulic.
  • the high pressure water jet cleaner 1 comprises a spray pistol 140 fluidly connected to the delivery conduit 125 of the second pump, for example (directly) by means of a flexible pipe 145.
  • the spray pistol 140 comprises a body provided with a handpiece and a spray lance 150 associated, for example removably, with the handpiece.
  • the lance is provided with a spray nozzle 155 at one free end thereof.
  • a spray nozzle is a nozzle configured to generate a conical, or possibly spiral, jet of fluid (diverging from an outlet hole in a direction moving away from the nozzle).
  • nozzles comprise therein a plurality of liquid guide surfaces from the second pump configured to direct the fluid along a direction tilted with respect to a central axis of the nozzle outlet hole.
  • the spray pistol 140 may comprise a trigger 160 movable between a first position, wherein the spray pistol does not spray the fluid pressurized by the second pump, for example through the lance 150, and a second position, wherein the spray pistol does spray the fluid pressurized by the second pump.
  • the trigger 160 is located at the handpiece and activates a tap between a first position, in which it allows the flow of pressurised fluid from the delivery conduit 125 to the spray nozzle 155, and a second position, in which it stops the flow of pressurised fluid from the delivery conduit 125 to the spray nozzle 155.
  • the spray nozzle 155 and therefore the spray pistol 140, is in fluid communication only with the delivery conduit 125 of the second pump. It is therefore not in fluid communication with the delivery conduit of the first pump. Similarly, the delivery nozzle is not in fluid communication with the delivery conduit of the second pump. In practice, the fluid pressurised by the second pump is sprayed only via the spray nozzle 155 (passing through the spray pistol).
  • the second pump is of the vibration type and has therein the second motor as an integral part thereof, however, it cannot be excluded that in an embodiment not shown, the second pump may be of a different type, provided that it is configured to generate a maximum flow rate comprised between 0.1 L/min and 0.3 L/min and a maximum pressure comprised between 2 bars and 6 bars.
  • the high pressure water jet cleaner 1 may include a second electric motor configured to activate the second pump. That is, the second electric motor is mechanically connected to the second pump to activate it in such a way as to pressurise the fluid coming from tank 80.
  • the high-pressure waterjet cleaner comprises an electric supply device, e.g., of the manual type, configured to selectively connect the first motor or the second motor to an electric energy source.
  • an electric supply device e.g., of the manual type, configured to selectively connect the first motor or the second motor to an electric energy source.
  • the electric supply device can be activated in three positions, a first position in which the first electric motor and the second electric motor are both switched off, a second position in which only the first electric motor is switched on and the second electric motor 60 is switched off, and a third position in which the first electric motor is switched off and only the second electric motor is switched on.
  • the electric supply device can only be activated in said three positions.
  • “manual type” means that it can be activated manually, preferably only manually activated by an operator.
  • the first electric motor and the second electric motor are electrically connected to the electric energy source by means of the interposition of the electric supply device.
  • the electric supply device comprises, i.e., consists of, a switch 230 configured to be permanently positioned in the three positions described above.
  • Said switch 230 comprises a selection body which can be contacted directly by the user, for example a knob, for selecting the positions.
  • the high pressure water jet cleaner comprises a pressure limiting device (not shown) adapted to detect the pressure at the delivery conduit of the first pump and configured to interrupt the electric supply of the first motor when it detects a pressure, in the delivery conduit and/or in the pipe connecting to the dispensing pistol, greater than a predetermined threshold value.
  • the pressure limiting device may comprise a switch placed on an electric connection cable connecting the electric supply device to the first electric motor.
  • the high pressure water jet cleaner may also comprise a first support 235, adapted to hold the dispensing lance, and a second support 240, adapted to hold the spray lance, both rigidly attached to the casing 10.
  • a first support 235 adapted to hold the dispensing lance
  • a second support 240 adapted to hold the spray lance, both rigidly attached to the casing 10.
  • it is the casing itself that makes the first support and the second support available, i.e., they are integral with the casing or parts thereof.
  • Each support comprises a flange which protrudes externally from an outer surface of the casing from which the flange derives and a grasping portion which retains the respective pistol, i.e., lance, and is associated with the end of the flange opposite to that in contact with the outer surface of the casing.
