DE102016124030A1 - Suction device with a filter element - Google Patents

Suction device with a filter element

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Publication number
DE102016124030A1
DE102016124030A1 DE102016124030.3A DE102016124030A DE102016124030A1 DE 102016124030 A1 DE102016124030 A1 DE 102016124030A1 DE 102016124030 A DE102016124030 A DE 102016124030A DE 102016124030 A1 DE102016124030 A1 DE 102016124030A1
Authority
DE
Germany
Prior art keywords
sealing
suction
filter
flow
negative pressure
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
DE102016124030.3A
Other languages
German (de)
Inventor
Steffen DIRR
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.)
Festool GmbH
Original Assignee
Festool GmbH
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 Festool GmbH filed Critical Festool GmbH
Priority to DE102016124030.3A priority Critical patent/DE102016124030A1/en
Publication of DE102016124030A1 publication Critical patent/DE102016124030A1/en
Pending legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00Details 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
    • A47L9/10Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/12Dry filters
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00Details 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
    • A47L9/10Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/12Dry filters
    • A47L9/122Dry filters flat

Abstract

The invention relates to a suction device (10) with a suction unit (20) for generating a suction flow (S) and with a suction housing (11), in which within a negative pressure region (U), in which a negative pressure can be generated by the suction unit, a dirt collecting space (19) for receiving dirt particles contained in the suction flow (S) is arranged, which has a suction inlet (17) and via at least one filter element with the suction unit (20) is fluidly connected, wherein the filter element (30) on a filter holder (50) is removably received and by means of a sliding movement and / or pivotal movement of the filter holder (50) removable or in the filter holder (50) can be introduced, wherein between the filter holder (50) and the filter element, a sealing arrangement (90) with at least one resilient sealing element (91 , 92) is provided for sealing engagement with a sealing contour (44). It is provided that the at least one resilient sealing element (91, 92) in the manner of a sealing membrane or sealing lip (95) is configured and between the negative pressure region (U) of the suction device (10) and one with respect to the negative pressure region (U) during operation of the Suction unit a higher ambient pressure, in particular atmospheric pressure, having ambient pressure range (UG) is arranged so that the at least one sealing element (91, 92) can be acted upon by the suction unit generated negative pressure from a release position in a sealing position in which the at least one sealing element (91, 92) close to the sealing contour (44), wherein the at least one sealing element (91, 92) in the release position of the sealing contour (44) is spaced or with less force than in the sealing position on the sealing contour (44).

Description

  • The invention relates to a suction device with a suction unit for generating a suction flow and with a suction cup, in which within a negative pressure region in which a negative pressure can be generated by the suction unit, a dirt collecting space for receiving dirt particles contained in the suction flow is arranged, which has a suction inlet and via at least one filter element with the suction unit is fluidly connected, wherein the filter element is removably received on a filter holder and by means of a sliding movement and / or pivotal movement of the filter receptacle removable or introduced into the filter holder, wherein between the filter holder and the filter element, a sealing arrangement with at least a resilient sealing element is provided for sealing engagement with a sealing contour.
  • The filter element is at least partially fluid-tight in the filter holder due to the resilient sealing element. Thus, for example, a loaded with dirt particles suction stream does not flow past the filter element, but must flow through the filter element. However, the assembly of such a filter element is to be made so that the seal or seal assembly is applied tightly against the filter element. This is for example in DE 10 2013 012 241 A1 a filter element described, which is clamped by means of a clamping device with the receiving filter holder. This is awkward.
  • It is therefore the object of the present invention to provide an improved sealing concept for sealing a filter element with respect to a filter holder of a suction device.
  • To solve the problem is provided in a suction device of the type mentioned that the at least one resilient sealing element is designed in the manner of a sealing membrane or sealing lip and between the negative pressure region of the suction device and a relative to the negative pressure region during operation of the suction unit a higher ambient pressure, in particular atmospheric Pressure, exhibiting ambient pressure range is arranged so that the at least one sealing element is acted upon by the suction unit negative pressure from a release position in a sealing position in which the at least one sealing element is tightly against the sealing contour, wherein the spaced at least one sealing element in the release position of the sealing contour or is applied with less force than in the sealing position on the sealing contour.
