EP3320989B1 - A water cleaner machine - Google Patents

A water cleaner machine Download PDF

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Publication number
EP3320989B1
EP3320989B1 EP17196481.0A EP17196481A EP3320989B1 EP 3320989 B1 EP3320989 B1 EP 3320989B1 EP 17196481 A EP17196481 A EP 17196481A EP 3320989 B1 EP3320989 B1 EP 3320989B1
Authority
EP
European Patent Office
Prior art keywords
pressure
motors
switch
pumps
pump
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.)
Active
Application number
EP17196481.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3320989A1 (en
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
Priority to PL17196481T priority Critical patent/PL3320989T3/pl
Publication of EP3320989A1 publication Critical patent/EP3320989A1/en
Application granted granted Critical
Publication of EP3320989B1 publication Critical patent/EP3320989B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • 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
    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/06—Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
    • B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
    • B08B2203/0223—Electric motor pumps
    • 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

Definitions

  • the present invention relates to high-pressure water cleaner machines, comprising at least two electric pumps activated by two electric motors, which is placed in communication with a water supply source and supplies a hand-manoeuvred high-pressure dispensing lance.
  • Chinese utility model CN 204672602 and US3481544 disclose high-pressure water cleaner machines having a plurality of operating modes.
  • the machines comprise a main pump activated by a main electric motor, and an auxiliary pump activated by an auxiliary electric motor, placed in parallel with the main pump.
  • the main pump and the auxiliary pump are supplied by a single water source via a three-way connector.
  • the outlet conduits of the main and auxiliary pumps both flow, by means of a three-way connector, into a supply conduit of a high-pressure lance.
  • the main pump has a maximum pressure value which is greater than the maximum pressure value of the auxiliary pump.
  • Each of the two pumps is activated by an independent electric motor; the two electric motors have a different power, proportional to the maximum dispensing pressure of the relative pump.
  • the command circuit of the water cleaner machine comprises a single main switch that is hand-operated, and a selector-switch, also hand-operated, which enables both the activating motors of the main and auxiliary pumps to operate, or only one of them to operate.
  • a pressure switch is located on the supply circuit of each of the motors, which pressure switch is normally closed when the delivery pressure of the respective pump is lower than a predetermined calibration value, and opens automatically when the pressure exceeds the calibration value.
  • the opening of the pressure switch causes the halting of the respective pump.
  • the opening of the pressure switch takes place when the dispensing lance is closed, with a consequent increase in pressure upstream thereof.
  • the water cleaner machine is excessively complicated, comprises a large number of components and does not enable automatically adapting the functioning to the operator's needs.
  • the aim of the present invention is to obviate the drawbacks of the prior art with a solution that is simple, reliable and economical.
  • the aim is attained by a water cleaner machine having the characteristics set down in the main claim; the secondary claims relate to constructional variants aimed at improving the results of the invention.
  • the water cleaner machine of the invention comprises two electric pumps in parallel, supplied by a single water source, and connected to a single dispensing lance of water at a high pressure, via appropriate three-way connectors
  • Each pump is activated by a respective electric motor.
  • the command circuit of the two electric motors which activate the pumps comprises a three-way switch, activated by the operator. In a first position of the switch the electric power source to both the motors is OFF; in a second position of the switch, only one electric pump is electrically supplied; in the third position of the switch both the electric pumps are electrically supplied.
  • the invention includes a single pressure switch, located on the delivery conduit of one of the two electric pumps, and which in turn is connected to the dispensing lance.
  • the pressure switch is normally-closed, in the ON position, and opens into the OFF position when the pressure exceeds a predetermined value.
  • the figures show the supply line 1 of the electric current, which comprises two cables of which one, L, is the live line and the other N, is the neutral phase.
  • the cables L and N lead from a switch 2 activated manually by means of a button S, from which the electric supply cables for two electric motors M1 and M2 lead to the high-pressure pumps P1 and P2.
  • the button S places the switch 2 in three different positions.
  • the button S connects the line cable L with a cable 12 terminating at the motor M2 and with a cable 10 terminating at the motor M1.
  • the switch 2 connects the line cable L with the cable 10 terminating only at the motor M1.
  • the switch 2 In a third position, illustrated in figure 1 , the switch 2 interrupts the connection of the cable L with both motors.
  • the switch 2 connects the cable of the neutral phase N with a cable 4 terminating at a pressure sensor 5.
  • the pressure sensor 5 is positioned on the delivery line 6 of the pump P1, the supply conduit of which is denoted by reference numeral 66.
  • the supply conduit 77 of the pump P2 is placed in parallel with the conduit 66, and both source from a single supply conduit 67 via a three-way connector, not illustrated in detail.
  • the supply conduit 6 of the pump P1 and the delivery conduit 7 of the pump P2 both flow into a single supply conduit 76 via a three-way connector, not illustrated in detail.
  • a one-way valve 8 is positioned on the delivery conduit 7, which prevents back-flow of the water towards the pump P2.
  • the conduit 76 terminates at a dispensing lance, not illustrated, which is activated by the operator by means of a trigger.
  • the pressure switch 5 places the neutral phase cable N in communication with both the motors M1 and M2, when the water pressure delivered by the pump P1 is lower than a determined value.
  • the invention functions as follows.
  • both the motors M1 and M2 are inactive, and the pumps P1 and P2 are both inactive.
  • the pressure-sensitive switch 5 is in the closed position, since the dispensing pressure of the pump P1 is zero.
  • the pressure-sensitive switch 5 opens, as the pressure exceeds the calibration value, and the motor M1, or both motors M1 and M2 halt.
  • the pressure-sensitive switch 5 closes and the motor M1 or both the motors M1 and M2, according to the position of the switch 2, start up.
  • the only activities requested of the operator are the activating of the switch 2, and the trigger which opens the dispensing of the lance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP17196481.0A 2016-11-11 2017-10-13 A water cleaner machine Active EP3320989B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17196481T PL3320989T3 (pl) 2016-11-11 2017-10-13 Urządzenie do czyszczenia wodą

