EP0256544A2 - Unterdruckreinigungsanlage - Google Patents

Unterdruckreinigungsanlage Download PDF

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Publication number
EP0256544A2
EP0256544A2 EP87111886A EP87111886A EP0256544A2 EP 0256544 A2 EP0256544 A2 EP 0256544A2 EP 87111886 A EP87111886 A EP 87111886A EP 87111886 A EP87111886 A EP 87111886A EP 0256544 A2 EP0256544 A2 EP 0256544A2
Authority
EP
European Patent Office
Prior art keywords
tank
vacuum
conduit
level
central
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.)
Withdrawn
Application number
EP87111886A
Other languages
English (en)
French (fr)
Other versions
EP0256544A3 (de
Inventor
Fred D. C/O Atlantic Re-Nu Ewing
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.)
Atlantic Re-Nu Consultants Ltd
Original Assignee
Atlantic Re-Nu Consultants Ltd
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 Atlantic Re-Nu Consultants Ltd filed Critical Atlantic Re-Nu Consultants Ltd
Publication of EP0256544A2 publication Critical patent/EP0256544A2/de
Publication of EP0256544A3 publication Critical patent/EP0256544A3/de
Withdrawn legal-status Critical Current

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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
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • A47L5/38—Built-in suction cleaner installations, i.e. with fixed tube system to which, at different stations, hoses can be connected