  • It is a basic idea here that the pressure difference between the negative pressure region of the suction device and in particular the ambient pressure or atmospheric pressure, ensures that act on at least one sealing element in the direction of the sealing contour with force, so that it is moved to the sealing contour zoom or with greater force rests against the sealing contour and ultimately basically only the tightness of the seal assembly is made or the tightness is increased.
  • The filter element is preferably designed as a filter cartridge or as a filter cartridge.
  • The at least one sealing element of the sealing arrangement expediently consists of an elastic, flexible plastic material, rubber or the like. The sealing contour may also consist of an elastic and / or resilient material. Furthermore, the sealing contour can also consist of a rubber material. But the sealing contour can also consist of a relation to the elastic or resilient sealing element harder material, such as a hard plastic, a thermoset or metal. In the case of a sealing contour and sealing element, composite materials are also readily possible; H. For example, a mixture of rubber and elastic plastic or a sandwich component consisting of rubber and elastic plastic.
  • The suction device is preferably a mobile suction device, in particular a workshop vacuum cleaner. The suction device can also be designed in the manner of a transport case or tool case, similar to DE 10 2013 012 241 A1 described. Conveniently, rollers are provided on the sucker housing with which the suction device can be rolled on a substrate. Advantageously, but also supports or shelves can be present on the underside of the suction device.
  • It is expediently provided that at least one inflow opening for fresh air not loaded with dirt particles and / or not sucked into the sucker housing via the suction inlet is provided on the at least one sealing element or between the at least one sealing element and the sealing contour. The inflow opening is preferably provided and arranged so that in case of imperfect sealing of the seal assembly, for example, when the filter element is not correctly located or received in the filter holder, can not flow with dust-laden air through the inflow opening, but clean, so to speak Air or fresh air.
  • The term fresh air should not be understood in this context as well as before in connection with the following description, however, that this fresh air is clean room air, so to speak, but that the fresh air is such air that is not sucked through the suction inlet or the dirt collecting space, but off the environment of the suction device. Of course, dirt particles may be contained in such fresh air to some extent. However, the fresh air is not the suction flow or dust air flow that is present for cleaning via the dirt collecting space and the filter element itself. If such fresh air, so not or with little dirt particles loaded air is sucked in, this flows to the suction unit, so that the suction unit is not or only slightly affected. The fresh air sucked in via the inlet opening thus serves to protect the suction unit, preferably the arrangement is such that air flowing to the suction unit only via the filter element or optionally fresh air sucked in via the at least one inflow opening flows to the suction unit when the suction unit is in operation.
  • The suction flow, which is generated by the suction unit and flows through the suction inlet, however, is loaded with dust and could also be referred to as dust flow. In contrast to the fresh air flow or the fresh air, the dust air stream or the waste air are contaminated with dust or may be contaminated with dust. In any case, the dusty air stream or the dusty air flow into the nipple housing via the suction inlet.
  • It is expediently provided that the inflow opening in the sealing position is closed by the at least one sealing element, if, as it were, everything is in order, for example if the filter element is received in the filter receptacle in a correct position. Furthermore, in the sealing position, the inflow opening is closed when the at least one sealing element and the sealing contour lie undamaged and in a correct position against one another. In the normal suction operation, so to speak, when the components filter holder, seal assembly and filter element are properly arranged and undamaged, the at least one inflow is closed, but otherwise it may be open. Then, however, the already mentioned fresh air flows in via the inflow opening, so that, if appropriate, fresh air flows to the suction unit and air not laden with dust.
  • It is advantageously provided that the at least one inflow opening can be closed on the at least one sealing element by compressing the sealing element or moving the sealing element into the sealing position. For example, an inflow opening may be provided at a free end region of the at least one sealing element. When the sealing element bears against the sealing contour with its free end region, the inflow opening is closed.