  • each grasping portion is shaped as a tubular portion, e.g., oriented with a central axis transverse to a horizontal plane, into which the lance of the respective pistol is inserted.
  • an inner surface of the tubular portion, which contacts the pistol lance is conical in shape with a cross-sectional area that gradually decreases from top to bottom.
  • the operation of the high pressure water jet cleaner according to the invention is as follows.
  • the user can set the supply device to the second position to activate the first pump and use the dispensing pistol to sweep away the cleaning agent and dirt with the pressurised fluid.
  • the user can place the pistols in their respective supports 234, 240 and conveniently transport everything together, including the tank 80, for example by simply gripping the handle 15.

Landscapes

  • Cleaning By Liquid Or Steam (AREA)

Abstract

A high pressure water jet cleaner (1) is described as comprising: a casing (10), a first pump (25) associated with the casing (10), which is provided with a suction conduit (30) adapted to be connected to a water network and a delivery conduit (35), a dispensing pistol (45) provided with a dispensing nozzle (65) and fluidly connected with the delivery conduit (35) of the first pump (25), a second pump (110) associated with the casing (10), which is provided with a suction conduit (120) in direct fluid communication with a tank (80), adapted to contain a liquid, and independent from the suction conduit (30) of the first pump (25), and with a delivery conduit (125) independent from the delivery conduit (35) of the first pump (25), and a spray pistol (140) provided with a spray nozzle and fluidly connected to the delivery conduit of the second pump.

Description

DOUBLE FUNCTION HIGH PRESSURE WATER JET CLEANER
TECHNICAL FIELD
The present invention relates to a high pressure water jet cleaner, i.e., a high pressure washing device, for cleaning surfaces by generating a jet of liquid under pressure.
PRIOR ART
As known, high pressure washing devices, or high pressure water jet cleaners, generally comprise a pump, to which an electric motor is mechanically connected, for the purpose of supplying the pump with the mechanical energy required to pressurise a fluid, such as water, and send it to a delivery conduit.
This pressurised fluid is usually used to remove dirt from a surface and/or to rinse after washing with cleaning and/or sanitising liquids.
In particular, in order to wash a surface with cleaning and/or sanitising liquids, it is possible to use spraying machines, also called sprayers, which use pumps or compressors connected to a suitable spray nozzle to spray cleaning and/or sanitising liquids from a tank, so as to evenly deposit droplets of liquid on the surface to be treated.
Generally, after letting the cleaning/sanitising liquid act for a sufficient time, it must be removed, e.g., by rinsing with a high pressure water jet cleaner to ensure that no traces of the liquid remain on the surface.
One drawback encountered by an operator in charge of cleaning is that he/she has to carry both a high pressure water jet cleaner and a sprayer/atomiser. [The advantage is that the device does not have to be connected to/disconnected from the network every time]
The object of the present invention is to solve the drawbacks of the prior art, all within the framework of an efficient, rational and robust construction solution.
Such object is achieved by the features of the invention reported in the independent claim. The dependent claims outline preferred and/or particularly advantageous aspects of the invention.
DISCLOSURE OF THE INVENTION
The invention, particularly, makes available a high pressure water jet cleaner comprising:
- a casing,
- a first pump associated with the casing, which is provided with a suction conduit adapted to be connected to a water network and a delivery conduit, - a dispensing pistol provided with a dispensing nozzle and fluidly connected to the delivery conduit of the first pump,
- a second pump associated with the casing, which is provided with a suction conduit in direct fluid communication with a tank, adapted to contain a liquid, and independent from the suction conduit of the first pump, and a delivery conduit independent from the delivery conduit of the first pump,
- a spray pistol provided with a spray nozzle and fluidly connected to the delivery conduit of the second pump.
Thanks to this solution, the user can carry out washing operations quickly and easily, as he/she always has the proper tool at hand, just carrying one single tool, i.e., a single high pressure water jet cleaner, and therefore without having to connect or disconnect different machines to the water network and/or electricity grid.
