EP3213665A1 - Aspirateur industriel pour substances liquides avec un dispositif de détection du niveau de remplissage de son réservoir - Google Patents
Aspirateur industriel pour substances liquides avec un dispositif de détection du niveau de remplissage de son réservoir Download PDFInfo
- Publication number
- EP3213665A1 EP3213665A1 EP17158235.6A EP17158235A EP3213665A1 EP 3213665 A1 EP3213665 A1 EP 3213665A1 EP 17158235 A EP17158235 A EP 17158235A EP 3213665 A1 EP3213665 A1 EP 3213665A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- detection device
- level
- vacuum cleaner
- control signal
- control unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 37
- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 239000000126 substance Substances 0.000 title claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 239000012263 liquid product Substances 0.000 claims abstract description 3
- 230000000630 rising effect Effects 0.000 claims abstract description 3
- 230000000903 blocking effect Effects 0.000 claims description 13
- 238000005516 engineering process Methods 0.000 claims description 7
- 230000011664 signaling Effects 0.000 claims description 4
- 230000000007 visual effect Effects 0.000 claims description 4
- 230000033001 locomotion Effects 0.000 description 3
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
- A47L7/0004—Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners
- A47L7/0023—Recovery tanks
- A47L7/0028—Security means, e.g. float valves or level switches for preventing overflow
Definitions
- the invention relates to the industrial vacuum cleaner sector.
- the invention concerns an industrial vacuum cleaner, for liquid substances, with detection device of the level of filling of its collection tank.
- Industrial vacuum cleaners in mobile or fixed version, are machines able to vacuum material, either powders or liquids, in large quantities. They are machines designed to operate for long periods of time in extreme conditions and with the possibility of rapidly discharging the vacuumed material.
- Conventional vacuum cleaners for liquids essentially comprise at least one vacuum turbine, containment means of the liquid substances vacuumed (generally a cylindrical tank to which a vacuum brush is connected with a flexible hose) and an electrical control unit of the various functions generally positioned on the lid of the tank, which also acts as supporting base for the vacuum turbine.
- the turbine draws in air, creating a vacuum pressure in the collection tank: the vacuumed air draws with it the liquids, which fill said tank.
- the float When the liquid in the tank has reached a predefined maximum safety level, the float is raised by the same liquid, so as to operate said micro switch, causing closing of the electrical circuit connected to said electrical control unit.
- the electrical control unit stops the turbine of the vacuum cleaner to prevent further liquids from being introduced into the tank.
- the change of state signal is transmitted from the micro switch to the electrical control unit by means of said wired connection that joins the housing positioned in the tank to the control unit associated with the lid.
- a wired connection can be subject to undesirable malfunctions.
- a wired connection, without protection can in fact be accidentally tampered with, for example with detachment, even partial, of the cable, without faults and problems being indicated. Therefore, there is the risk of the device failing to correctly detect that the maximum filling level has been reached, and of excess liquids being vacuumed, with the drawbacks described above.
- the operator in vacuum cleaners of small size, after having disconnected the cable from the control unit to remove the lid and empty the tank, may reconnect the cable incorrectly, or even forget to connect it, making the maximum level indicator device useless.
- the vacuumed liquid inside the collection tank often reaches conditions of turbulent motion, thereby creating vortices.
- the waves created by the liquid in its swirling movement can accidentally raise and lower the float several times, causing a succession of changes of status of the micro switch, even before the maximum filling level is reached in the tank.
- Continuous contacts and releases of the micro switch cause continuous pulses to generate a control signal to stop the turbine.
- the device is activated and deactivated continuously, without carrying out its correct function, causing the operator to disconnect the signal cable to deactivate the device.
- the object of the invention is to eliminate these problems, producing an industrial vacuum cleaner with detection device of the level of filling with improved technical and functional performances with respect to prior art devices, with particular attention to management of consumptions.
- the aim is achieved with an industrial vacuum cleaner for liquid substances with detection device of the level of filling of its collection tank, wherein said vacuum cleaner comprises:
- said wireless technology is of radio wave type.
