EP0301132A1 - Aspirateur pour liquide - Google Patents

Aspirateur pour liquide Download PDF

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Publication number
EP0301132A1
EP0301132A1 EP87118734A EP87118734A EP0301132A1 EP 0301132 A1 EP0301132 A1 EP 0301132A1 EP 87118734 A EP87118734 A EP 87118734A EP 87118734 A EP87118734 A EP 87118734A EP 0301132 A1 EP0301132 A1 EP 0301132A1
Authority
EP
European Patent Office
Prior art keywords
suction
filter
switch
chamber
housing
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Withdrawn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
EP87118734A
Other languages
German (de)
English (en)
Inventor
Apparatebau Gmbh Co Kg Esta
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.)
Esta Apparatebau GmbH and Co KG
Original Assignee
Esta Apparatebau GmbH and Co KG
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 Esta Apparatebau GmbH and Co KG filed Critical Esta Apparatebau GmbH and Co KG
Publication of EP0301132A1 publication Critical patent/EP0301132A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • A47L7/0019—Details of the casing
    • 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
    • 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
    • A47L7/0038—Recovery tanks with means for emptying the tanks
    • 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
    • A47L7/0042—Gaskets; Sealing means
    • 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
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/19—Means for monitoring filtering operation
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H4/00—Swimming or splash baths or pools
    • E04H4/14—Parts, details or accessories not otherwise provided for
    • E04H4/16—Parts, details or accessories not otherwise provided for specially adapted for cleaning
    • E04H4/1618—Hand-held powered cleaners
    • E04H4/1636—Suction cleaners