According to an aspect of the invention, the high pressure waterjet cleaner may comprise a first electric motor mechanically connected to the first pump to activate it, a second electric motor mechanically connected to the second pump to activate it, and an electric power supply device configured to selectively connect the first motor or the second motor to an electric energy source. It is thereby particularly quick and convenient to select the function to be used by the high pressure water jet cleaner, between the classic water jet cleaner function of dispensing pressurized liquid (water) and spraying a cleaning and/or sanitising liquid. In addition, this allows rationalisation of motor sizing, as only one motor is allowed to be switched on at a time.
According to another aspect of the invention, the second pump may be configured to generate a maximum flow rate comprised between 0.1 L/min and 0.3 L/min and a maximum pressure comprised between 2 bars and 6 bars.
Spraying the liquid in the tank is thereby optimal.
According to yet another aspect of the invention, the second pump may be a vibration pump.
The high pressure water jet cleaner thereby has a high service life, as vibration pumps require few gaskets at the moving pumping members thereof, for example only one gasket is needed, and they generate a low pressure, so the members stressed by corrosive liquids such as cleaning agents and disinfectants are few and relatively little stressed, and their possible replacement is quick and easy. In detail, the components in contact with the fluid, i.e., the surfaces defining the fluid passage sections, are defined by stainless steel bodies, with the exception of the surfaces defined by the gaskets.
Another advantage of vibration pumps is that the second motor can be an integral part of the vibration pump, which helps to make the high pressure water jet cleaner more compact.
In further detail, the second motor may comprise a solenoid adapted to move a core of ferromagnetic material along an oscillation axis and the second pump comprises a pumping member slidably inserted into a pumping chamber and integral in sliding along the oscillation axis to the core of ferromagnetic material.
The invention may provide that the tank of the sanitising and/or cleaning liquid may be associated with the casing.
This makes the high pressure water jet cleaner particularly easy to handle, as the tank of the liquid to be sprayed can also be transported by acting on the casing of the high pressure water jet cleaner, e.g., by grabbing a handle.
Another aspect of the invention provides that the tank can be removably associated with the casing.
The tank can thereby be easily transported with the casing of the high pressure water jet cleaner, and at the same time, cleaning and/or refilling the tank are made easier thanks to the possibility of detaching it from the casing.
In addition, this feature allows to quickly and easily replace and clean the tank, even temporarily, with a larger tank. In particular, this last feature is assisted by the fact that a pipe connecting the suction conduit of the second pump with the tank can be removably associated with the tank, so that it can be detached from the tank and inserted into another tank, for example one with a larger capacity.
Still another aspect of the invention is that the casing may comprise a horizontal rectilinear guide adapted to guide the tank.
This feature makes it even easier and faster to remove the tank from the casing, furthermore, the solution is particularly robust as, guiding the fixing of the tank reduces the likelihood of damaging the tank due to a wrong positioning while inserting it into a housing seat of the tank.
In order to further improve the handiness of the high pressure water jet cleaner, the high pressure water jet cleaner may comprise, i.e., the casing to which the first pump and the second pump are associated, a first support adapted to hold the dispensing pistol and a second support adapted to hold the spray pistol.
BRIEF DESCRIPTION OF THE DRAWINGS
Further features and advantages of the invention will be more apparent after reading the following description provided by way of non-limiting example, with the aid of the accompanying drawings.
Figure 1 is a front view of the high pressure water jet cleaner according to the invention.
Figure 2 is a side view of the high pressure water jet cleaner of Figure 1 .
Figure 3 is a rear view of the high pressure water jet cleaner of the previous Figures.
Figure 4 is a rear view of the high pressure water jet cleaner in which a tank adapted to hold a cleaning and/or sanitising liquid has been removed.
Figure 5 is a schematic and partial illustration of the high pressure water jet cleaner according to the invention.
Figure 6 is a sectional view of a high pressure water jet cleaner vibration pump.
DETAILED DESCRIPTION
With particular reference to these figures, a high pressure water jet cleaner, i.e., a high pressure washing device, has been indicated with 1 .
The high pressure waterjet cleaner 1 comprises a casing 10, for example made of plastic material, preferably provided with a handle 15, preferably made in a top portion of the casing, for grabbing the high pressure water jet cleaner by a user.
The casing 10 is rigid, i.e., not deformable under the normal forces acting thereon while using the high pressure water jet cleaner. In practice, the plastic material used and the thicknesses of the casing are such that the casing is essentially rigid.