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102016000113873A IT201600113873A1 (it) 2016-11-11 2016-11-11 Macchina idropulitrice

Publications (2)

Publication Number Publication Date
EP3320989A1 EP3320989A1 (en) 2018-05-16
EP3320989B1 true EP3320989B1 (en) 2020-04-15

Family

ID=58163164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17196481.0A Active EP3320989B1 (en) 2016-11-11 2017-10-13 A water cleaner machine

Country Status (5)

Country Link
EP (1) EP3320989B1 (pl)
CN (1) CN108067457B (pl)
ES (1) ES2794616T3 (pl)
IT (1) IT201600113873A1 (pl)
PL (1) PL3320989T3 (pl)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202000002509A1 (it) * 2020-02-10 2021-08-10 Annovi Reverberi Spa Idropulitrice
EP3944905A1 (en) 2020-07-29 2022-02-02 Annovi Reverberi S.p.A. Pressure washer provided with an electric battery

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2350876A (en) * 1938-12-17 1944-06-06 Clarkson Alick Cleaning apparatus
US3481544A (en) * 1968-02-01 1969-12-02 Otto V Jackson Mobile cleaning unit
US4552162A (en) * 1983-05-26 1985-11-12 Sioux Steam Cleaner Corporation Electric combination cleaner
US5571259A (en) * 1995-03-20 1996-11-05 Robin & Leslie Co., Ltd. Structure of washing machine
DE102005028116A1 (de) * 2005-06-13 2006-12-14 Alfred Kärcher Gmbh & Co. Kg Verfahren zum Steuern eines Reinigungsgerätes und Reinigungsgerät zur Durchführung des Verfahrens
CN105598065B (zh) * 2014-10-30 2018-07-24 上海水威机械设备技术有限公司 一种高压清洗系统及其控制方法
JP6398618B2 (ja) * 2014-10-31 2018-10-03 工機ホールディングス株式会社 洗浄機
CN104624546B (zh) * 2015-03-02 2016-07-06 四川力锋科技股份有限公司 一种有线远控高压清洗机
CN204672602U (zh) * 2015-04-10 2015-09-30 江苏苏美达五金工具有限公司 一种多种工作模式的高压清洗机
CN104741334B (zh) * 2015-04-10 2016-10-19 江苏苏美达五金工具有限公司 一种多种工作模式的高压清洗机

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ES2794616T3 (es) 2020-11-18
EP3320989A1 (en) 2018-05-16
CN108067457A (zh) 2018-05-25
PL3320989T3 (pl) 2020-10-05
IT201600113873A1 (it) 2018-05-11
CN108067457B (zh) 2021-09-28

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