Definitions

  • the invention relates to a wet vacuum with a suction chamber and a suction inlet and a suction outlet.
  • Such wet vacuum cleaners are used for a wide variety of purposes, for example for swimming pool water cleaning, for vacuuming up moisture-containing dirt, as a decontamination vacuum cleaner by the fire brigade and the like.
  • a control signal depending on the inflow or on the intake of the suction material, with which the operation of the suction device can be influenced.
  • this control signal is suitable, for example, for filling level control, namely in order to avoid that further suction material is taken up, although the separator is already sufficiently filled and must therefore be emptied before further taking up.
  • Pneumatic or similar level controls or contactor circuits have proven to be insufficiently suitable for this purpose, especially since they are complicated in structure and therefore prone to failure and are associated with high costs.
  • the invention has for its object to provide a wet vacuum cleaner or a suction device of the type mentioned, which allows a simple structure to derive a control signal from the absorbed suction material in order to influence the operation of the suction device, a display device or the like ..
  • a membrane switch which is exposed to the suction material and which responds directly to the suction material, the membrane of which is thus exposed to the suction material, is provided for the delivery or generation of the control signal it can be acted upon by the suction material to generate a switching operation. It is conceivable to use this switch or the membrane in the area of a channel through which the suction material flows to limit the flow rate, in a separation room to limit the fill level, in front of a suction air opening to protect against the ingress of liquid or solid-particle-like suction material or for the like.
  • the membrane switch has an essentially liquid-tight switch housing which is sealed with respect to the suction material and has, for example, a switching membrane located on the end face. If the membrane is not to respond to air pressure differences, that is to say not to pneumatic loads, but only to direct mechanical pressure loads, the switch housing is expediently connected to a pressure compensation which, for example, ensures that the switch housing is essentially the same pressure as in the suction chamber.
  • the suction chamber can also be formed by an intermediate section of a channel.
  • the response sensitivity of the switch is infinitely adjustable, so that on the one hand it can be adapted to the desired operating conditions in a predetermined installation position and on the other hand one and the same switch can be installed for different purposes mentioned.
  • An electrical switching contact for example a microswitch, is preferably provided as the switching element influenced by the membrane of the membrane switch, so that the design is extremely simple and an electrical signal is available as a control signal.
  • the switching element is advantageously actuated directly within the switch housing via a spring-loaded switching plunger.
  • the membrane switch is arranged directly as an on and off switch in a switching circuit.
  • the control signal and the associated control process are only generated when the limit value to be detected with the switch has been reached or exceeded, and after falling below this control process is automatically canceled again without the operator having to carry out a separate switching operation manually.
  • the switch can be located in the switching circuit of the suction drive, so that it is switched off when the control signal is emitted and is automatically switched on again after the switch membrane is relieved by the suction material.
  • the switch it is also conceivable to use the switch to actuate a valve, for example a valve flap, to interrupt the suction process or to fill the separator.
  • the switch can be used in a particularly advantageous manner as a filling level limiting device in such a way that it switches off a suction fan unit, in particular its fan motor, via a motor protection switch when the predetermined filling level is reached.
  • the switch is expediently arranged in steps or infinitely adjustable with regard to its actuating position in such a way that it responds to different of the limit values mentioned.
  • the switch can be arranged such that the position can be changed with respect to the filling level.
  • the membrane can be provided upright, namely vertical or inclined downwards or upwards, essentially completely pointing upwards or lying upwards or essentially downwards or lying downwards. In the case of level control in particular, an upright position of the membrane close to or in a boundary wall of the separation space is preferred.
  • the switch is used in the manner of or instead of a float valve for an air suction opening, the membrane is expediently provided at the bottom or at the bottom of the switch housing, the membrane or the switch housing simultaneously forming a spray shield in front of or below the suction opening through which the suction opening is shielded from spray liquid.
  • the switch is suitable for being completely immersed in the liquid to be sucked or in the solid particles to be sucked up, so that the control signal is only generated when the sensitivity is set appropriately when the switch is already essentially completely within this suction .