In order to handle the high pressure water jet cleaner, in addition to the handle, the high pressure water jet cleaner may comprise a pair of ground contact wheels 20 rotatably associated with the casing, for example positioned externally to the casing.
With particular reference to Figure 5, the high pressure water jet cleaner comprises a first pump 25 associated with, i.e., fixed to, the casing 10 and preferably contained, for example entirely contained, within the casing 10, i.e., within an internal cavity of the casing.
The first pump 25 is provided with a suction conduit 30 adapted to be connected to a source of fluid to be pressurised, such as a water supply network, and a delivery conduit The first pump 25 is preferably configured to generate a maximum pressure of more than 60 bars.
The first pump 25 may be one of an axial piston inclined plate pump, a reciprocating pump, or a piston pump with an eccentric shaft.
The high pressure water jet cleaner may comprise an inlet coupling fitting 40 (see Figure 1 ), rigidly associated with the casing 10, accessible externally to the casing and in fluid connection with the suction conduit 30 of the first pump 25. Substantially, the inlet coupling fitting 40 is connected by means of a pipe (not shown and located inside the casing) to the suction conduit 30 and is adapted to be connected by means of a pipe provided with a coupling fitting complementary to the inlet coupling fitting 40 to the fluid source to be pressurised.
The inlet coupling fitting is, for example, of the quick connect-disconnect type, as known by the skilled in the art and therefore not described further.
The high pressure water jet cleaner 1 includes a dispensing pistol 45 fluidly connected to the delivery conduit 35 of the first pump, for example (directly) by means of a flexible pipe 50. In the embodiment shown, the high pressure water jet cleaner comprises a flexible pipe winding mechanism 50 provided with a roller 55 rotatably associated with the casing 10, for example at the handle 15.
The dispensing pistol 45 comprises a body provided with a handpiece and a dispensing lance 60 associated, for example removably, with the handpiece. The lance is provided, at one free end thereof, with a dispensing nozzle 65. The dispensing pistol may be associated with any other cleaning tool as an alternative to the lance, such as a rotary brush. It must be specified that dispensing nozzle means a nozzle which is configured to withstand the pressures generated by the first pump and which is also configured to generate a compact, substantially rectilinear, jet of liquid. Dispensing nozzles generally have a mechanism configured to vary the shape of the jet between rectangular and fan-shaped, for example by moving a pair of opposite walls of the mechanism closer to and away from each other.
The dispensing pistol 45 may comprise a trigger 70 movable between a first position, in which the dispensing pistol does not dispense pressurized fluid, for example through the lance, and a second position, in which the dispensing pistol dispenses pressurized fluid, for example through the lance. In particular, the trigger 70 is located at the handpiece and activates a tap between a first position, in which it allows the flow of pressurised fluid from the delivery conduit 35 to the dispensing nozzle 65, and a second position, in which it stops the flow of pressurised fluid from the delivery conduit 35 to the dispensing nozzle 65.
The dispensing nozzle 65, hence the dispensing pistol 45, is in fluid communication only with the delivery conduit 35 of the first pump. The delivery conduit 35 is in turn connected at the outlet only with the dispensing nozzle 65, hence with the dispensing nozzle 45. In practice, the fluid pressurised by the first pump is dispensed only via the dispensing nozzle 65 (passing through the dispensing pistol).
With particular reference to the diagram in Figure 5, the high pressure water jet cleaner 1 comprises a first electric motor 75 configured to activate the first pump 25. That is, the first electric motor 75 is mechanically connected to the first pump 25 to activate it so as to pressurise the fluid coming from the suction conduit. Altogether, the first electric motor 75 and the first pump 25 form a first motor pump of the high pressure water jet cleaner. The first electric motor may be, for example, only switched on or off, and when switched on, it activates the first pump at a pre-set activating speed to pressurise the fluid.
The first electric motor 75 is adapted to be electrically connected to an electric energy source E. The electric energy source E may be an electric connection cable adapted to be connected to the electricity grid and/or a battery.