Definitions

  • the present invention relates to central vacuum cleaning systems and in particular to a central vacuum cleaning system wherein a plurality of outlets, each for connection to a cleaning head, is disposed throughout a building or the like and operatively associated with a central unit disposed usually in the basement of a building or on a mobile unit.
  • the type of vacuum cleaning system to which the present invention pertains is particularly, but not exclusively, a central vacuum cleaning units operating not only with vacuum but by also capable of injecting or spraying a cleaning liquid, e.g. hot water, at the point of the cleaning head so that the debris returned through the suction conduit of the system to the central debris collecting tank enters the tank in the form of a mixture of solid debris particles and a liquid, e.g. water.
  • an automatic window washer which includes a storage tank 56 from which used cleaning liquid is to be removed and the tank recharged with new cleaning liquid.
  • the structure of storage tank 56 enables both operations to be performed simultaneously. This is accomplished by first closing an inlet valve 250 and opening drain valve 326. Thereafter another inlet valve 174 is opened so that new cleaning liquid can be introduced into a lower compartment 170 of the tank. The closing of valve 270 results in the discontinued operation of a vacuum pump 50. Accordingly, this arrangement again shows the need for discontinuing the vacuum within the collecting tank.
  • Other arrangements pointing out to the same drawbacks include Zell et al. U.S. Patent 4,530,131 issued July 23, 1985 and Ogden U.S. Patent 4,480,309 issued April 8, 1986.
  • the present invention provides, for use in a central vacuum cleaning system: a central debris collecting tank for a mixture of debris and a liquid, said tank being provided with a first conduit adapted to communicate the tank with a vacuum pump, said first conduit having an inlet in said tank at a first level; return conduit means adapted to be connected, exteriorly of the tank, with a debris return piping of an associated central vacuum cleaning system, said return conduit means terminating in said tank at a second level disposed below said first level; and a drainage conduit having an inlet port in said tank and at a level below said second level, said drainage conduit being arranged for operative connection to a sludge pump.
  • the present invention can also be defined, in general terms, as providing a vacuum cleaning system of the type including a central debris collecting tank, return conduit means communicating said tank with a plurality of working outlets, each working outlet including a vacuum hose connection means, a pressurized liquid outlet connection means and an electric control unit for actuating a vacuum pump operatively connected to said central tank to induce suction at the vacuum hose connection, said vacuum hose connection and said pressurized liquid outlet connection being arranged for an operative connection to a cleaning head adapted to drive a cleaning liquid into a floor covering and to return to said conduit means a mixture of debris and said fluid for collection in said tank, said system comprising, in combination: a first conduit communicating the tank with a vacuum pump, said first conduit having an inlet port within the tank and disposed at a first level; said return conduit means having a discharge port within said tank at a second level disposed below said first level; a drainage conduit having an inlet port in said tank, said inlet port being disposed at a third level disposed below said second level
  • FIGURE 1 shows a partial cross-sectional view of a building utilizing the present invention.
  • the building has a basement area 10 , a ground floor area 11 and the second floor 12 , it being understood that the number of floors is optional.
  • the central vacuum system includes a central vacuum unit 13 comprising a debris collection tank 14 which communicates through a roughed-in piping system 15 with a plurality of outlets 16 , 17 at floors 11 and 12 of the building.
  • a water/chemical mixture is forced through a pipe 18 to the different outlets 16, 17.
  • the cleaning liquid mixture is supplied to the head by pressurized hose 20 and returned by a vacuum hose 21 which is in communication with the piping system 15. Since the piping system 15 and the vacuum hose 21 communicate with the tank 14 in which vacuum is maintained, they serve for return of a mixture of debris particles and liquid, the latter originally supplied through pressurized hose 20, back to the tank 14. Therefore, the piping system 15 is to be viewed as an embodiment of what is generally referred to as "return conduit means".
  • FIGURE 2 shows, in a very simplified, diagrammatic way and with certain parts omitted for the sake of clarity, the general arrangement of the tank 14 within the system.
  • FIGURE 2 shows that the tank 14 is provided with a first conduit 22 which communicates the tank 14 with a vacuum pump 23 .
  • the first conduit 22 terminates within the tank 14 at a first level 24 which is near the top of the tank 14.
  • the piping system 15, on the other hand, terminates within the tank 14 at a second level 25 disposed below the first level 24.
  • a drainage conduit 26 communicates with the interior of tank 14 near the bottom 27 , i.e. at a level which is below the second level.
  • the drainage conduit 26 is provided with a sludge pump 28 ; the sludge pump 28 is of the type capable of developing, at its suction side 29 , vacuum of approximately 19" of mercury which is in excess of the vacuum which the vacuum pump 23 is capable of developing within the tank 14, the latter being approximately 13" of mercury.
  • a one-way check valve 30 disposed downstream of the sludge pump 28 prevents return of air or of the pumped mixture from sewage 31 or the like.
  • FIGURE 2 shows the basic features of the structure of the present invention.
  • FIGURE 5 shows a cross-sectional view, similar to that of FIGURE 4, but which also includes diagrammatic representations of additional elements of the present system.
  • a water inlet 32 is shown which is provided, at its discharge end, with a mist creating nozzle 33 .
  • the water inlet 32 with nozzle 33 is preferred even if the system operates with a cleaning liquid delivered through the pipe 18, as described above.
  • Reference numeral 34 denotes an emergency shut-off overflow sensor.
  • the sensor is displayed at a level 35 which is above the second level 25 but well below the first level 24.
  • the inlet port of first conduit 22 is provided with a fine mesh screen 36 .
  • the vacuum pump or rotary blower 23 has a discharge vent 37 (FIGURES 3 and 4) usually connected to a silencer or the like noise reducing equipment (not shown in the drawing).
  • the highly pressurized fluid for cleaning purposes, supplied through pipe 18 is delivered by a system including a motorized mixing valve 38 connected to a hot water source by a chemical injector remote control unit (not shown), a piston pump 40 driven by electric motor 41 and by many other control and operation units and sensors well known in the art and therefore not described in greater detail.
  • the unit is activated by starting the vacuum pump 23. This generates vacuum within the collection tank 14 which is transmitted to the different outlets 16, 17. When a hose 21 is inserted in an outlet 17, the vacuum is transmitted to the nozzle 19. Any debris collected by the nozzle 19 returns through vacuum hose 21 and piping system 15 into the tank 14. If the pressurized hose 20 supplies cleaning liquid, then the returning mixture is that of solid debris particles and a liquid. If the use of the cleaning liquid is not desired, then suitable means for supply of water mist is connected to water inlet 32 (FIGURE 5), as is well known in the art.
  • the debris/liquid mixture As the debris/liquid mixture is delivered through piping system 15, or a dry debris is blown into a layer of water supplied by the nozzle 33, it eventually reaches a level slightly below the second level 25. This is sensed by a suitable level sensor (not shown in the drawings) which then actuates the sludge pump 28 while the vacuum pump 23 maintaining vacuum within the tank 14 continues to operate.
  • the sludge pump 28 can overcome the vacuum within the tank and will thus remove from it virtually all of the debris/liquid mixture accumulated at the bottom of tank 14. If for any reason the sludge removal fails, there is a second level sensor 34 (FIGURE 5) which will automatically shut down the entire system as soon as the debris/liquid mixture reaches level 35.
  • the arrangement is such that vacuum is maintained within the tank 14 in a continuous fashion which means that the capacity of the tank 14 can be relatively small resulting in a light-weight tank 14. Even more important, the entire system does not have to be shut down whenever it is desired to empty the vacuum tank 14 which is of advantage not only from the standpoint of economy of the overall operation but also from the standpoint of efficient cleaning operation.