  • a dry filter is arranged in the suction chamber above the separating space and between this and a suction connection in a filter space. This solves the problem that with a simple, compact structure and a relatively high storage capacity, a very clean exhaust air is essentially guaranteed regardless of whether damp, wet or dry dirt is being picked up.
  • the suction device according to the invention can also be used as a pure dry vacuum cleaner exclusively for absorbing dry dirt.
  • the dry filter is located in the same total space which also forms the separating space, so that very large filter areas can be used for dry cleaning of the air immediately after the pre-separation of any moist particles or liquids that may be present.
  • the suction device requires only a relatively small footprint and there is no need for a wet or wet filter, so that the reduction in performance usually associated with such a filter is avoided and the wet or wet components are filter-free directly in a collecting space be deposited.
  • the suction device according to the invention is particularly suitable for the disposal of metal and plastic chips on processing machines in which frequently, for. B.
  • the wet vacuum cleaner is particularly suitable for those mixing materials which contain at least three individual materials of different suspension behavior or different physical states.
  • a particularly simple and compact design can be achieved if, in order to limit the fill level of the collection or
  • the filling level limiting device is provided in the pre-separating chamber, which, for example, closes a suction valve leading to the pre-separator when the filling level is reached, or completely shuts off a suction blower unit associated with the suction device until a corresponding emptying has taken place.
  • no partition needs to be arranged between the filter space and the pre-separation space, so that the full width of the pre-separation space opens directly into the filter space and only relatively low flow velocities result even with high suction power within this total space. It also makes emptying the pre-separation chamber and cleaning or replacing the dry filter particularly easy.
  • the dry filter expediently has an expansion which corresponds approximately to the clear width of the pre-separating space, so that there is very good use of space in the interest of large filter areas.
  • the dry filter can be formed in a simple manner in the manner of a cartridge filter by an approximately cylindrical or jacket-shaped filter body, the filter jacket of which ensures a filter area which is substantially larger than that of the jacket surface due to the reciprocating, for example undulating, course of the filter material.
  • the spaces of the suction device are expediently formed by superimposed separate housing parts of essentially the same basic cross-section, so that a bucket or barrel-shaped boiler can be used to form the pre-separation chamber, onto which a corresponding further, but lower boiler is placed in reverse, so that one The boiler forms the bottom wall and the other boiler forms the top wall of the entire room.
  • the pre-separator room or the associated one Ge boiler can be in terms of its capacity, for example, in the order of 50 to 200 liters, preferably about 100 liters, while the filter housing and the dry filter are expediently designed so that an effective filter area of at least 1.5 to 5 m2, preferably of is about 3 m2.
  • the pre-separator space in the bottom area has an easily opening drain opening in the form of, for example, a shut-off valve or an opening which can be closed with a lid, since then the entire pre-separator space does not have to be emptied each time after reaching the maximum fill level. Instead, only the liquid has to be drained until the solid or heavy parts have reached the maximum level.
  • the components forming the pre-separator chamber and the filter chamber are expediently not directly integrated with a suction fan, but are attached externally to such a suction fan unit, so that these housing parts move independently of the suction fan unit for emptying or for filter change, i.e. H. for example, can be opened or tilted.
  • the filling height limiting device could also lie completely outside of the pre-separating space and respond, for example, to its weight or the like, but a particularly reliable design results if it has the limiting switch located within the pre-separating space and responding directly to the materials sucked in. If the limiting device is adjustable with regard to the fill level, this can be achieved by changing its sensitivity or directly by adjusting the height of the limit switch.
  • the limit switch is useful via a ver covers and thus protected connecting line connected to the control device for the suction fan unit that the mobility of the pre-separator relative to the suction fan is in no way impaired by this connecting line.
  • a cleaning device as described in DE-OS 34 10 817, can advantageously be used as a universal suction device, in particular for cleaning purposes, as occurs in the fire service, due to additional features and effects the subject of the invention is referred to this document.
  • the arrangement according to the invention of a switch which is actuated directly by the action of the suction material is provided near the suction opening of the suction fan or the fan blower in such a way that the back of the switch housing facing away from the membrane has a distance from the suction opening parallel to it, which can be approximately in the order of magnitude of its diameter or less.