  • It is also possible that a flow-through opening is provided on the at least one sealing element, which is provided as an inflow opening. When the sealing element is compressed, the throughflow opening is narrowed or closed, so to speak.
  • Furthermore, the sealing contour and the inflow opening arranged on the sealing element can be positioned relative to one another such that the sealing contour closes off the inflow opening in the sealing position. For example, the inflow opening is arranged frontally in front of the sealing contour.
  • Expediently, the filter receptacle has at least one throughflow opening for fresh air, through which fresh air not loaded with dirt particles and / or fresh air sucked into the suction housing via the suction inlet can flow into the region of the filter element. The flow-through opening is advantageously fluidly connected to the aforementioned at least one inflow opening, which is arranged between sealing element and sealing contour or on the sealing element. Thus, the fresh air, for example, first flow through the flow-through opening in the direction of the inflow opening, which, however, is normally closed by the at least one sealing element. If, however, there is a fault situation there, fresh air optionally flows through the throughflow opening and the inflow opening in the direction of the suction unit. The at least one flow-through opening is arranged, for example, on a receiving body defining the filter holder, in particular a frame. A preferred concept provides that the at least one flow-through opening is arranged between the frame-defining frame parts. The at least one flow-through opening can also be present on a sliding guide, in particular a guide groove or guide receptacle, with which the filter element is guided on the filter holder. Such a sliding guide will be explained below:
  • A preferred concept provides that the filter receptacle has a sliding guide, in which the at least one filter element in the manner of a drawer is insertable. The sealing arrangement is expediently arranged on or next to the sliding guide. If the suction unit is not in operation, the seal assembly is so to speak, loose or yielding, is in any case in the release position. This hinders the Sealing arrangement, the movement of the filter element relative to the filter recording not or only slightly. However, if the suction unit is running, the at least one sealing element in the direction of the sealing contour is acted upon by pressurization stronger force or moved towards the sealing contour, so that the sealing effect begins. In this operating condition even a particularly favorable and firm hold of the filter element is effected on the filter holder. The seal arrangement can provide, for example, for a jamming or distortion of the filter element on the filter holder when the suction unit is running and / or in operation.
  • The sealing arrangement can be arranged, for example, next to the actual sliding guide, in particular its guide elements. It may for example be arranged on a frame in which the filter element can be inserted. For example, the seal assembly may be provided for engagement with a top or bottom of the guide member. However, it is also possible for the sealing arrangement to be arranged directly on the sliding guide, for example its guide contours.
  • One advantage of the concept is that the filter element is supported and / or guided on the sliding guide apart from the sealing arrangement or independently of the sealing arrangement. For this purpose, for example, a guide element is provided, on which rests the filter element or on which rests the guide element. The guide element may be, for example, a support leg, guide leg or the like. The independent of the seal assembly support and / or leadership of the sliding guide for the filter element expediently consists of a relation to the seal assembly harder and / or unyielding material, for example made of metal, a harder plastic or the like. The sealing arrangement, in particular the at least one sealing element, on the other hand, is yielding and / or elastic. It consists for example of rubber or the like.
  • Advantageously, it is provided that the sealing arrangement is arranged on a longitudinal guide with a guide projection and a guide receptacle, on which the filter element is guided along a longitudinal axis.
  • It is expediently provided that the guide projection and / or the at least one sealing element have an elongated, extending along the longitudinal axis shape. Alternatively, it would also be conceivable that the sealing element or the guide projection have one or more interruptions or are segmented. For example, it is possible for the sealing segments of the at least one sealing element or guide segments to mutually intermesh with one another in the sealing position in order to produce a tight seal between the filter element and the filter holder.
  • It is preferably provided that two sealing elements are provided on the guide receptacle, which lie opposite each other with their free end regions and whose free end regions rest in the sealing position on the guide projection.
  • Between the free end portions is expediently a distance. The distance can be closed, for example, by the sealing contour or the guide projection when the sealing position is taken.
  • It is possible that the free end regions abut, as it were, laterally on the guide projection as side flanks.
