EP3930556A1 - Appareil d'aspiration pourvu de sondes de niveau de liquide - Google Patents

Appareil d'aspiration pourvu de sondes de niveau de liquide

Info

Publication number
EP3930556A1
EP3930556A1 EP20706459.3A EP20706459A EP3930556A1 EP 3930556 A1 EP3930556 A1 EP 3930556A1 EP 20706459 A EP20706459 A EP 20706459A EP 3930556 A1 EP3930556 A1 EP 3930556A1
Authority
EP
European Patent Office
Prior art keywords
elastic element
suction
flexurally elastic
fixing point
suction device
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.)
Pending
Application number
EP20706459.3A
Other languages
German (de)
English (en)
Inventor
Roman Podhorny
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.)
Alfred Kaercher SE and Co KG
Original Assignee
Alfred Kaercher SE 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 Alfred Kaercher SE and Co KG filed Critical Alfred Kaercher SE and Co KG
Publication of EP3930556A1 publication Critical patent/EP3930556A1/fr
Pending legal-status Critical Current

Links

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
    • 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
    • A47L5/36—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back
    • A47L5/365—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back of the vertical type, e.g. tank or bucket type
    • 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
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2805—Parameters or conditions being sensed
    • 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
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2836—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means characterised by the parts which are controlled
    • A47L9/2842—Suction motors or blowers

Definitions

  • the invention relates to a suction device, comprising a suction material container with an interior space, and a measuring device for a liquid level in the suction material container.
  • TW 201318592 Al discloses a suction device.
  • US 2011/0119950 A1 discloses a liquid suction device.
  • US 2009/0266442 A1 discloses a device for determining a filling level of a container.
  • US 2002/0042965 Al discloses a vacuum cleaner with a humidity sensor.
  • DE 10 2013 008 628 A1 discloses a suction device with a level detection device for detecting the level of a dirt substance in a dirt collecting space, the level detection device having at least one capacitive sensor with at least one electrically chargeable measuring electrode assigned to the dirt collecting space, wherein an electrical capacitance of the at least one capacitive sensor can be changed by the dirt substance in the dirt collecting space.
  • the invention is based on the object of providing a suction device of the type mentioned at the outset in which a liquid level can be detected in a simple manner.
  • the measuring device has at least one first flexurally elastic element and a second flexurally elastic element, the second flexurally elastic element being spaced from the first flexurally elastic element, and that the first flexurally elastic element and the second flexible elastic element protrude into the interior of the suction material container.
  • Element can be detected, for example, via a voltage drop, whether there is liquid between the first flexible element and / or the second flexible element.
  • a flexurally elastic design of the first flexible element and the second flexible element can be used to achieve a self-cleaning effect. If the corresponding flexurally elastic element is deflected and you let it snap back into its starting position, incrustations and the like can be loosened.
  • a probe device with the flexible elements can be designed with little space requirement. Furthermore, for example, an air flow for suction operation is only minimally influenced by the probe device.
  • first flexurally elastic element and / or the second flexurally elastic element are movable and have an initial position, the first flexurally elastic element in the event of a deflection from the initial position Element and / or the second flexurally elastic element return to the starting position by themselves, wherein in particular the first flexurally elastic element and / or the second flexurally elastic element are resiliently arranged and / or formed. In this way, an automatic self-cleaning effect can be achieved in a simple manner.
  • first flexurally elastic element and / or the second flexurally elastic element are designed as a line element and are in particular designed in the form of a rope, wire or thread. This results in a small footprint.
  • the liquid level can be reliably determined in particular with regard to a threshold value.
  • An air flow in suction mode is minimally influenced by the flexible elements.
  • the first flexurally elastic element is held hanging at a first fixing point and a second fixing point
  • / or the second flexurally elastic element is held hanging at a first fixing point and a second fixing point.
  • an intermediate space can be formed through which air can flow.
  • An air flow in suction mode is only minimally influenced by the flexible elements.
  • first flexurally elastic element is freely suspended between the (its) first fixation point and the (its) second fixation point and / or the second flexurally elastic element is freely suspended between the (its) first fixation point and the (its) second fixation point is.
  • first flexurally elastic element between the first fixation point and the second fixation point is formed in an arc shape and / or the second flexurally elastic element is formed in an arc shape between the (its) first fixation point and the (its) second fixation point.
  • a relatively large measuring range can be achieved in this way. It a free space can be provided through which air can flow. As a result, the suction flow is only minimally influenced by the flexible elements. The risk of damage to the flexible elements can be kept low.
  • a distance between the first fixing point and the second fixing point is at least 2 cm, especially at least 4 cm, especially at least 6 cm, especially at least 8 cm, especially at least 10 cm, especially at least 12 cm, especially at least 14 cm and especially at least 16 cm.