  • the switch As soon as the switch is actuated, for example as a result of flooding by the suction material liquid, it switches off the fan blower which causes the suction flow of the cleaning device until the return device provided as an emptying device has emptied the intermediate liquid store provided as a separator by pumps to such an extent that the switch again released and thereby the fan blower is switched on again for further operation of the cleaning device.
  • a barrel-shaped, upright arranged main container 2 which has substantially the same outer and inner cross sections over its entire height, is provided, immediately behind which there is a substantially lower, substantially rectangularly limited suction fan unit 3, the width of which is approximately is equal to the width or the diameter of the main container 2.
  • the main tank 2 and the suction blower unit 3 connected to this in the working position essentially without gaps are arranged on a foot part 4 designed as a chassis, the self-guiding casters in the region of the front lying below the main container 2 and the larger impellers arranged at the rear end on both sides of the suction blower unit 3 having.
  • a bow-shaped handle 5 is provided for pushing or pulling the mobile suction device, so that the suction fan unit 3 is essentially arranged between this handle 5 and the main container 2 at the rear end of the foot part 4.
  • the main container 2 forms between a flat, uninterrupted bottom wall and a corresponding, substantially vertically overlying parallel top wall within the container casing a suction chamber 6 which is essentially the same cross-section over its entire height, but which is made up of two separate, inverted individual containers, namely a sub-container is in the form of a simple sheet metal boiler 7 and an upper container in the form of a filter housing 8.
  • the boiler 7 and the filter housing 8, which is also designed in the manner of a simple sheet metal boiler, can be of essentially the same design, namely essentially consist of a container jacket closed by a flanged seam and a bottom or top wall fastened by flanging.
  • the boiler 7 forms a pre-separating space 9 with a lower part of its height adjoining the bottom wall, while the filter housing 8 forms a filter space 10 over substantially its entire height, in which a dry filter 11 is arranged.
  • the dry filter 11 designed in the manner of a filter sleeve has an outer diameter which is only slightly smaller than the inner one diameter of the filter housing 8, wherein its inner diameter is considerably smaller compared to its material thickness in relation to the outer diameter that the flat filter material is folded back and forth in a zigzag shape between the outer and the inner circumference.
  • the filter housing 8 has on the lower, open end face a downwardly protruding plug collar 12 which surrounds the boiler 7 on the outer circumference and can be easily lifted off and exactly centers the two housing parts against one another.
  • ring-shaped, relatively soft seals 13, 14, for example made of foam rubber, are provided on both ends of the dry filter 11, between which the dry filter 11 is practically clamped.
  • the lower seal 13, which lies approximately at the level of the lower end face of the filter housing 8, can also be used for the connection of the filter housing 8 to the boiler 7, which connection is sealed off from the outside.
  • the upper seal 14 lies directly on the top wall 15.
  • a suction inlet 17 and a suction outlet 18 each open directly into the suction chamber 6, each of which is essentially formed by a plug-in sleeve 19 passing through the associated jacket for the easily detachable connection of, for example, a tubular suction channel.
  • a flexible suction hose 20 is connected with a mouthpiece at the end with which the material to be sucked up is received.
  • a suction channel 21 of the suction fan unit 3 which is flexible over part of its length, is connected to the suction outlet 18.
  • the suction outlet 18 opens directly into a filter chamber 22 which surrounds the dry filter 11 on the outer circumference and which is delimited on the outside by the jacket of the filter housing 8 and through which the dry filter 11 is uniformly exposed to the suction air over its entire circumference is struck, although the suction outlet 18 located above the center of the height of the dry filter 11 is only provided on a limited peripheral zone of the filter housing 8 facing the suction fan unit 3.
  • the suction inlet 17, like the suction outlet 18, is located radially to the central axis of the boiler 7, but is formed by a nozzle protruding slightly inwards into the suction chamber 6 and lies above the middle of the height of the boiler 7 or above the maximum filling height of the pre-separation chamber 9
  • Materials entering through the suction inlet 17 are separated from the incoming suction air flow by gravitation and, if necessary, by bouncing off on the opposite side of the boiler shell, so that they cannot get into the area of the dry filter 11, while the rest, possibly contaminated with fine dust Suction air flow into the interior of the dry filter 11, which is limited by the dry filter 11 and is only slightly less wide than the clear width of the boiler 7, then passes through this into the filter chamber 22 and finally through the suction outlet 18 from the suction chamber 6.
  • the dust accumulating on the inner circumference of the dry filter 11 can be detached to a considerable extent by tapping the filter housing 8 and then also falling into the pre-separation chamber 9. However, if the shavings are to remain unaffected by the dust, this dust can only be knocked off after the filter housing 8 has been removed from the dry filter 11, so that it has a relatively long service life.