  • A preferred concept provides that the guide projection on the guide receptacle is supported on at least one guide element away from the seal arrangement and / or away from the at least one sealing element, in particular away from all sealing elements, transversely to the longitudinal axis. The guide element is thus independent and / or separate from the seal arrangement. The guide element expediently consists of a material which is harder and / or less flexible compared with the sealing arrangement, in particular with respect to the at least one sealing element. The guide element can be provided with a sliding coating. The guide element has a guide function or support function, but not primarily a sealing function.
  • It is advantageous if at least one inflow opening, for example the inflow opening already mentioned, is provided on the guide receptacle for fresh air not loaded with dirt particles and / or not sucked into the sucker housing via the suction inlet. For example, the inflow opening may be provided on a groove bottom of a guide groove.
  • Appropriately, it is provided that the filter element subdivides the negative pressure region with respect to a flow direction of the suction flow to the suction unit into an inflow negative pressure region and an outflow negative pressure region between which a pressure difference is present when the suction aggregate is switched on. The sealing arrangement separates the inflow and outflow negative pressure regions from each other and / or is arranged between the negative pressure regions. Between the inflow and negative pressure area and the outflow negative pressure region, the filter element is arranged.
  • Furthermore, it is advantageous if at least one through-flow opening or inlet opening for fresh air is arranged between the inflow-negative pressure area and an outflow-negative pressure area, through which fresh air can flow away from the suction flow in the direction of a flow channel to the suction unit.
  • The flow-through or inflow opening is expediently closed by the at least one sealing element in the sealing position during operation of the suction unit. So if the sealing element is not working properly, d. H. the sealing position is not reached, at most fresh air flows in the direction of the suction unit.
  • It is preferably provided that the at least one sealing element and the associated sealing contour is arranged in a flow channel between the inflow low pressure region and the outflow negative pressure region and closes it in the sealing position. The inflow opening or throughflow opening is arranged on the flow channel. The flow channel runs past the filter element. In the flow channel is preferably arranged above the sliding guide.
  • At this point, it should be mentioned that the sliding guide in the manner of a labyrinth seal can be arranged in the flow channel between the inlet negative pressure region and the outlet negative pressure region in order to at least hinder an air flow from the inlet negative pressure region to the downstream negative pressure region.
  • In principle, it is possible that the nipple housing is opened, for example, to arrange the filter element in the filter holder. For example, a housing upper part is to be removed from a housing lower part, so that the filter receptacle is accessible.
  • An expedient and shown in the drawing concept, however, provides that on a wall of the sucker housing, an opening is provided, through which the filter element in an interior of the sucker housing can be introduced. For example, the wall is a side wall or rear wall. However, it would also be readily possible for the wall to be a top wall or top wall, on which an opening for introducing the filter element is provided.
  • It is possible that the filter element can be arranged in an interior of the sucker housing, if previously a flap or other closure opening has been opened.
  • Advantageously, however, it is provided that a cover of the filter element closes the opening when the filter element is arranged in the sucker housing. A handle opening, a handle or a grip recess or another operating handle is advantageously present on the cover in order to arrange the filter element in the suction housing and / or to remove it from the suction housing.
  • It is expediently provided that at least one cover-seal arrangement is arranged between the cover and the suction-body housing. For example, an outer circumference of the opening on the sucker housing and / or the cover is provided with a correspondingly sealing coating, in particular a resilient coating. It is expedient, for example, that the lid-sealing arrangement has a sealing lip. It is preferred when the lid during operation of the suction device is acted upon by a pressure difference between the environment of the suction device and the interior of the suction device with force. Thus, as it were, the suction unit sucks the cover in the direction of a sealing position closing the opening on the sucker housing.
  • Appropriately, it is provided that the filter holder is arranged in a flow channel between the dirt collecting space and the suction unit. Apart from an optional flow opening or inflow opening for fresh air, in particular between the already mentioned inflow vacuum area and the outflow vacuum area, this flow channel is closed and / or flow-tight and / or airtight.
