EP3320989B1 - A water cleaner machine - Google Patents
A water cleaner machine Download PDFInfo
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 24
- 230000003213 activating effect Effects 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Images
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)
Description
- 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.
- To satisfy the requirements of the operator, and make available various flow rates of pressurised water dispensed by the lance, Chinese utility model
CN 204672602 andUS3481544 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.
- In particular, 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 known solution, while enabling a considerable energy saving, obtained by adapting the functioning of one or both of the pumps of the water cleaner machine to the operator's needs, is however not free of drawbacks.
- In fact 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.
- Exceeding this value is caused by the closing of the dispensing lance by the operator.
- The advantages and functional and constructional characteristics of the invention will emerge from the detailed description that follows, which with the aid of the appended tables of drawings illustrates a particular preferred embodiment thereof, given by way of non-limiting example.
-
Figure 1 is the electrical and hydraulic diagram of the invention in non-active conditions. -
Figure 2 is the electrical and hydraulic diagram of the invention with only one pump motor active. -
Figure 3 is the electrical and hydraulic diagram of the invention with both motor pumps active. - 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. - In a first position, illustrated in
figure 3 , the button S connects the line cable L with acable 12 terminating at the motor M2 and with acable 10 terminating at the motor M1. - In a second position, illustrated in
figure 2 , theswitch 2 connects the line cable L with thecable 10 terminating only at the motor M1. - In a third position, illustrated in
figure 1 , theswitch 2 interrupts the connection of the cable L with both motors. - In all three positions, the
switch 2 connects the cable of the neutral phase N with acable 4 terminating at apressure sensor 5. - The
pressure sensor 5 is positioned on thedelivery line 6 of the pump P1, the supply conduit of which is denoted byreference numeral 66. - The
supply conduit 77 of the pump P2 is placed in parallel with theconduit 66, and both source from asingle supply conduit 67 via a three-way connector, not illustrated in detail. - The
supply conduit 6 of the pump P1 and thedelivery conduit 7 of the pump P2 both flow into asingle supply conduit 76 via a three-way connector, not illustrated in detail. - A one-
way valve 8 is positioned on thedelivery 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.
- In rest conditions the
switch 2 is in the illustrated position infigure 1 , and the dispensing lance (not illustrated) is in the closed configuration. - In this configuration 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. - When the operator wishes to set the water cleaner machine in operation, it is sufficient to activate the
manual switch 2 so as to power one or both of the motors M1 and M2. - In this position at least the pump P1 is set in motion and brings the dispensing pressure to a value of greater than the calibration value.
- The pressure-
sensitive switch 5 opens, as the pressure exceeds the calibration value, and the motor M1, or both motors M1 and M2 halt. - When the operator desires to dispense pressurised water, it is sufficient to operate the trigger of the dispensing lance and the water pressure upstream diminishes, the pressure-
sensitive switch 5 closes and the motor M1 or both the motors M1 and M2, according to the position of theswitch 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. - When the operator desires to halt dispensing of the pressurised water, it is sufficient to operate the trigger to close the dispensing lance, at which the water pressure upstream of the lance increases beyond the calibration value and the pressure-
sensitive switch 5 opens and halts one of or both of the motors M1 and M2. - It is understood that the invention is not limited to the above-described example, and that variants and improvements may be made thereto without its forsaking the protective scope of the following claims.
Claims (3)
- A water cleaner machine comprising at least two motors (M1, M2) each activating a respective pump (P1, P2), the pumps being connected in parallel to a water supply line (67) and leading to a common dispensing conduit (76) comprising a high-pressure lance activated by a trigger, characterised in that it comprises a single switch (2) having a manual activation (S) which can be positioned in a first position in which both the motors (M1, M2) are disconnected from an electric power source (1), in a second position in which only one motor (M1) is connected to the electric power source (1) and in a third position in which both the motors (M1, M2) are connected to an electric power source (1), a normally-closed pressure switch (5) being placed on a delivery conduit (6) of one of the pumps (P1), which pressure switch (5) is adapted to open when the pressure exceeds a calibration value, in order to halt one of or both of the motors (M1, M2).
- The water cleaner machine of claim 1, characterised in that the two pumps (P1, P2) are identical.
- The water cleaner machine of claim 1, characterised in that the two motors (M1, M2) are identical.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL17196481T PL3320989T3 (en) | 2016-11-11 | 2017-10-13 | A water cleaner machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT102016000113873A IT201600113873A1 (en) | 2016-11-11 | 2016-11-11 | Pressure washer machine |
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 (en) |
CN (1) | CN108067457B (en) |
ES (1) | ES2794616T3 (en) |
IT (1) | IT201600113873A1 (en) |
PL (1) | PL3320989T3 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT202000002509A1 (en) * | 2020-02-10 | 2021-08-10 | Annovi Reverberi Spa | HIGH PRESSURE WASHER |
EP3944905A1 (en) * | 2020-07-29 | 2022-02-02 | Annovi Reverberi S.p.A. | Pressure washer provided with an electric battery |
Family Cites Families (10)
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 (en) * | 2005-06-13 | 2006-12-14 | Alfred Kärcher Gmbh & Co. Kg | Method for controlling a cleaning device and cleaning device for carrying out the method |
CN105598065B (en) * | 2014-10-30 | 2018-07-24 | 上海水威机械设备技术有限公司 | A kind of high-pressure cleaning system and its control method |
JP6398618B2 (en) * | 2014-10-31 | 2018-10-03 | 工機ホールディングス株式会社 | washing machine |
CN104624546B (en) * | 2015-03-02 | 2016-07-06 | 四川力锋科技股份有限公司 | A kind of wired remote control jetting machine |
CN104741334B (en) * | 2015-04-10 | 2016-10-19 | 江苏苏美达五金工具有限公司 | The jetting machine of one kind of multiple mode of operations |
CN204672602U (en) * | 2015-04-10 | 2015-09-30 | 江苏苏美达五金工具有限公司 | The jetting machine of one kind of multiple mode of operations |
-
2016
- 2016-11-11 IT IT102016000113873A patent/IT201600113873A1/en unknown
-
2017
- 2017-10-13 EP EP17196481.0A patent/EP3320989B1/en active Active
- 2017-10-13 ES ES17196481T patent/ES2794616T3/en active Active
- 2017-10-13 PL PL17196481T patent/PL3320989T3/en unknown
- 2017-10-31 CN CN201711047574.4A patent/CN108067457B/en active Active
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
ES2794616T3 (en) | 2020-11-18 |
EP3320989A1 (en) | 2018-05-16 |
CN108067457A (en) | 2018-05-25 |
CN108067457B (en) | 2021-09-28 |
PL3320989T3 (en) | 2020-10-05 |
IT201600113873A1 (en) | 2018-05-11 |
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