  • a distance direction between the first fixing point and the second fixing point is oriented transversely to a height direction of the suction device (and for example transversely or parallel to a wheel axis); the distance direction is oriented transversely to a wheel axis of a wheel device; the distance direction is parallel to a longitudinal axis of the suction device; the direction of distance is oriented parallel to a longer side of the suction device; This results in a simple determination of the liquid level in the suction material container.
  • the first fixing point lies in the area of a first end of the first flexible element and / or the second flexible element
  • the second fixing point is in the region of a second end of the first flexible elastic element and / or the second flexible elastic element.
  • a probe device can be designed in a simple manner and fixed to the suction device.
  • first flexurally elastic element and the second flexurally elastic element are spaced apart from one another in a direction which is transverse to a height direction of the suction device and / or is parallel to a wheel axis of a wheel device and / or perpendicular to a longitudinal axis of the suction device is. In this way, a liquid level determination can be carried out in a simple manner.
  • a suction head is provided which is detachably arranged on the suction material container. This makes it easier to access the suction material container for emptying and cleaning.
  • first flexible element and / or the second flexible element are held on the suction head.
  • an electrical connection to an evaluation device for example, can be permanent. It is thereby also possible, when the suction head is set down, to achieve an automatic deflection of the flexible elements in order to then be able to carry out a self-cleaning effect.
  • first flexible element and / or the second flexible element may be held on the suction material container.
  • a flexible element on the suction head and the other flexible element on the suction material container are held th.
  • the suction head has a set-up area to which a set-up level is assigned, the suction head being able to be placed over the set-up area when it is separated from the suction material container, and the first flexible element and / or the second flexible elastic element being on the set-up level or protrude beyond them.
  • a deflection of a flexible element or at least contact with a base can be achieved. This allows a deflection or mechanical contact to be achieved in order to carry out a self-cleaning effect. If, for example, the suction head is then lifted when it is deflected, a corresponding flexible element can snap back and, for example, encrustations can thereby be loosened.
  • first flexurally elastic element and / or the second flexurally elastic element are oriented at an acute angle (in a starting position) to a height axis of the suction device, a distance between tween the first flexurally elastic element and the second flexurally elastic element of one Fixation point reduced away.
  • This provides an insertion aid.
  • the flexible elements are arranged on the suction head, then this can be placed more easily on the suction material container. In this way, it can also be achieved, if the flexible elastic elements protrude beyond an installation plane of the suction head, that they bend away from a side wall to an inside.
  • the first flexurally elastic element and the second flexurally elastic element are advantageously designed as electrical conductors. A voltage can thus be applied between them. A change in voltage can be detected, in particular when a liquid medium passes between the first flexible element and the second flexible element.
  • the measuring device comprises a loading device which acts on the first flexible elastic element and the second flexible elastic element with an application signal, and the measuring device comprises a determination device which determines a reaction signal to the application signal, the reaction signal being dependent on the medium between the first flexurally elastic element and the second flexurally elastic element.
  • the reaction signal contains the information about the liquid level.
  • the application signal is a voltage signal for a voltage which is applied between the first flexurally elastic element and the second flexurally elastic element
  • the reaction signal is a voltage signal. If a voltage is applied to the flexible elements and there is air between them, there is no current flow. If there is liquid between the flexible elements, a current can flow and, for example, a short-circuit current can flow. This reduces a tension and this
  • Change in voltage can be detected. From the voltage change it can be determined whether a threshold value for a liquid level has been reached, and in particular whether the liquid level has reached the probe device with the flexible elements.
  • the measuring device is connected to a control device in a signal-effective manner, with at least one of the following: when a certain liquid level is reached, the control device switches off a suction mode; when a certain liquid level is reached, a display appears; when a certain liquid level is reached, suction mode is blocked. This prevents the suction device from being flooded by switching it off in good time or by not being able to restart it.
  • a visual and / or acoustic display is advantageously used to indicate to an operator that the suction material container must be emptied.
  • the suction device is designed, for example, as a stand-alone device and in particular as a wet-dry suction device. The result is an effective suction operation.
  • Figure 1 is a schematic sectional view of an embodiment of a suction device according to the invention.
  • FIG. 2 shows a sectional view along the line 2-2 according to FIG. 1;
  • FIG. 3 shows an enlarged illustration of area A according to FIG. 1;
  • FIG. 4 shows a sectional view along the line 4-4 according to FIG. 3;
  • FIG. 5 shows a sectional view along the line 5-5 according to FIG. 3;
  • FIG. 6 shows a sectional view along the line 6-6 according to FIG. 3;
  • FIG. 7 shows a sectional view along the line 7-7 according to FIG. 3;
  • FIG. 8 shows an enlarged illustration of the area B according to FIG. 3;
  • FIG. 9 shows an enlarged illustration of the area C according to FIG. 3;
  • FIG. 10 shows an embodiment of a channel piece in plan view;
  • FIG. 11 shows a sectional view along the line 11-11 according to FIG. 10;
  • FIG. 12 shows a perspective illustration of the channel piece according to FIG. 10
  • FIG. 13 shows a further sectional view of the suction device according to FIG. 1;
  • FIG. 14 shows an enlarged illustration of the area D according to FIG. 13;
  • FIG. 15 a sectional view along the line 15-15 according to FIG. 13;
  • FIG. 16 shows an enlarged illustration of the area E according to FIG. 15;
  • FIG. 17 shows a representation similar to that in FIG. 16 in a variant.