In particular, the first electric motor 75 may only be activated between a first condition, in which it is switched on, i.e. in which it is electrically powered by the source of electric energy, and a second condition, in which it is switched off, i.e. in which it is not electrically powered by the source of electric energy and no electric current flows in the first motor. The high pressure water jet cleaner comprises a tank 80 adapted to hold a liquid, in particular a cleaning and/or sanitising liquid. The tank 80 is preferably made of polymer material at least in the parts in contact with the liquid. In the embodiment shown, the tank 80 is entirely made of polymer material.
The tank 80 comprises a fill up opening made in an upper portion thereof, i.e., in a top portion thereof, and a cap 90 for closing the fill up opening and removably associated with the tank.
The tank 80 is associated with the casing 10, for example it is fixed to the casing 10, preferably removably. For example, the casing may comprise a recess 95 (see Figure 4 in which the tank is removed from the casing) adapted to at least partially contain the tank 80, so as to increase the overall compactness of the cleaner.
In particular, the tank comprises a portion adapted to be inserted into the recess and dimensioned in such a way as to deform plastically during insertion (or in such a way as to deform the recess) so as to realise a non-permanent inference connection with the casing. For example, the recess is of a form converging towards a bottom wall 100, preferably lying on a vertical plane, of the recess itself in such a way as to realise said interference connection.
The casing may comprise a guide configured to guide the fixing of the tank 80 to the casing, for example to guide the insertion of the tank into the recess 95.
Preferably the guide defines a substantially horizontal sliding axis, i.e., it guides the insertion of the tank into the recess 95 along a horizontal sliding axis. However, it is not excluded that in an alternative embodiment not shown, the guide may define a substantially vertical sliding axis and the recess may be shaped to accommodate the tank along a vertical insertion and extraction direction.
In the embodiment shown, the guide comprises at least one rectilinear relief 105, preferably a pair of rectilinear reliefs 105, made on walls of the recess opposite from each other and transverse to the bottom wall, projecting from a surface of the recess 95 in a direction approaching the centre of the recess. In detail, the relief 105, i.e., the pair of reliefs 105, extends along a substantially horizontal longitudinal axis.
In the embodiment shown, the guide is convergent, i.e., the longitudinal axes of the reliefs 105 are convergent, in particular towards the bottom wall 100.
The guide also includes a groove made in the tank and shaped to accommodate at least partially the relief so that it slides over it. For example, the guide comprises a pair of grooves made on opposite walls of the tank and positioned and shaped so as to slide over the reliefs 105.
The high pressure water jet cleaner 1 includes a second pump 1 10 associated, for example fixed without residual degrees of freedom, with the casing 10.
In the embodiment shown, the second pump 1 10 is contained in a closed box-shaped crankcase 1 15, rigidly fixed without residual degrees of freedom, for example screwed or hooked, to the casing 10. However, in an embodiment not shown, the second pump 1 10 is contained in the same casing 10 within which the first pump 25 is contained.
The second pump 1 10 is provided with a suction conduit 120, in fluid communication, for example by means of a suction pipe 130, with the tank 80 adapted to contain the clean- ing/sanitising liquid and independent, i.e., fluidly separated, from the suction conduit of the first pump. It is also evident that the suction conduit 120 is not in communication with the delivery conduit of the first pump.
The second pump 1 10 also comprises a discharge conduit 125, which is independent from the delivery conduit of the first pump.
The second pump is preferably configured to generate a maximum flow rate comprised between 0.1 L/min and 0.3 L/min and a maximum pressure comprised between 2 bars and 6 bars. In particular, the second pump shown is configured to generate a maximum flow rate comprised between 0.1 L/min and 0.2 L/min and a maximum pressure comprised between 2 bars and 4 bars.
For example, the second pump 110 is a vibration pump.
Therefore, such vibration pump 110 is activated by a second motor which is an integral part of the vibration pump itself.
In particular, the second pump comprises a box-shaped casing 170, for example made of steel, which is provided with a pumping chamber 175, defined within a cylinder, in fluid communication with the delivery conduit 125, by means of the interposition of a one-way delivery valve 180, and the suction conduit 120.
In the pumping chamber 175, a pumping member is slidably inserted along a sliding axis X, which also acts as a one-way suction valve in selectively placing the pumping chamber 175 in communication with the suction conduit.