Landscapes

  • Cleaning In General (AREA)
EP87111886A 1986-08-19 1987-08-17 Unterdruckreinigungsanlage Withdrawn EP0256544A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA000516273A CA1268305A (en) 1986-08-19 1986-08-19 Vacuum cleaning system
CA516273 1986-08-19

Publications (2)

Publication Number Publication Date
EP0256544A2 true EP0256544A2 (de) 1988-02-24
EP0256544A3 EP0256544A3 (de) 1988-09-21

Family

ID=4133755

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87111886A Withdrawn EP0256544A3 (de) 1986-08-19 1987-08-17 Unterdruckreinigungsanlage

Country Status (2)

Country Link
EP (1) EP0256544A3 (de)
CA (1) CA1268305A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2240466A (en) * 1990-02-02 1991-08-07 Darrell Kenneth Purchase Suction/blow cleaning system
WO1994020009A1 (en) * 1993-03-03 1994-09-15 Mcconnell Research Enterprises Pty.Ltd. Cleaning
WO1999040834A1 (en) * 1998-02-17 1999-08-19 Christian Floyd Thomas Jr Cleaning system for multiple level structures
PL422740A1 (pl) * 2017-09-04 2019-03-11 Czechowicz Michał Leovac Stacja odstawcza przewodu ssącego instalacji centralnego odkurzania

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US956231A (en) * 1908-03-02 1910-04-26 John Strother Thurman Single-tank vacuum cleaning apparatus.
US3286444A (en) * 1964-12-30 1966-11-22 Whirlpool Co Vacuum cleaner
US3705437A (en) * 1970-08-17 1972-12-12 Cleaning Systems Ind Inc Combination high pressure washer and vacuum
US4080104A (en) * 1976-05-14 1978-03-21 Brown Jr Edward C Wet-dry vacuum apparatus with pump means for discharging liquid therefrom
US4198724A (en) * 1978-07-03 1980-04-22 Spider Staging, Inc. Automatic window washer
US4378611A (en) * 1982-06-22 1983-04-05 James Ninehouser Multifunction cleaning and drying device
US4530131A (en) * 1983-10-28 1985-07-23 The United States Of America As Represented By The Secretary Of The Navy Automatic vacuum recyclable system for chemical-thermo cleaning of ship tanks and bilges
US4580309A (en) * 1984-06-08 1986-04-08 Rug Doctor, Inc. Self-contained multi-function cleaning system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2240466A (en) * 1990-02-02 1991-08-07 Darrell Kenneth Purchase Suction/blow cleaning system
WO1994020009A1 (en) * 1993-03-03 1994-09-15 Mcconnell Research Enterprises Pty.Ltd. Cleaning
WO1999040834A1 (en) * 1998-02-17 1999-08-19 Christian Floyd Thomas Jr Cleaning system for multiple level structures
PL422740A1 (pl) * 2017-09-04 2019-03-11 Czechowicz Michał Leovac Stacja odstawcza przewodu ssącego instalacji centralnego odkurzania
PL232737B1 (pl) * 2017-09-04 2019-07-31 Czechowicz Michal Leovac Stacja odstawcza przewodu ssącego instalacji centralnego odkurzania

Also Published As

Publication number Publication date
EP0256544A3 (de) 1988-09-21
CA1268305A (en) 1990-05-01

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Inventor name: EWING, FRED D.C/O ATLANTIC RE-NU