  • FIG. 18 schematically a measuring device for determining a liquid level.
  • FIG. 20 An embodiment of a suction device according to the invention, which is shown in the figures and denoted by 20, is formed as a stand-alone suction device.
  • the suction device 20 is designed in particular as a wet-dry vacuum cleaner that can suck in liquids and dust.
  • the suction device 20 comprises a suction material container 22.
  • the suction material container 22 has a base 24 and a wall 26.
  • the wall 26 and the base 24 delimit an interior space 28.
  • the interior space 28 can accommodate suction material. It is also possible that a suction material bag can be positioned in the interior space 28 (for dry suction operation).
  • the suction material container 22 and thus the suction device 20 are designed to be mobile.
  • a wheel device 30 On the suction material container 22 is a wheel device 30 arranged.
  • a wheel axle 32 is oriented transversely to the drawing plane in FIG.
  • a steerable roller 34 is positioned on the suction material container 22 or a plurality of steerable rollers 34 are positioned.
  • a suction head 36 is seated on the suction material container 22.
  • the suction head 36 can be removed from the suction material container 22 in order to enable access to the interior space 28, in particular in order to be able to empty and clean the interior space 28.
  • a fixing device 38 is provided, via which the suction head 36 can be fixed on the suction material container 22.
  • the suction device 20 has a height axis 40 which extends from the suction material container 22 to the suction head 36.
  • the height axis 40 lies transversely and in particular perpendicular to the wheel axis 32.
  • this height axis is perpendicular to this base 42.
  • a suction connection 44 is assigned to the suction material container 22.
  • the suction port 44 is positioned on the suction head 36.
  • a suction hose 46 can be connected to the suction connection 44.
  • a pipe element 46 which is in particular curved, leads from the suction connection 44 into the interior space 28.
  • the pipe element 46 has a connecting piece 48 which protrudes into the interior space 28. It is also possible for the suction connection 44 to be arranged directly on the suction material container 22.
  • a corresponding opening connection of the suction material bag can be pushed onto the connecting piece 48.
  • the suction device 20 comprises a suction unit device 50 for generating a suction flow.
  • This suction flow acts on the interior space 28 of the suction material container 22.
  • a suction can be achieved via this suction flow.
  • the suction flow is applied to the suction connection 44. In Figure 1 it is indicated by a double arrow.
  • the suction device 20 has a filter device 52.
  • the filter device 52 is arranged such that it can be removed from the suction head 36, for example.
  • the filter device 52 has a clean side 54 and a dirty side 56.
  • the dirt side 56 faces the interior 28 of the suction material container 22.
  • the suction flow flows through the filter device 52 and the suction flow is cleaned by the filter device 52. Starting from the clean side 54 of the filter device 52, the suction flow is not contaminated with dirt.
  • a cleaning device 58 for the filter device 52 is arranged on the suction head 36. This allows the filter device 52 to be cleaned. For example, the cleaning device 58 generates blasts of air, which cause dirt particles adhering to the filter device 52 to fall into the interior space 28 of the suction material container 22.
  • the suction unit device 50 comprises a fan 60 with a fan motor 62.
  • the fan 60 has an impeller 64 which is driven in rotation by the fan motor 62.
  • the fan motor 62 has a motor axis 66 which is coaxial with an axis of rotation for the impeller 64.
  • the motor axis 66 is oriented at an acute angle 68 to the height axis 40.
  • the acute angle 68 is approximately 65 °.
  • the motor axis 66 may be oriented, for example, parallel to the height axis 40.
  • the suction device 20 has a guide device, designated as a whole by 70, for process air.
  • This guide device 70 for process air is arranged on the suction head 36. Process air is fed through them to the suction head 36 and discharged as process air exhaust air. This guided process air is air purified by the filter device 52. In the case of wet operation of the suction device 20, it can in principle be exposed to liquid.
  • a fan holder 72 is arranged on the suction head 36. This fan holder 72 forms a base plate for fixing the fan motor 62.
  • the fan motor 62 is integrated with the fan 60;
  • the fan motor 62 and the fan 60 in particular have a common housing 74 in which motor elements such as the stator and rotor are arranged and in which the impeller 64 is arranged.
  • the fan holder 72 then holds the fan 60 with the fan motor 62.
  • a receptacle 76 for the fan 60 / the fan motor 62 is arranged or formed.
  • the guide device 70 for process air has one or more channels 78 which lead from the clean side 54 of the filter device 52 to the fan 60.