  • a liquid emptying device is provided which, for. B. by an emptying opening 23 located in the bottom area is formed, which can be closed with a cover 24 that is easily removable from the outside, so that the liquid can be drained off at any time.
  • a limiting device 25 for the filling height is provided, which has a limiting switch located within the pre-separating space 9 directly on the inner circumference of the boiler 7 in the form of, for example, a membrane switch 26, which has an adjusting device 27 in the height direction is adjustable and lockable in the respectively set position.
  • the limit switch 26 lies essentially opposite the suction inlet 17 on the side of the boiler 7 facing the suction fan unit 3 and acts on the suction fan unit 3 via a helical connecting line 28 passing through the boiler jacket.
  • the silenced, or a silenced housing 29 suction fan unit 3 has a lying suction fan 30 within the housing 29 and a directly adjacent, lying blower motor 31, which are arranged vertically one above the other in such a way that the blower motor 31 immediately above the foot part 4 and the suction blower 30 lies above the blower motor 31, a substantially horizontal partition being provided between these two units.
  • the blower motor 31 is drive-connected to the suction fan 30 via a single-stage transmission gear 32, this gear 32 being located in the housing 29 on the side of the suction blower 30 and the blower motor 31 remote from the main container 2.
  • the suction fan 30 sucks axially on its side facing the main container 2, the suction channel 21 being connected to this side via a pipe bend.
  • This Suction channel 21 is directly adjacent to the main container 2 through a sleeve upwards out of the top of a connection housing 33, which lies between the housing 29 and the main container 2 and is adapted to its circumference so that it surrounds it on a partial circumference.
  • a connection housing 33 which is also hidden the connection line 28 which is connected to a motor protection switch 34 which is fastened laterally on the outside of the connection housing 33.
  • the upper end of the suction channel 21 also has a pipe bend for easily detachable connection to the associated push-in sleeve 19, the suction channel 21 being formed between the two pipe bends by an essentially straight, vertical, flexible hose.
  • the main container 2 or the boiler 7 can be arranged on the foot part 4 in an easily removable manner, so that it can be tipped over separately from the foot part 4 for emptying.
  • suitable carrying handles are provided on the outside of the boiler 7 or the filter housing 8.
  • the main container 2 or the boiler 7 can, however, also be mounted directly on the foot part 4, for which purpose a joint 35 is expediently provided between the boiler 7 and the foot part 4, the horizontal joint axis of which is approximately at the level of the bottom or the bottom of the boiler 7 on its side facing away from the suction fan unit 3 and slightly outside the outer circumference of the boiler 7.
  • the main container 2 or the boiler 7 can furthermore be mounted both pivotably and removably, for which purpose the hinge pin of the hinge 35 is expediently arranged to be lifted out of the hinge bearing.
  • the foot part 4 suitably consists essentially of a horizontal tubular frame which projects laterally beyond the outer circumference of the main container 2 so that it forms a shock protection, the joint 35 being provided at the front end of this lying tubular frame and slightly above its upper side.
  • FIGS. 3 to 5 the same reference numerals are used for corresponding parts as in FIGS. 1 and 2, but in FIGS. 3 and 4 with the index "a” and in FIG. 5 with the index "b".
  • the suction fan unit 3a is arranged directly on the upper side of the main container 2a in such a way that it projects at least a little way down into the sheet metal boiler 7a and a cover 14a of the main container which can be easily released with quick-release fasteners forms.
  • the suction fan unit 3a has an essentially centrically symmetrical housing 29a, which projects with a housing jacket tapering downwards at an acute angle in the shape of a truncated cone into the boiler 7a over a small part of its overall height and with its lower end, which is formed by an annular collar 21a, namely with its suction opening 18a, the suction outlet of the suction chamber 6a forms.
  • the suction fan 30a which extends approximately to the suction opening 18a and above which the fan motor 31a, on whose motor shaft 32a the fan rotor of the suction fan 30a is arranged, are arranged axially one behind the other and to form an assembly.
  • the suction fan unit 3a Immediately above the upper end of the main container 2a forming the boiler opening the suction fan unit 3a has an exhaust air discharge jacket 15a which forms a longitudinal section of the housing 29a. The entire suction fan unit 3a can be lifted or detached from the boiler 7a.
  • the filter housing 8a coaxially projecting freely downwards is detachably or removably attached.
  • the jacket of this filter housing 8a which extends downwards and upwards beyond the suction opening 18a, is formed by a relatively coarse wet filter 12a, for example a fine-meshed wire mesh, which is plugged from below onto a connection jacket 33a and secured, for example, with screws is.
  • the support jacket 33a can, in particular releasably, be fastened to the boiler 7a or else outside of the outer circumference of the conical housing connector on the suction fan unit 3a.
  • the essentially flat, disc-shaped bottom 13a of the filter housing 8a is completely closed, so that liquid reaching it below the suction opening 18a can only reach the pre-separating space 9a radially from the inside out through the wet filter 11a.