  • Appropriately, it is provided that the seal arrangement extends at least two or more mutually angular peripheral sides of the filter element. It is preferable if the sealing arrangement extends on longitudinal sides of the filter element and on a transverse end face of the filter element. For example, the sealing arrangement extends along the longitudinal guides or sliding guide and transversely to a bottom or an end face of the filter holder. It is preferred if the entire outer circumference of the filter element surrounded by the seal assembly. Furthermore, it is possible that the sealing arrangement extends around the outer circumference of the filter element as a whole, except, for example, a cover of the filter element.
  • Hereinafter, an embodiment of the invention will be explained with reference to the drawing. Show it:
    • 1 an oblique perspective view of a suction device obliquely from above with a filter element which is pulled out in the manner of a drawer from the nipple housing of the suction device,
    • 2 a rear detail of the suction device according to 1 with inserted into the sucker housing filter element,
    • 3 a perspective oblique view of a filter receptacle with the filter element according to 1 in the extended state of the filter holder,
    • 4 a detail D1 off 3 .
    • 5 a perspective oblique view from the front of the filter holder according to 3 .
    • 6 a side view of the filter holder and the filter element according to 3 - 5 with filter element inserted into the filter holder,
    • 7 a cross-sectional view through the filter holder and the filter element, approximately along a section line XX in 6 .
    • 8th an enlarged view of a left portion of the view according to 7 .
    • 9 a detail of an embodiment with a membrane as a sealing element in the sealing position and
    • 10 the detail according to 9 , but with the sealing element in the release position.
  • A suction device 10 has a nipple housing 11 which is on rollers 12 . 13 can be moved on a ground. At a front 14 or a front wall of the sucker housing 11 is a suction inlet 17 arranged, to which a suction hose 18 is connectable. About the suction hose 18 or the suction inlet 17 is a suction flow S in an interior of the sucker housing 11 sucked, with dirt particles located in the suction flow S in a dirt collecting space 19 of the sucker housing 11 can collect. In the dirt collection room 19 is preferably a filter bag or filter bag can be arranged. This is not necessary. The dust or dirt can also be released in the dirt collecting room 19 accumulate, whereupon it is emptied from time to time.
  • Between the dirt collection room 19 and a suction unit 20 , which generates the suction flow S, is a filter element 30 arranged, which contained in the suction flow S dirt particles in the dirt collecting space 19 holds back, leaving this from the filter element 30 away as particle-poor or particle-free suction flow A further in the direction of the suction unit 20 flows. From there, the particle-poor suction flow A flows through at least one outflow opening 21 from the nipple housing 11 out.
  • The filter element 30 is in a flow channel 28 between the dirt collecting room 19 and the suction unit 20 arranged. The suction unit 20 is via a flow channel 29 with the at least one outflow opening 21 flow-connected.
  • The suction unit 20 is for example via a power supply device 24, in particular via a battery, an accumulator or other power supplier on board the suction device 10 powered. Alternatively or in addition, however, is also a connection line 23 for connection to a power grid with, for example, 110 or 230 volts AC or the like provided. But that does not matter in detail. It is essential that for the operation of the suction unit 20 in particular electrical energy is provided.
  • On a control surface 16 , for example in the area of the front 14 or between the front 14 and a top of the sucker housing 11 , are controls for operating the suction device 10 provided, for example, a switch 25 with which the suction unit 20 can be switched on and off.
  • The ergonomic concept of the suction device 10 However, not only is limited to a simple connection of suction hose and convenient accessibility of controls, but is also considerably by a replaceability of the filter element 30 favored.
  • The filter element 30 can without opening the sucker housing 11 in which, for example, its upper part 26 from the lower part 27 is removed, be replaced. The top 26 is from the bottom part 27 preferably only for emptying the dirt collecting space 19 away.
  • At one beside the front 14 extending side wall 15 of the sucker housing 11 is an opening 22 provided, through which the filter element 30 in an interior and thus in the flow channel 28 between the dirt collecting room 19 and the suction unit 20 can be brought. The dust from the suction flow S must be the filter element 30 flow through, it is cleaned. The filter element 30 Retains particles contained in the suction flow S, back.