  • a duct piece 80 is arranged on the fan holder 72 and the fan 60 / the fan motor 62.
  • This duct piece 80 has a duct 82 which is connected to the fan on the exhaust air side. Process air exhaust air can be emitted to the surroundings of the suction device 20 via this channel 82.
  • the duct piece 80 is arranged and designed in such a way that it is positioned on the input side with respect to the fan 60. This is explained in more detail below.
  • the channel piece 80 is formed in one piece or in one piece. It is designed, in particular, in such a way that during the manufacture of the suction device 20 it is a unit that can be handled as a whole and, in particular, can be fixed as a whole on the suction head 36. It is an object of the channel piece 80 to provide the channel 82 of the guide device 70 for process air for discharging exhaust air.
  • the channel piece 80 continues to have a sealing function and also a storage function.
  • the material for the channel piece 80 is selected accordingly.
  • the channel piece is made from a single material.
  • the channel piece is made from a vulcanized rubber material such as EPDM (ethylene-propylene-diene rubber).
  • EPDM ethylene-propylene-diene rubber
  • the channel piece 80 is made from a thermoplastic elastomer (TPE).
  • TPE thermoplastic elastomer
  • the duct piece 80 is arranged on the fan holder 72. It is also arranged on the fan 60 / the fan motor 62. Furthermore, a hood 84, which is assigned to the fan motor 62, on the channel piece 80 is arranged.
  • the channel piece 80 has a track region 86 on which the channel 82 is formed. This path area 86 has a wall 88 which delimits the duct 82 to the outside, from the fan 60 / the fan motor 62.
  • the channel piece 80 is opposite the wall 88 open. Another wall 90 for closing the channel 82 is formed by the fan 60 / the fan motor 62 and thereby by the housing 74.
  • the path area 86 has a path course with a course about an axis which is coaxial to the motor axis 66. This is understood to mean that a corresponding path course of the path region 86 can be represented by polar coordinates, with the motor axis 66 forming the pole. The corresponding trajectory can be represented by the distance from the pole (from the motor axis 66) and a polar angle.
  • the course of the path in the path area 86 is circular.
  • a path of the wall 88 is spiral.
  • the underlying spiral is, for example, an Archimedean spiral or a logarithmic spiral.
  • the track area 86 is then formed in particular as a volute.
  • a diameter 92 of the channel 82 steadily widens towards an outlet 94 of the channel piece 80.
  • the channel 82 is circular in cross section and the outlet 94 has a circular cross section (see also FIG. 12, for example).
  • the channel piece 80 has (compare FIGS. 10 to 12) a first opening 96 and a second opening 100 spaced apart in the axial direction 98.
  • the axial direction 98 is coaxial with the motor axis 66.
  • the first opening 96 and the second opening 100 are parallel to each other. They are oriented transversely and, in particular, perpendicular to the axial direction 98.
  • the first opening 96 and the second opening 100 are each delimited to the outside by the wall 88.
  • the channel piece 80 is open inward. This results in an easier connection to the fan 60.
  • the channel piece 80 has a first partial area 102.
  • the first partial area 102 surrounds the first opening 96 and forms a wall for the first opening 96.
  • the channel piece 80 also has a second partial area 104.
  • the second partial area 104 surrounds the second opening 100 and forms a wall for the second opening 100.
  • a third partial area 106 of the channel piece 80 is arranged between the first partial area 102 and the second partial area 104. This third sub-area 106 forms the wall 88 as an outer wall for the channel 82.
  • the first sub-area 102 is supported with a first side 108 (compare, for example, FIGS. 8, 9) on the fan holder 72.
  • the fan 60 / fan motor 62 is supported on a second side 110 of the first partial area 102 opposite the first side 108.
  • the first sub-area 102 is thereby positioned between the fan 60 / the fan motor 62 and the fan holder 72.
  • the channel piece 80 forms a first sealing device via the first sub-area 102. This seals the fan motor 62 / the fan 60 from the duct 82.
  • the first opening 96 which is formed by the first partial region 102, is designed as a connection, or receives a connection via which the Channel 82 is closed on the input side to the fan 60 based on the process air.
  • the first sub-area 102 of the duct section 80 also ensures that the fan 60 / fan motor 62 is mounted in a floating manner on the fan holder 72.
  • the first opening 96 has a first area 112, which ensures the connection of the channel 82 to the fan 60.
  • the first opening 96 also has a second region 114, on which the second side 110 lies, and which adjoins the first region 112 in the axial direction 98.
  • the second area 114 has a larger diameter than the first area 112.
  • a support surface 116 is formed on the second side 110, on which the fan 60 / the fan motor 62 is supported.
  • the support surface 116 has a first contact surface 118 and a second surface 120.
  • the first contact surface 118 is used to axially support the fan 60 / the fan motor 62 in relation to the axial direction 98.
  • the second contact surface 120 also serves to provide radial support in the radial direction transverse to the axial direction 98.