  • the suction inlet 17a provided for the connection of the flexible suction hose to a push-in sleeve 19a lies within the filter housing 8a, a connecting sleeve between the push-in sleeve 19a and a suction head forming the suction inlet 17a radially penetrating the boiler 7a and the filter housing jacket or the wet filter 11a.
  • the suction inlet 17a is located directly adjacent to the inside of the filter housing jacket, its central axis determining the entry direction of the suction material being oriented approximately tangentially to the central axis of the suction opening 18a or the main container 2a coaxial therewith and approximately horizontally such that the suction inlet 17a is radial at a small distance lies outside the suction opening 18a.
  • the central axis of the Suction inlet 17a is approximately at the height or only slightly below the suction opening 18a.
  • the filter chamber 22a thus lies within the wet filter 14a, while the filter space 10a acted upon by the filtered suction material surrounds the filter housing 8a in the form of a jacket.
  • the membrane switch 26a in the present case is fixed in position on the wall of the boiler 7a, whereby it can be arranged completely on the inside of this wall or penetrating it in the manner of a cover, for example in such a way that a housing flange 37 protruding from the outer circumference on the inside of the latter Wall is applied.
  • the membrane switch 26 has an essentially cylindrical switch housing 36 which is several times smaller in length than its outer diameter and at the front end of which the housing flange 37 projects in a ring shape.
  • the front end face of the cup-shaped switch housing 36 is closed with an elastic membrane 38 that extends almost over its entire diameter, the peripheral edge of which is stretched against the front end face of the switch housing 36 with an annular disk-shaped tensioning member 39.
  • a plunger 40 On the inside of the membrane 38, which is otherwise convexly curved inside its edge without contact, a plunger 40, which is provided approximately in the membrane axis and is axially movable with the membrane, is fastened by means of a plug-in connection which, with its end facing away from the membrane 38, contacts the contact within the Housing 36 liquid-tight microswitch 41 acts.
  • the switch housing 36 is closed at the rear with a sealed cover 55, the fastening screws 56 of which are sealed with ring seals 57.
  • the plunger 40 works against a compression spring 58 acting on a shift lever, which is arranged on an adjusting spindle and with a nut Opening the housing 36 is adjustable. This actuator can also be led out of the switch housing 36 or the boiler in a sealed manner and thus be accessible at any time.
  • the electrical supply line 28 for the microswitch 41 is guided approximately radially at the top by a screw connection 54 from the switch housing 36, according to FIG. 3 above the switch housing 36 and above the base 13a adjacent to the wet filter 11a through a grommet 43 from the boiler 7a led out and extends from the spout 43 outside of the boiler 7a upwards to a connection base 34a, which is provided above the blower blow-out openings on the housing 29a.
  • the feed line 28a is connected to the connection base 34a with a detachable plug-in coupling.
  • the tightly enclosed housing space of the switch housing 36 is connected to the suction chamber 6a via a line, in particular a flexible hose line 42 above the suction opening 18a or in the uppermost region, the upper end, not shown, of the hose line 42 being directed downward on the outside of the wet filter 11a.
  • a line in particular a flexible hose line 42 above the suction opening 18a or in the uppermost region, the upper end, not shown, of the hose line 42 being directed downward on the outside of the wet filter 11a.
  • the connection of the hose line 42 and the cable bushing can be provided close to the switch housing 36.
  • At least one suction opening or all suction openings 44 of a return device 23a for the collected liquid opens into the lowermost region, that is to say in the immediate vicinity of the bottom 16a, into the pre-separator space 9a provided as an intermediate store.
  • This feedback device 23a has a pump 45 designed in the manner of a submersible pump, structurally combined with an electric motor 46, on the upper side of which the motor 46 is fastened in an axially aligned arrangement and which has suction openings 44 on its circumference in the lower region.
  • the pump 45 is fixed on the floor 16a in the boiler 7a.
  • the electric motor 46 is supplied with power via a power cord which is led away from the top of the feedback device 23a below the bottom 13a across the boiler 7a and which is led out of the boiler 7a at about the height of the spout 43 and is connected to the connecting base 34a with a detachable plug-in coupling .
  • a float switch 47 is arranged in the electrical feed line to the electric motor 46, which is connected via a flexible, insulated cable, which is led out at the top from the return device 23a, and is located below a cable bearing 52, which accommodates the cable and is approximately horizontal, perpendicular to the cable Axis is rotatably mounted on the outside of the feedback device 23a.
  • the float switch 47 stands on the floor 16a next to the feedback device 23a opposite the membrane switch 26a.
  • the float switch 47 floats to a predetermined position, pivoting in a precisely defined manner about the axis of rotation of the cable holder 52.