  • The filter element 30 includes a filter cartridge 31 , For example, a filter fabric, a cardboard structure, a fabric or the like other suitable material, on the one hand is permeable to air and a flow connection between dirt collecting space 19 and suction unit 20 allows, on the other hand, but can retain in the suction flow S contained dirt particles. The filter insert 31 is on a support frame 32 held. For example, the filter cartridge 31 or the filter fabric clamped in the support frame, inserted or otherwise attached thereto.
  • A lid 33 , so to speak, a drawer front has an outer peripheral contour, the inner peripheral contour of the opening 22 of the sucker housing 11 fits, leaving the filter element 30 visually appealing and the sucker housing 11 so to speak laterally closing (see 2 ) in the nipple housing 11 can be introduced. Then a front side of the lid is aligned 33 with the sidewall 15 apart from a recessed grip 34 with which an operator removes the filter element 30 can comfortably take.
  • The filter insert 31 for example, between the lid 33 and a rear wall opposite this 36 of the supporting frame 32 as well as across it between side walls 35 of the supporting frame 32 held. Upper side and lower side or downstream and upstream of the filter element 30 are preferably holding structures 37 , For example, transverse webs, longitudinal webs, truss structures, grid structures or the like provided to the filter cartridge 31 , in particular a nonwoven material or cardboard material, support. At this point it should be mentioned that the filter cartridge 31 can easily include a pleated filter.
  • The filter element 30 is in a filter holder 50 , which in the suction device 10 and in particular in the flow channel 28 is arranged, held. The filter holder 50 comprises a receiving space 51 in which the filter element 30 in its position of use, ie for the suction of the suction device 10 , recorded. The recording room 51 is in a frame 52 intended. The frame 52 is for example with the sucker housing 11 screwed or connected in any other way. The frame is preferred 51 a separately on the sucker housing 11 mountable component, but could also be integral part of the sucker housing 11 form, for example, to a basic structure of the side wall 15 be sprayed.
  • The frame 52 includes frame parts 53 . 54 , which are screwed together and / or attached to each other, for example. For example, standing in front of side walls 55 the frame parts 53 or of the frame 52 Connecting protrusions 57 before, for example, for bonding, screwing or the like otherwise connecting the frame parts 53 . 54 are suitable.
  • The frame 52 or the filter holder 50 points next to the already mentioned sidewalls 55 a back wall 56 on, the one front wall 58 opposite. On the front wall 58 are retaining projections or hooks 59 , Preferably, therefore, locking means or hook means provided for the connection to the nipple housing 11 are suitable. For example, the frame 52 in the nipple housing 11 engaged or with the sucker housing 11 be hooked.
  • At the connection projections 57 are for example screw domes 60 provided, which rest on each other. Through the screw domes 60 Screws can be screwed through. The screw domes 60 But could also be domes, not for screwing, but for example for bonding, locking or other connection of the frame parts 53 . 54 are suitable.
  • Between the frame parts 53 . 54 is preferably a distance 61 present, through the fresh air F in the range of filter intake 50 , especially in the recording room 51 and thus to the filter element 30 can flow. Thus, the connection projections hold 57 the frame parts 53 . 54 so to speak, at a distance, so that the flow-through 61 remains free. The flow opening 61 extends, so to speak, as a slot between the frame parts 53 . 54 along the side walls 55 as well as the back wall 56 , Thus, so to speak targeted false air or fresh air F, at least not laden with dust air, in the range of the filter cartridge and the filter element 30 flow, if a leak in the area of the filter element 30 occurs. The suction unit 20 Thus, if necessary, fresh air F sucks rather than air, for example, particles from the dirt collecting space 19 contains. This becomes even clearer.
  • The filter holder 50 has a guide 62 on, in the guide tabs 40 of the filter element 30 can intervene. The guide shot 62 and the guide projections 40 realize a total of a sliding guide 63 with which the filter element 30 along a longitudinal axis L in the filter holder 50 insertable or insertable and can be pulled out of the same again.