  • the first contact surface 118 and the second Contact surface 120 go continuously into one another.
  • the corresponding bearing surface which is formed by the first contact surface 118 and the second contact surface 120, is annular.
  • the fan 60 / the fan motor 62 is positioned and held in the second area 114.
  • the fan 60 / the fan motor 62 with the hood 84 is positioned in the first opening 96.
  • the first partial region 102 has a shoulder 122 on its outside.
  • the receptacle 76 in the suction head 36 has a (counter) shoulder 124 which is adapted to the shoulder 22 and on which the shoulder 122 of the channel piece 80 rests.
  • the counter shoulder 124 forms a second receptacle for the channel piece 80 on the suction head 36.
  • the second sub-area 104 has a first web 126, which extends essentially parallel to the axial direction 98 and points in the direction of the second sub-area 104.
  • the housing 74 has a groove 128.
  • the first web 126 is immersed in this annular groove 128.
  • a receptacle 130 is formed on the channel piece 80, which is for example a groove. This receptacle 130 is formed between the first sub-area 102 and the third sub-area 106.
  • a wall area 132 of the housing 74 of the fan 60 / of the fan motor 62 is immersed in this receptacle 130, this wall area 132 delimiting the groove 128.
  • a wall region 134 of the hood 84 is also immersed in the groove 128, the first web 126 lying between the wall region 134 of the hood 84 and the wall region 132 of the fan 60 / of the fan motor 62.
  • the first web 126 and in particular the second sub-area 104 forms a fluid seal between the hood 84 and the fan 60 / the fan motor 62.
  • hood 84 it is also possible for the hood 84 to be mounted on the fan 60 / fan motor 62 in a floating manner over the second partial area 104 of the duct section 80.
  • a second axial sealing device is formed over the second partial area 104 by the channel piece 80, which ensures an airtight seal between the hood 84 and the housing 74.
  • the hood 84 is dome-shaped. In particular, it has an opening 136 coaxial to the motor axis 66 (see FIG. 4).
  • a fan wheel 140 which is assigned to the opening 136, is arranged on a shaft 138 of the fan motor 62.
  • the fan wheel 140 is in particular spaced apart from the impeller 64.
  • the fan wheel 140 rotates about the same axis of rotation as the impeller 64, that is, an axis coaxial with the motor axis 66. Cooling air can thereby be sucked in through the opening 136.
  • the opening 136 is in corresponding connection with a connection on the suction head 36, via which cooling air can be sucked in.
  • the hood 84 surrounds a partial area of the fan motor 62.
  • One or more channels 142 of an air cooling device for the fan motor 62 are formed between it and this partial area.
  • Cooling air sucked in through the opening 136 can flow in the channel or channels 142 and thereby flow around a corresponding housing area 144 of the fan motor 62.
  • An outlet 146 is arranged on the hood 84, to which a pipe 148 is connected, which leads to an outlet 51 for cooling air on the suction head 36 (compare FIG. 2; in FIG. 2, the guidance of cooling air is indicated by a double arrow in broken lines ).
  • a second web 152 or a plurality of second webs 152 are furthermore arranged on the second partial region 104 (compare FIGS. 8, 10, 12).
  • the second web or webs 152 are oriented at least approximately parallel to the axial direction 98.
  • the receptacle 76 on the suction head 36 is assigned a first receptacle 154 (see FIG. 8) into which the second web or webs 152 are at least partially immersed.
  • One or more tabs 156 are arranged on the second partial area 104 of the channel piece 80.
  • a corresponding tab 156 has an opening 158 (see FIG. 7).
  • a counter-element 160 is arranged on the suction head and assigned to the fan holder 72. This is designed in particular as a pin element which is immersed in the opening 158.
  • two tabs 156 and correspondingly two counter-elements 160 are provided.
  • the channel piece 80 can be positioned non-rotatably with respect to the fan holder 72 by fixing the tabs 156 on the corresponding counter-elements 160 and can be correctly aligned.
  • a pipe element 162 leads from the outlet 94 of the channel piece 80 to an outlet on the suction head 36, via which process air exhaust air can be emitted to the surroundings of the suction device 20.
  • channel piece 80 with its outlet 94 it is also possible for the channel piece 80 with its outlet 94 to open directly into the outlet.
  • the channel piece 80 is a multifunctional component, which is implemented in particular in a one-piece component:
  • a connection of the fan 60 to the channel 82 is at least partially formed.
  • the channel piece 80 forms a first sealing device via the first sub-area 102, via which the fan 60 / the fan motor 62 are sealed in a fluid-tight manner with respect to the fan holder 72. Furthermore, the channel piece 80 ensures that no suction stream containing liquid can reach the fan motor 62.
  • the fan 60 / the fan motor 62 is mounted in a floating manner over the first partial area 102 of the duct section 80. In this way, vibration decoupling can be achieved to a certain extent and noise is reduced.
  • the first sealing device is in particular an axial sealing device.