In particular, the pumping member comprises a piston 185, slidably inserted in the cylinder along the sliding axis X and provided with an axial cavity 186 crossing it along the direction of the sliding axis X from one axial end to the other, placing the suction conduit 120 in fluid communication with the pumping chamber 175.
The pumping member also comprises a spheroidal body 190 which is pushed by an elastic element 195 into a sealing seat for the spheroidal body itself made at an axial end of the piston 185 distal from the suction conduit, at the axial cavity 186. The elastic element pushes the spheroidal body 190 towards said housing seat, e.g., in the direction away from the delivery valve, to occlude the axial cavity of the piston, thus acting as a suction valve.
The pump comprises an annular gasket 200, e.g., housed in a housing groove made in the cylinder in which the piston slides, which insists on an outer shell of the piston (i.e., a cylindrical side surface of the piston).
The annular gasket 200 acts as a fluid-dynamic sealing between the pumping chamber 175 and the suction conduit 120.
This gasket is preferably made of polymeric material.
Furthermore, this gasket is the only pump gasket in contact with the fluid to be pumped and with a moving body (the piston).
When the piston 185 moves along the sliding axis X towards the delivery conduit, the spheroidal body is pressed into its housing seat and closes the axial cavity 186 and the fluid is pushed by the piston and spheroidal body assembly towards the delivery one-way valve which therefore opens thus allowing the fluid to flow towards the delivery conduit.
When the piston 185 moves along the sliding axis X towards the delivery conduit, the elastic element is configured in such a way that the spheroidal body distances itself from its housing seat in the piston allowing fluid from the suction conduit to enter the pumping chamber through the axial cavity of the piston.
In the case herein described of the vibration pump, the second motor is contained in the box-shaped casing 170 comprising the pumping chamber 175.
In particular, the second motor comprises a solenoid 205 capable of moving a core 210, made of a ferromagnetic material, along an oscillation axis coaxial to the sliding axis X. The solenoid is electrically powered in an alternating manner so as to generate a variable magnetic field such as to alternately move the core along the sliding axis between two end-of-stroke positions.
The core 210 has an axial cavity which passes through it from end to end in the direction of the sliding axis X and which is in fluid communication with the axial cavity of the piston, i.e., it is an extension of the latter in the core.
The core 210 is, for example, rigidly integral to the piston 185, and is contained in a chamber 215 interposed between the suction conduit 120 and the pumping chamber 175, i.e., the cylinder in which the pumping chamber is defined. In detail, the sealing gasket 200 is interposed between the chamber 215 and the pumping chamber.
The second motor comprises a first spring 220 and a second spring 225 housed in the chamber 215 and acting on the core from opposite axial ends of the core 210 itself, each respectively generating a force along the direction of the axis of oscillation in the direction opposite to the force generated by the other spring.
In the embodiment shown, downstream of the delivery conduit 125 the high pressure water jet cleaner comprises a by-pass valve (not shown), in fluid communication with the delivery conduit 125 and the tank 80 via a by-pass conduit 135, which valve is associated with a pressure gauge (not shown) capable of measuring the pressure in the delivery conduit and controlling the by-pass valve according to said pressure. In particular, the valve is configured to be activated between a first position, in which it does not act on the flow downstream of the delivery conduit 125, and a second position, in which it diverts the outgoing flow from the delivery conduit to the tank 80 via the by-pass conduit 135.
The valve switches from the first position to the second position when the pressure gauge detects a pressure above a pre-set threshold value. The pressure gauge can be either electronic or mechanical-hydraulic.
The high pressure water jet cleaner 1 comprises a spray pistol 140 fluidly connected to the delivery conduit 125 of the second pump, for example (directly) by means of a flexible pipe 145.
The spray pistol 140 comprises a body provided with a handpiece and a spray lance 150 associated, for example removably, with the handpiece.
The lance is provided with a spray nozzle 155 at one free end thereof.
It must be specified that a spray nozzle is a nozzle configured to generate a conical, or possibly spiral, jet of fluid (diverging from an outlet hole in a direction moving away from the nozzle). Generally, such nozzles comprise therein a plurality of liquid guide surfaces from the second pump configured to direct the fluid along a direction tilted with respect to a central axis of the nozzle outlet hole.