  • When the filter element 30 in the filter holder 50 is inserted, there is a contact surface 39 a lid body 38 of the lid 33 on sealing lips 81 a lid-seal arrangement 80 at. The sealing lips 81 extend around a receiving opening 64 around, through which the filter element 30 in the filter holder 50 is insertable. The sealing lips 81 have along longitudinal legs or longitudinal sections of the receiving opening 64 extending sealing lip sections 82 as well as along the narrow sides of the receiving opening 64 extending, to the sealing lip sections 82 angular sealing lip sections 83 on. The sealing lip sections 82 . 83 go with bow sections 89 into each other. Between the opposite end areas 84 the sealing lip sections 83 is a distance 85 available. Furthermore, the end areas 84 Beveled and have inclined surfaces 86 on whose contour to the cross-sectional contour of the guide projections 40 fits. Thus, so are the inclined surfaces 86 at the guide projections 40 , By the distance 85 is a mobility of the end areas 84 given relative to each other, allowing for optimal sealing.
  • In addition, the sealing lips 81 through the lid 83 in the direction of the front wall 58, at least the filter holder 50 movable. The sealing lips 81 have a mounting portion 87 on, for example, on the inside of the receiving opening 64 on the front wall 58 , at least the filter holder 50 , is attached, for example, engaged, inserted, glued or the like. From the attachment section 84 stands the designed as a lip seal section 88 a respective sealing lip 81 at an angle and overlaps the front of the front wall 85 , This movable and elastic sealing section 88 , so to speak the actual sealing lip 81 , can from the lid 33 towards the front wall 58 displaced, causing the sealing lip 81 between the front wall 58 and the lid body 38 or the lid 33 to come to rest. As a result, an excellent flow-tightness is created. In particular, the suction flow S or the negative pressure that passes through the suction unit 20 during operation of the suction device 10 is generated, to the filter drawer or the filter element 30 in the direction of the interior of the suction device, so to speak 10 at least in the direction of the flow channel 28 to draw or force, whereby the tightness of the lid-seal assembly 80 is still increased. Should still be false air between the lid 33 and the front wall 38 the filter holder 50 flow, this is so to speak clean air, which in any case not to a pollution of the suction unit 20 leads.
  • The sliding guide 63 includes guide elements 65 between which a distance 66 is available. The guide elements 65 include or are for example support legs, support contours or the like. In the distance 66 picks up a base leg 41 a respective leadership advantage 40 one, from the side thighs 42 angular, in particular rectangular, stand out. The side legs 42 are expediently on the guide elements 65 at. The guide elements 65 exist as well as the basic material of the filter holder 50 , in particular the frame 52 , made of a hard and therefore lubricious material. Also the support frame 32 and in particular the guide projections 40 are expediently made of a lubricious and / or hard material. Thus, the guide projections slide 40 with low friction on the sliding guide 63 or the guide elements 65 along what the operation or replacement of the filter element 30 facilitated.
  • The tight leadership of the base leg 41 between the guide elements 65 preferably forms a kind of labyrinth seal 69 , The labyrinth seal 69 does not have to be pressure tight. But it can be an air flow from an ambient pressure range UG in the region of the receiving space 51 hinder. In the ambient pressure range UG, so the environment of the suction device 10 For example, atmospheric pressure prevails.
  • It is possible that, for example, in addition to the base leg 41 Supporting contours 165 (in 7 schematically drawn) are arranged, in particular the form-fitting in a space between the side legs 42 and the frame 35 intervention. This is a better labyrinth seal 69 realizable.
  • The support contours 165 stand, for example, in front of the guide elements 65 between the side legs 42 and the frame 35 in front. In addition and / or as an alternative to the function as a labyrinth seal, a further guidance of the filter element is also provided by the additional support contours 165 30 given in several, in particular all directions with respect to the longitudinal axis L a support. The filter element 30 is in the area of the sliding guide 63 possibly adjustable in the direction of the longitudinal axis L, but not transversely thereto.