  • channel piece 80 forms a second sealing device via the second partial area 104, via which the hood 84 is fluid-tight on the
  • Fan 60 / the fan motor 62 is mounted. This creates a fluid tightness of the cooling air guide device for cooling the fan motor 62 is achieved.
  • the channel piece 80 is posi tioned in particular radially pressed in the receptacle 76.
  • the fan 60 / the fan motor 62 is in particular axially clamped.
  • a corresponding bracket 162 is provided, which ensures this axial A voltage.
  • the blower motor 62 / the blower 60 can thereby be fixed in the suction head 36 in a simple manner.
  • the suction device 20 can be manufactured in a simple manner. The result is a space-saving arrangement with a high level of fluid tightness.
  • the duct piece 80 is slipped onto the blower 60 with the blower motor 62.
  • Effective flow guidance can also be achieved with low flow resistances via the channel piece 80. This results in a high efficiency for the operation of the suction device 20.
  • the suction device 20 can be manufactured in a simple and inexpensive manner. The number of components can be minimized due to the multifunctional design of the channel piece 80.
  • the suction device 20 comprises a measuring device 164 (in particular FIGS. 13 to 18) for determining a liquid level 166 in the suction material container 22.
  • measuring device 164 is designed as a threshold value device which checks whether a certain threshold value for a liquid level 166 has been reached; In a wet-suction operation of the suction device 20, liquid is sucked in and taken up in the suction material container 22. It should be prevented that the suction device 20 is "flooded".
  • Threshold value for example, a timely shutdown of suction operation can take place via the measuring device 164.
  • the measuring device 164 comprises a probe device 168.
  • the probe device 168 has a first flexurally elastic element 170 and a second flexurally elastic element 172.
  • the first flexurally elastic element 170 and the second flexurally elastic element 172 are spaced apart from one another in a transverse direction 174, which is in particular parallel to the wheel axis 32.
  • the probe device 168 is arranged on the suction head 36.
  • the probe device 168 is arranged on the suction material container 22, or is arranged with a first part on the suction head 36 and with a second part on the suction material container 22.
  • the arrangement of the probe device 168 completely on the suction head 36 has the advantage that electrical components of the measuring device 164 which are arranged in the suction head 36 can be in permanent electrical contact with the probe device 168. If the probe device 168 is arranged on the suction material container 22, a corresponding electrical contact must be ensured when the suction head 36 is placed on the suction material container 22.
  • the first flexurally elastic element 170 and the second flexurally elastic element 172 protrude into the interior space 28 of the suction material container 22 in an operative position when the suction head 36 is placed on the suction material container 22.
  • the first flexurally elastic element 170 and the second flexurally elastic element 172 are each because it is designed as a line element 176. It is wire-shaped, rope-shaped or thread-shaped and made from an electrical conductor.
  • the first flexurally elastic element 170 and the second flexurally elastic element 172 are each held on a holder 182 of the suction head 36 via a first fixing point 178 and a second fixing point 180.
  • the respective flexurally elastic element 170, 172 is freely suspended between the first fixing point 178 and the second fixing point 180.
  • the first fixing point 178 and the second fixing point 180 are at the same height, the fixing points 178, 180 for both flexurally elastic elements 170, 172 being at the same height.
  • the first flexurally elastic element 170 and the second flexurally elastic element 172 have an arc shape between the respective first fixing point 178 and the second fixing point 180.
  • the first fixing point 178 is in the area of a first end 184 of the respective flexible elastic element 170, 172.
  • the second fixing point 180 is in the area of a second end 186.
  • the corresponding flexurally elastic element 170 is fixed on the holder 162 in that a pin element 188 is arranged in the region of its ends 184, 186, which is fixed on the holder 162 and is, for example, pressed in there.
  • the pin element 188 is pressed or glued to the line element 176, for example.
  • the first flexible element 170 and the second flexible element 172 extend in the height axis 40 with a point or area 190 which is a minimal distance from the bottom 24 of the suction material.
  • container 22 has.
  • this area 190 is in particular an apex.
  • the area 190 thus defines the
  • Threshold value for level detection by measuring device 164 is the Threshold value for level detection by measuring device 164.
  • the area 190 is in particular for the first flexurally elastic element 170 and the second flexurally elastic element 172 at the same height in the height axis 40. (Due to the oblique section in FIG. 13, the areas 190 of the flexurally elastic elements 170, 172 appear offset there.)
  • the first fixing point 178 and the second fixing point 180 are spaced apart from one another in a direction 192 at a distance 194.
  • the direction 192 is transverse to the transverse direction 174 and transverse to the height axis 40.
  • the direction 192 is a longitudinal direction of the suction device 20.
  • the suction device 20 has a larger dimension in the direction 192 than in the transverse direction 174.
  • the distance 194 is in particular at least 2 cm, preferably at least 4 cm, preferably at least 6 cm, preferably at least 8 cm and particularly preferably at least 10 cm.