The spray pistol 140 may comprise a trigger 160 movable between a first position, wherein the spray pistol does not spray the fluid pressurized by the second pump, for example through the lance 150, and a second position, wherein the spray pistol does spray the fluid pressurized by the second pump. In particular, the trigger 160 is located at the handpiece and activates a tap between a first position, in which it allows the flow of pressurised fluid from the delivery conduit 125 to the spray nozzle 155, and a second position, in which it stops the flow of pressurised fluid from the delivery conduit 125 to the spray nozzle 155.
The spray nozzle 155, and therefore the spray pistol 140, is in fluid communication only with the delivery conduit 125 of the second pump. It is therefore not in fluid communication with the delivery conduit of the first pump. Similarly, the delivery nozzle is not in fluid communication with the delivery conduit of the second pump. In practice, the fluid pressurised by the second pump is sprayed only via the spray nozzle 155 (passing through the spray pistol).
In the embodiment shown, the second pump is of the vibration type and has therein the second motor as an integral part thereof, however, it cannot be excluded that in an embodiment not shown, the second pump may be of a different type, provided that it is configured to generate a maximum flow rate comprised between 0.1 L/min and 0.3 L/min and a maximum pressure comprised between 2 bars and 6 bars. In this case, the high pressure water jet cleaner 1 may include a second electric motor configured to activate the second pump. That is, the second electric motor is mechanically connected to the second pump to activate it in such a way as to pressurise the fluid coming from tank 80.
The high-pressure waterjet cleaner comprises an electric supply device, e.g., of the manual type, configured to selectively connect the first motor or the second motor to an electric energy source.
In particular, the electric supply device can be activated in three positions, a first position in which the first electric motor and the second electric motor are both switched off, a second position in which only the first electric motor is switched on and the second electric motor 60 is switched off, and a third position in which the first electric motor is switched off and only the second electric motor is switched on.
For example, the electric supply device can only be activated in said three positions.
It should be noted that “manual type” means that it can be activated manually, preferably only manually activated by an operator.
The first electric motor and the second electric motor are electrically connected to the electric energy source by means of the interposition of the electric supply device.
In the embodiment shown, the electric supply device comprises, i.e., consists of, a switch 230 configured to be permanently positioned in the three positions described above. Said switch 230 comprises a selection body which can be contacted directly by the user, for example a knob, for selecting the positions. The high pressure water jet cleaner comprises a pressure limiting device (not shown) adapted to detect the pressure at the delivery conduit of the first pump and configured to interrupt the electric supply of the first motor when it detects a pressure, in the delivery conduit and/or in the pipe connecting to the dispensing pistol, greater than a predetermined threshold value.
For example, the pressure limiting device may comprise a switch placed on an electric connection cable connecting the electric supply device to the first electric motor.
Finally, the high pressure water jet cleaner may also comprise a first support 235, adapted to hold the dispensing lance, and a second support 240, adapted to hold the spray lance, both rigidly attached to the casing 10. For example, it is the casing itself that makes the first support and the second support available, i.e., they are integral with the casing or parts thereof.
Each support comprises a flange which protrudes externally from an outer surface of the casing from which the flange derives and a grasping portion which retains the respective pistol, i.e., lance, and is associated with the end of the flange opposite to that in contact with the outer surface of the casing.
In the embodiment shown, each grasping portion is shaped as a tubular portion, e.g., oriented with a central axis transverse to a horizontal plane, into which the lance of the respective pistol is inserted. For example, an inner surface of the tubular portion, which contacts the pistol lance, is conical in shape with a cross-sectional area that gradually decreases from top to bottom.
The operation of the high pressure water jet cleaner according to the invention is as follows.
When the user has to clean and/or sanitise a surface with suitable products, he can act on the supply device and take it to the third position to activate the second pump and spray the liquid contained in tank 80 by means of the spray pistol.
After letting the cleaning and/or sanitising agent act for a sufficient time, the user can set the supply device to the second position to activate the first pump and use the dispensing pistol to sweep away the cleaning agent and dirt with the pressurised fluid.