- said emitter comprises battery power supply means
- said receiver comprises connection means to an electrical power supply network with interposition of a transformer.
- said emitter comprises means for setting the duration of said control signal generated.
- said electrical control unit comprises resettable blocking means of said at least one turbine, activated by the first pulse generated by said control signal.
- said resettable blocking means comprise a selector switch of manually controlled type.
- said resettable blocking means comprise a lever adapted to operate said selector switch from the outside of the lid of the vacuum cleaner where said electrical control unit is housed.
- said resettable blocking means comprise visual signalling means of the blocked condition of said at least one turbine.
- Wireless technology ensures optimal performance without the risk of malfunction: in fact, no cable is exposed outside the vacuum cleaner.
- Wireless technology in particular electromagnetic waves, always ensures transmission of the control signal from the emitter to the receiver.
- the circuit board comprises setting means that allow setting of the maximum emission time of the control signal, with significant savings in terms of energy absorption and consequent increased duration of the power supply battery of the emitter.
- the resettable blocking means of said turbine inhibit the operation of the turbine at the first pulse generated by the micro switch: the control unit manages the control signal only once, preventing the device from continuing to activate and deactivate due to repeated oscillations of the float, at the mercy of the waves generated by swirling of the flow of vacuumed liquid.
- the visual signalling means of the blocked condition of the turbine facilitate the work of the operator, immediately referred to the operations to reset the device.
- an industrial vacuum cleaner 1 for liquids comprising:
- Said vacuum cleaner 1 comprises a detection device 2 of the level of liquid L reached in said tank 4.
- said device 2 comprises:
- Said transmission means comprise an emitter 9 and a receiver 10 in communication with each other.
- Said emitter 9 is associated with a circuit board, in turn associated with said micro switch 8, and is provided with battery power supply means 11.
- Said receiver 10 is associated with said electrical control unit 5 and comprises connection means to an electrical power supply network.
- a transformer for example 230v-12v is interposed between said receiver 10 and said electrical power supply network.
- Said emitter 9 and said receiver 10 communicate with systems based on wireless technology, without cables and physical connections.
- said wireless technology is of electromagnetic wave type, in particular radio wave type.
- said float 7 as a result of the vacuumed liquid L reaching the maximum level MAX of filling of the tank 4, is thrust upward in said housing 6, until its magnetic field interacts with said micro switch 8 ( Fig. 4 ).
- Said change of state is managed by said circuit board to generate a control signal that said emitter 9 will send via radio waves to said receiver 10 so that it is then managed by the electrical control unit 5 on which the same receiver is provided.
- Said control signal is thus adapted to cause said vacuum turbine 3 to stop upon reaching a predefined maximum level MAX of filling of the tank 4 of the liquids.
- Said emitter 9 comprises setting means (not illustrated) of the duration of said control signal generated.
- An optimal, but purely indicative, duration time of the control signal is of a few seconds, for example 5 seconds.
- Said electrical control unit 5 comprises reversible resettable blocking means (not illustrated) of said at least one vacuum turbine 3, activated by the first pulse generated by said control signal received by said receiver 10.
- Said blocking means comprise visual signalling means 13 of the blocked condition of said at least one turbine 3.
- Said electrical control unit 5 comprises resetting means of said blocking means that can be operated from the outside of said control unit, adapted to reactivate said at least one turbine 3, once the vacuumed liquids L have been emptied from the tank 4.
- Said resetting means comprise a selector switch 12 of manually controlled type.
- Said resetting means comprise a selector switch 12 of manually controlled type.
- to reset the blocking means of the turbine it is necessary to position the selector switch 12 to OFF, corresponding to the vacuum cleaner 1 being switched off, and then to move it to ON and/or modulate it to the various vacuum speeds of the turbine 3.
- said resetting means comprise a lever adapted to operate said selector switch.
- the movement of said lever is also associated with reversal of the vacuum flow of the turbine, which no longer flows into the liquid containment means, but in the opposite direction, with the aim of discharging the liquid and emptying of the tank.