  • the distance 194 is preferably at least 12 cm or at least 14 cm or at least 16 cm.
  • the distance 194 can be selected to be as large as a hanging position of the flexurally elastic elements 170, 172 with protruding into the interior 28 of the suction material container 22 is still possible.
  • a variant 196 is indicated in FIGS. 1 and 15 in which the flexurally elastic element has a greater length, that is, the distance 194 is greater than in the embodiment according to FIG.
  • the first flexurally elastic element 170 and the second flexurally elastic element 172 each have opposing envelopes spaced in parallel and planar 198a, 198b.
  • the line element 176 lies between these envelope planes 198a, 198b.
  • the first flexurally elastic element 170 and the second flexurally elastic element 172 are designed to be so rigid that they have a fixed position, namely the starting position, without force influencing. They are so movably arranged and designed that a deflection from this starting position is possible. This is indicated in FIG. A starting position 200 is shown there for the first flexurally elastic element 170 and 172. The double arrow 202 indicates a deflection with respect to this starting position 200.
  • the flexurally elastic elements 170, 172 are arranged and formed in such a way that when they are deflected from the starting position 200 and when the corresponding deflection force ceases, they automatically return to their starting position 200.
  • these are resiliently arranged and designed in such a way that they snap back into their starting position.
  • the flexurally elastic elements 170, 172 are basically acted upon with dirt-laden liquid. In the process, dirt can settle on the flexible elements 170, 172. If a flexurally elastic element 170, 172 is moved from the starting position 200 and snaps back via the resilient design after the deflection has ceased to exist, then incrustations can become detached from the flexurally elastic element 170, 172 (from the line element 176).
  • the flexurally elastic elements 170, 172 in the starting position 200 are inclined at an acute angle 204 (see FIG. 13) with respect to the height axis 40, a distance 206 between the first flexurally elastic element and the second flexurally elastic element 172 approaching the area 190 reduced.
  • the distance 206 decreases in the direction of the bottom 24 of the suction material container 22.
  • the acute angle 204 is in particular related to the envelope planes 198a, 198b.
  • This provides an insertion aid when the suction head 36 with the probe device 168 is placed on the suction material container 22.
  • first flexurally elastic element 170 and the second flexurally elastic element 172 can be positioned at a relatively large distance in the transverse direction 174 and in particular at the edge on the suction head 36.
  • first flexurally elastic element 170 and the second flexurally elastic element 172 are arranged at the same distance in the direction 192. This same distance in the direction 192 is not absolutely necessary for a mode of operation.
  • the suction head 36 has on its underside (which faces the bottom 24 of the suction material container 22 when the suction head 36 is placed on the suction material container 22) a mounting surface 208 (see FIG. 1) with a corresponding speaking installation level.
  • a mounting surface 208 see FIG. 1 with a corresponding speaking installation level.
  • first flexurally elastic element 170 and the second flexurally elastic element 172 lie in their starting position 200 on the corresponding installation plane for the installation surface 208 or protrude beyond this. (In principle, they can also be reset to this.)
  • the first fixing point 212 lies in the region of an underside of the suction head 36, and the second fixing point 214 lies on the connector 48.
  • a flexurally elastic element 170 is fixed to a holder 216 of the suction head 36, a receptacle 218 being arranged on the holder associated with the first fixing point 178 and the second fixing point 180.
  • the receptacle 218 has a first part 220 in which a screw is positioned. It has a second part 222 through which the flexurally elastic element 170 is passed.
  • the flexurally elastic element can be fixed in the second part 222 via the screw in the first part 220 and in particular clamped in the process.
  • the receptacle 218 is 8-shaped with respect to its openings.
  • the suction device 20 has a control device 224 (FIG. 18) which is arranged in particular in the suction head 36. About the control
  • the fan motor 62 is controlled.
  • the controller 224 is in communication with one or more switches.
  • the control device 224 controls an optical and / or acoustic display 226.
  • the measuring device 164 includes an evaluation circuit 228. This is implemented, for example, in an ASIC.
  • a voltage VccProbe_enable is applied via the evaluation circuit 228 between the first flexurally elastic element 170 and the second flexurally elastic element 172 as an application signal.
  • a falling voltage Voltage In is measured as a reaction signal.
  • first flexurally elastic element 170 and the second flexurally elastic element 172 there is a resistance R_probe due to a medium between them. If there is no liquid between the first flexurally elastic element 170 and the second flexurally elastic element 172, then, idealized, this resistance can be viewed as infinitely large.
  • Corresponding measurement signals are given by the evaluation circuit 228 and the control device 224.
  • the control device 224 then switches off the suction mode by appropriately acting on the fan motor 62.
  • a warning message can be given. It is also possible, for example, that when the corresponding threshold value is detected, it is not possible to restart the suction device 20 for suction operation.
  • the signal VccProbe_enable which is an application signal, is emitted in a pulsed manner so that a measurement does not take place continuously.