  • the float switch 47 is closed, so that the electric motor 46 is switched on until the liquid level has dropped to a predetermined lower level by pumping off the liquid in the pre-separation chamber 9a, so that the pump 45 is switched off again.
  • the outlet opening of the pump 45 which is located above or above the electric motor 46, is connected to the lower end of a pressure line 49 which is led upwards in the pre-separating space 9a and consists essentially of three adjoining, angular pipe elbows and below the bottom 13a of the filter housing 8a through the jacket of the boiler 7a is led to the outside.
  • the pressure line 49 is provided with a hose connection coupling 50 fastened to the jacket of the boiler 7a, of the type which is customary for the connection of fire hoses.
  • This connector 50 is, based on the direction of travel of the chassis 4a, on the side of the boiler 7a.
  • a check valve 51 is arranged, which closes under vacuum on the side facing the pump 45, so that in this case no liquid or no air through the Pump 45 can flow back into the pre-separation chamber 9a. If the return device 23a cannot pump off as much liquid as flows in via the suction inlet 17a and the liquid level rises above a predetermined level below the bottom wall 13a, for example in such a way that the membrane switch 26a is almost completely immersed in the liquid, then the blower motor 31a switched off via the microswitch 41 while the feedback device 23a continues to pump.
  • the microswitch 41 and thus the blower motor 31a are automatically switched on again via the membrane 38.
  • the connected suction hose can work continuously without an additional operator for the switching operations, because an automatically regulated disposal device is provided for the suction chamber.
  • the main container 2a can only be connected to the chassis 4a via a plug connection 35a, so that it can be lifted off the latter.
  • the embodiment according to FIGS. 3 and 4 is particularly suitable for use as a fire-fighting vacuum cleaner
  • the embodiment according to FIG. 5 is particularly suitable as a cleaning device for swimming pools or the like, as described in DE-OS 34 10 817 is described.
  • the wire mesh or the like provided in the area of the filter housing 8b expediently serves on the inside for supporting a waterproof, fine wet filter, which can consist of a paper flow or the like in the form of a flexible or approximately cylindrical filter bag in the expanded state, and the like Width is only slightly larger than the clear width of the filter housing 8b.
  • the wet filter provided as a disposable filter is interchangeably arranged and penetrated by the inlet connection.
  • the membrane switch 26b of the fill level limiting device 25b is arranged essentially axially parallel or coaxially to the boiler 7b and to the suction opening 18b within the filter housing 8b.
  • the membrane 38b provided on the underside of the switch housing 36b lies slightly above the bottom 13b of the filter housing 8b, and the upper side of the switch housing 36b formed by the rear side is spaced below the suction opening 18b, the outer diameter of the switch housing 36b being at least the same size or only slightly can be smaller than the width of the suction opening 18b.
  • the membrane switch 26b can be fastened directly to the housing 29b or to its housing part located in the boiler 7b, for example with a holder 53, which has a ring surrounding this housing part and support rods projecting downward therefrom, at the lower ends of which the switch housing 36b with its Housing flange is attached.
  • the response sensitivity of the membrane switch 26b is expediently provided such that the switching process is triggered when the water level has risen to the upper region of the switch housing 36b.
  • the membrane switch 26b thus prevents the water from rising above a predetermined limit value within the filter chamber 22b as well as within the pre-separation chamber 9b, so that for this, although also conceivable, no separate membrane switch according to FIGS. 3 and 4 has to be provided.
  • a suction hose with one end is connected to the plug-in sleeve 19b, which is provided at the other end with a suitable suction or pool cleaning head.
  • a hose of sufficient length that is sinkable in water is connected to the hose connection coupling of the pumping or return device 23b.
  • the cleaning device is set up with the chassis 4b next to the pool edge of the swimming pool, the sinkable hose is drained into the water-filled pool, and the suction head is also sunk in the pool water.
  • a negative pressure is built up in the suction chamber 6b with the check valve 51b closed, through which the contaminated water is sucked into the wet filter through the suction inlet 17b and, after flowing through the wet filter, is collected from the inside to the outside in the pre-separating space 9b .
  • the return device 23b is switched on, so that it pumps the collected water against the negative pressure in the boiler 7b and therefore with the assistance in maintaining or increasing this negative pressure while opening the check valve 51b and that Pools returns.
  • the pressure compensation for the filter housing 36b takes place via the hose line 52b, which could also accommodate the electrical supply cable 28b if the internal width is sufficiently large, so that only a single passage in the switch housing 36b and in the housing 29b would be required.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Cleaning In General (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
EP87118734A 1987-07-30 1987-12-17 Aspirateur pour liquide Withdrawn EP0301132A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873725204 DE3725204A1 (de) 1987-07-30 1987-07-30 Nasssauger
DE3725204 1987-07-30