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Level Indicators Using A Float (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITUB2016A001215A ITUB20161215A1 (it) | 2016-03-01 | 2016-03-01 | Aspiratore industriale di sostanze liquide con dispositivo di rilevamento del livello di riempimento del suo serbatoio |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3213665A1 true EP3213665A1 (fr) | 2017-09-06 |
EP3213665B1 EP3213665B1 (fr) | 2018-11-07 |
Family
ID=56235978
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17158235.6A Active EP3213665B1 (fr) | 2016-03-01 | 2017-02-27 | Aspirateur industriel pour substances liquides avec un dispositif de détection du niveau de remplissage de son réservoir |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3213665B1 (fr) |
ES (1) | ES2709939T3 (fr) |
IT (1) | ITUB20161215A1 (fr) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3772314A1 (fr) | 2019-08-09 | 2021-02-10 | Leifheit AG | Aspirateur eau et poussière |
DE102019121604A1 (de) * | 2019-08-09 | 2021-02-11 | Leifheit Ag | Nass-/Trockensauggerät |
US11172801B2 (en) | 2020-01-06 | 2021-11-16 | Techtronic Cordless Gp | Full recovery tank shutoff |
DE102019121608B4 (de) | 2019-08-09 | 2023-10-05 | Leifheit Ag | Nass-/Trockensauggerät |
DE102019121607B4 (de) | 2019-08-09 | 2024-01-04 | Leifheit Ag | Nass-/Trockensauggerät |
US12004705B2 (en) | 2021-11-15 | 2024-06-11 | Techtronic Floor Care Technology Limited | Full recovery tank shutoff |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5465455A (en) * | 1994-05-27 | 1995-11-14 | Allen; Harold | Overload controlled wet and dry vacuum apparatus |
WO2000042893A2 (fr) * | 1999-01-20 | 2000-07-27 | Shop Vac Corporation | Aspirateur a evacuation automatique et systeme d'amorçage a partir de la sortie de la pompe |
US20060260088A1 (en) * | 2005-05-17 | 2006-11-23 | Lg Electronics Inc. | Upright type vacuum cleaner with water cleaning function |
-
2016
- 2016-03-01 IT ITUB2016A001215A patent/ITUB20161215A1/it unknown
-
2017
- 2017-02-27 EP EP17158235.6A patent/EP3213665B1/fr active Active
- 2017-02-27 ES ES17158235T patent/ES2709939T3/es active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5465455A (en) * | 1994-05-27 | 1995-11-14 | Allen; Harold | Overload controlled wet and dry vacuum apparatus |
WO2000042893A2 (fr) * | 1999-01-20 | 2000-07-27 | Shop Vac Corporation | Aspirateur a evacuation automatique et systeme d'amorçage a partir de la sortie de la pompe |
US20060260088A1 (en) * | 2005-05-17 | 2006-11-23 | Lg Electronics Inc. | Upright type vacuum cleaner with water cleaning function |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3772314A1 (fr) | 2019-08-09 | 2021-02-10 | Leifheit AG | Aspirateur eau et poussière |
DE102019121604A1 (de) * | 2019-08-09 | 2021-02-11 | Leifheit Ag | Nass-/Trockensauggerät |
DE102019121604B4 (de) | 2019-08-09 | 2021-12-30 | Leifheit Ag | Nass-/Trockensauggerät |
DE102019121608B4 (de) | 2019-08-09 | 2023-10-05 | Leifheit Ag | Nass-/Trockensauggerät |
DE102019121607B4 (de) | 2019-08-09 | 2024-01-04 | Leifheit Ag | Nass-/Trockensauggerät |
US11172801B2 (en) | 2020-01-06 | 2021-11-16 | Techtronic Cordless Gp | Full recovery tank shutoff |
US12004705B2 (en) | 2021-11-15 | 2024-06-11 | Techtronic Floor Care Technology Limited | Full recovery tank shutoff |
Also Published As
Publication number | Publication date |
---|---|
ITUB20161215A1 (it) | 2017-09-01 |
EP3213665B1 (fr) | 2018-11-07 |
ES2709939T3 (es) | 2019-04-22 |
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