  • the signal Voltage In is a corresponding reaction signal and contains at least in digital form the liquid level 166, that is to say whether the threshold value has been reached or not.
  • a probe device 168 is provided which is flexible.
  • the flexurally elastic elements 170, 172 greatly reduce the risk of breaking off.
  • the probe device 168 takes up a relatively small space requirement in the suction material container 22 due to the line elements 176.
  • a flexible design helps with the self-cleaning of the flexible elastic elements 170, 172. Incrustations can then easily be broken off.
  • the self-cleaning effect can also take place automatically when the suction head 36 is placed on the installation surface 208.
  • the first flexurally elastic element 170, 172 are each made of an electrical conductor's rule. They are rope-shaped with a certain inherent rigidity, whereby they can also be made limp. They are made, for example, of a wire material or of a thread or fiber material with conductive fibers such as carbon fibers.
  • the flexurally elastic elements 170, 172 are arranged centrally on the suction device 20 with respect to the direction 192. In particular, they are arranged at a distance from one another in the transverse direction 174. In this way, the reaching of a threshold value for the liquid level can be determined in a simple and reliable manner.
  • a flexurally elastic design of the flexurally elastic elements 170, 172 makes it possible to snap back from the starting position 200 for a self-cleaning effect. Due to the suspension at spaced-apart fixing points 178, 180, air can flow through the flexible elements 170, 172. A suction air flow is not hindered.
  • the probe device 168 can be arranged in such a way that, due to the acute angle 204, an insertion aid for placing the suction head 36 on the suction material container 22 is achieved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • External Artificial Organs (AREA)

Abstract

L'objet de l'invention est de fournir un appareil d'aspiration, comprenant un contenant pour matières aspirées (22) pourvu d'un espace intérieur (28), et un dispositif de mesure (164) pour un niveau de liquide (166) dans le contenant pour matières aspirées (22), lequel dispositif permet de détecter aisément un niveau de liquide. À cet effet, selon l'invention, le dispositif de mesure (164) présente au moins un premier élément élastique en flexion (170) et un deuxième élément élastique en flexion (172), le deuxième élément élastique en flexion (172) étant espacé du premier élément élastique en flexion (170), et le premier élément élastique en flexion (170) et le deuxième élément élastique en flexion (172) faisant saillie dans l'espace intérieur (28) du contenant pour matières aspirées (22).
EP20706459.3A 2019-02-28 2020-02-19 Appareil d'aspiration pourvu de sondes de niveau de liquide Pending EP3930556A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019105189.4A DE102019105189A1 (de) 2019-02-28 2019-02-28 Sauggerät mit Flüssigkeitspegel-Sonden
PCT/EP2020/054391 WO2020173792A1 (fr) 2019-02-28 2020-02-19 Appareil d'aspiration pourvu de sondes de niveau de liquide

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EP3930556A1 true EP3930556A1 (fr) 2022-01-05

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EP20706459.3A Pending EP3930556A1 (fr) 2019-02-28 2020-02-19 Appareil d'aspiration pourvu de sondes de niveau de liquide

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EP (1) EP3930556A1 (fr)
DE (1) DE102019105189A1 (fr)
WO (1) WO2020173792A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3205831A1 (de) * 1982-02-18 1983-08-25 Karl-Heinz 8025 Unterhaching Schmiegel Vakuumfluessigkeitssauger
DE3426993C1 (de) * 1984-07-21 1986-01-09 Rheinische Braunkohlenwerke AG, 5000 Köln Sonde mit kapazitiven Messfuehlern
US6832407B2 (en) * 2000-08-25 2004-12-21 The Hoover Company Moisture indicator for wet pick-up suction cleaner
DE102004053639A1 (de) * 2004-11-04 2006-05-11 Benjamin Hoffmeier Verfahren und Vorrichtung zur füllrichtigen kapazitiven Füllstandsmessung und Qualitätsbestimmung über den gesamten geforderten Temperaturbereich
DE102005060363A1 (de) 2005-12-16 2007-06-21 BSH Bosch und Siemens Hausgeräte GmbH Vorrichtung zur Ermittlung eines Füllstandes eines Flüssigkeitsbehälters eines Gerätes, insbesondere Hausgerätes sowie Füllstandssensor und Detektorschaltung hierfür
TW201117760A (en) 2009-11-25 2011-06-01 Ind Tech Res Inst Puddle eliminating system and puddle eliminating method
TWI463963B (zh) 2011-11-09 2014-12-11 Nat Univ Chin Yi Technology Dry and wet vacuum cleaner
DE102013008628A1 (de) * 2012-05-23 2013-11-28 Festool Group Gmbh & Co. Kg Sauggerät mit einem Sensor
DE202016105301U1 (de) 2016-09-23 2016-10-19 Hizero Technologies Co., Ltd. Bodenreinigungsvorrichtung

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DE102019105189A1 (de) 2020-09-03

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