Publications (1)

Publication Number Publication Date
EP0301132A1 true EP0301132A1 (fr) 1989-02-01

Family

ID=6332670

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87118734A Withdrawn EP0301132A1 (fr) 1987-07-30 1987-12-17 Aspirateur pour liquide

Country Status (3)

Country Link
US (1) US4976850A (fr)
EP (1) EP0301132A1 (fr)
DE (1) DE3725204A1 (fr)

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WO1997000365A1 (fr) * 1995-06-14 1997-01-03 Timothy Kevin Worthington Isolation des piscines
FR2969721A1 (fr) * 2010-12-23 2012-06-29 Fontaine Piscines Dispositif de vidange soufflant et procede de vidange par soufflage

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DE4230077A1 (de) * 1992-09-09 1994-03-10 Akzo Nv Polysulfonmembran und Verfahren zu deren Herstellung
US5632468A (en) * 1993-02-24 1997-05-27 Aquatec Water Systems, Inc. Control circuit for solenoid valve
US5378354A (en) * 1993-11-09 1995-01-03 The Spencer Turbine Company Article/liquid separator
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US6079076A (en) * 1997-07-31 2000-06-27 Shop-Vac Corporation Vacuum cleaner collection bag
US6110248A (en) * 1998-08-31 2000-08-29 Shop Vac Corporation Dual filter assembly for a vacuum cleaner
US6219880B1 (en) 1998-09-17 2001-04-24 Pullman-Holt Corporation Vacuum cleaner
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GB2367511B (en) * 2000-07-06 2003-12-17 John Herbert North Improved dust/particle collecting arrangement for cyclone separators
DE10335531A1 (de) * 2003-07-31 2005-02-24 Hartmut Wrede Vorrichtung zum Aufsaugen von Flüssigkeiten
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US8153001B2 (en) 2009-09-15 2012-04-10 Exair Corporation Liquid vacuuming and filtering device and method
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US9194094B1 (en) * 2012-05-31 2015-11-24 Carl A. Sobel Oil collection assembly
US20140061107A1 (en) * 2012-09-04 2014-03-06 Don M. Buckner Dewatering system
US10219663B2 (en) * 2016-07-25 2019-03-05 Samuel Dale Fox Vacuum-assisted-pumping system and method
GB2601141A (en) * 2020-11-19 2022-05-25 Black & Decker Inc A wet-dry vacuum device assembly and pump accessory therefor
EP4000488A1 (fr) 2020-11-19 2022-05-25 Black & Decker Inc. Ensemble dispositif d'aspiration humide-sèche et accessoire de pompe associé

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US3296395A (en) * 1964-06-12 1967-01-03 United Carr Inc Adjustable vacuum switch
DE2227935A1 (de) * 1972-06-08 1973-12-20 Rolf Reichert Sauggeraet insbesondere fuer industrielle zwecke
DE2835473A1 (de) * 1978-08-12 1980-02-21 Gerhard Kurz Vorrichtung zur anzeige eines auf eine druckaenderung zurueckgehenden zustands
EP0155502A2 (fr) * 1984-03-23 1985-09-25 ESTA Apparatebau GmbH & Co. KG Appareil de nettoyage pour piscines ou des choses pareilles
EP0187938A1 (fr) * 1984-12-17 1986-07-23 Siemens Aktiengesellschaft Dispositif d'affichage logé dans le boîtier d'un aspirateur et indicant le taux de remplissage du filtre collecteur de poussières

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997000365A1 (fr) * 1995-06-14 1997-01-03 Timothy Kevin Worthington Isolation des piscines
FR2969721A1 (fr) * 2010-12-23 2012-06-29 Fontaine Piscines Dispositif de vidange soufflant et procede de vidange par soufflage
EP2469095A3 (fr) * 2010-12-23 2012-12-26 Fontaine Piscines Dispositif de vidange soufflant et procédé de vidange par soufflage

Also Published As

Publication number Publication date
US4976850A (en) 1990-12-11
DE3725204A1 (de) 1989-02-09

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