When there is no more cleaning and/or sanitising liquid left, it is sufficient to remove the cap 90 to refill the tank and in the event that the cleaning and/or the sanitising liquid needs to be changed and all the liquid already in the tank needs to be removed or the tank needs to be washed, it is possible to remove the tank from the casing, e.g. by pulling it out horizontally, and remove the pipe(s), preferably connected by means of removable connections, connecting to the second pump.
When the job is complete, the user can place the pistols in their respective supports 234, 240 and conveniently transport everything together, including the tank 80, for example by simply gripping the handle 15.
The invention thus conceived is susceptible to several modifications and variations, all falling within the scope of the inventive concept.
Moreover, all the details can be replaced by other technically equivalent elements. In practice, the materials used, as well as the contingent shapes and sizes, can be whatever according to the requirements without for this reason departing from the scope of protection of the following claims.

Claims

1. A high pressure water jet cleaner (1 ) comprising:
- - a casing (10),
- a first pump (25) associated with the casing (10), which is provided with a suction conduit (30) adapted to be connected to a water network and a delivery conduit (35),
- a dispensing pistol (45) provided with a dispensing nozzle (65) and fluidly connected to the delivery conduit (35) of the first pump (25),
- a second pump (1 10) associated with the casing (10), which is provided with a suction conduit (120) in direct fluid communication with a tank (80), adapted to contain a liquid, and independent from the suction conduit (30) of the first pump (25), and a delivery conduit (125) independent from the delivery conduit (35) of the first pump (25), and
- a spray pistol (140) provided with a spray nozzle and fluidly connected to the delivery conduit of the second pump.
2. The high pressure water jet cleaner (1 ) according to claim (1 ), comprising a first electric motor (75) mechanically connected to the first pump (25) for activating it, a second electric motor (205,210) mechanically connected to the second pump (1 10) for activating it and an electric supply device (230) configured to selectively connect to a source of electric energy the first motor (75) or the second motor (205,210).
3. The high pressure water jet cleaner (1 ) according to any one of the previous claims, wherein the second pump (1 10) is configured to generate a maximum flow rate comprised between 0.1 L/min and 0.3 L/min and a maximum pressure comprised between 2 bar and 6 bar.
4. The high pressure water jet cleaner (1 ) according to any one of the previous claims, wherein the second pump (110) is a vibration pump.
5. The high pressure water jet cleaner (1 ) according to claim 4, wherein the second motor is an integral part of the vibration pump.
6. The high pressure water jet cleaner (1 ) according to claim 5, wherein the second motor comprises a solenoid (205) adapted to move a core (210) made of ferromagnetic material along an oscillation axis and the second pump comprises a pumping member (195,200) slidably inserted into a pumping chamber (175) and integral in sliding along the oscillation axis to the core made of ferromagnetic material.
7. The high pressure water jet cleaner (1 ) according to any one of the previous claims, wherein the tank (80) is associated with the casing (10).
8. The high pressure water jet cleaner (1 ) according to claim 7, wherein the tank (80) is removably associated with the casing (10).
9. The high pressure water jet cleaner (1 ) according to claim 8, wherein the casing (10) comprises a horizontal rectilinear guide (105) adapted to guide the tank (80).
10. The high pressure water jet cleaner (1 ) according to claim 1 , wherein the tank (10) comprises a first support (235) adapted to retain the dispensing pistol and a second sup- port (240) adapted to retain the spray pistol.
EP21782821.9A 2020-09-24 2021-09-17 Double function high pressure water jet cleaner Pending EP4217123A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT202000022534 2020-09-24
PCT/IB2021/058483 WO2022064333A1 (en) 2020-09-24 2021-09-17 Double function high pressure water jet cleaner

Publications (1)

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EP4217123A1 true EP4217123A1 (en) 2023-08-02

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Application Number Title Priority Date Filing Date
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CN (1) CN116209529A (en)
WO (1) WO2022064333A1 (en)

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IT1267260B1 (en) * 1994-06-24 1997-01-28 Vetrella Spa MULTIFUNCTIONAL CLEANING APPARATUS
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CA3019926C (en) * 2016-04-20 2020-09-29 Karcher North America, Inc. Electric pressure washer
WO2019057276A1 (en) * 2017-09-20 2019-03-28 Alfred Kärcher SE & Co. KG High-pressure cleaning device

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WO2022064333A1 (en) 2022-03-31

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