  • In front of the frame parts 53 . 54 stand protrusions 67 . 68 in the direction of the other frame part 54 . 53 in front. The projections 67 . 68 are for example next to the sliding guide 63 and in the exterior of the frame 52 at least outside the recording room 51 arranged. The projections 67 . 68 However, allow inflow of fresh air F in the direction of the flow opening 61 and close the flow opening 61 Not.
  • The filter element 30 is in the flow channel 28 arranged. The flow channel 28 is in total in a negative pressure range U or defines a negative pressure range U, if the suction unit 20 is in operation. The suction unit 20 generates the negative pressure region U or ensures negative pressure in the negative pressure region U. The filter element 30 divides the negative pressure area U into an inflow negative pressure area ZU, which is between the filter element 30 and the dirt collection room 19 extends, and a downstream negative pressure area UA between the filter element 30 and the suction unit 20 , The filter element 30 represents a flow resistance for the suction flow S, which is why the negative pressure in the outflow negative pressure region UA is usually greater than in the inflow negative pressure region ZU. Thus, the suction flow S has a tendency on the filter element 30 over, for example, in the space between the inside or the inner peripheral contour of the filter holder 50 and the outer peripheral contour or the outer periphery of the filter element 30 passing the filter element in the direction of the suction unit 20 to flow, which can lead to pollution there. In contrast, effective remedy is created.
  • The filter holder 50 or the recording room 51 is through a seal arrangement 90 sealed. Furthermore, the seal arrangement ensures 90 for an at least substantially pressure-tight separation of the inflow negative pressure region ZU from the outflow negative pressure region UA, so that the suction flow S the filter element 30 flows through it, whereby it is cleaned of particles and as a particle-poor suction flow A in the direction of the suction unit 20 flows.
  • The seal arrangement 90 includes sealing elements 91 . 92 leading to a sealing projection 43 of the filter element 30 protrude. The sealing projection 43 is an extension of the base leg, so to speak 41 and thus on the leadership lead 40 arranged. The sealing projection 43 has lateral contact surfaces or side flanks, which the sealing contours 44 define.
  • The sealing elements 91 . 92 are on the frame parts 53 . 54 established. The sealing elements 91 . 92 have fastening sections 93 as well as sealing sections 94 on. The sealing sections 94 each define a sealing lip 95 , the tangential and at least in a sealing position sealing the sealing contour 44 or the sealing projection 42 is applied.
  • A preferred concept of the invention, not limited to the specific embodiment according to the drawing, provides that the at least one sealing element projecting transversely to a potential flow direction freely in the direction of the sealing contour, so that it rests in the sealing position on the sealing contour in any case with greater force as in the release position. This is also the case in the embodiment.
  • The sealing elements 91 . 92 the seal arrangement 90 are as sealing lips 95 designed. The sealing lips 95 or sealing elements 91 . 92 are with mounting sections 93 in sealing element recordings 45 of the frame 52 held. The sealing element recordings 45 are laterally next to the guide elements 65 arranged. The sealing elements 91 . 92 stand with sealing sections 94 facing each other in the direction of the sealing projection 43 in front. The sealing portions 94 form a total of sealing lips 95 out. The sealing elements 91 . 92 extend along the longitudinal axis L or parallel to the longitudinal axis L at a respective bottom portion of the guide receptacle 62 and form this.
  • However, between the free end areas or sealing sections 94 the sealing elements 91 . 92 a gap available. Anyway, it is possible that the sealing sections 95 can move relative to each other or away from each other. Thus, both seal sections 94 optimal to the sealing projection 43 create laterally, what the upper sealing projection or sealing section 94 of the sealing element 91 in 8th is indicated.
  • By a pressure difference between the ambient pressure range UG, where, for example, atmospheric pressure prevails, as well as the negative pressure range U with a through the suction unit 20 generated or generated negative pressure, which is also present in each of the two vacuum areas UZ and UA, are the sealing elements 91 . 92 at least the sealing section 94 , with a force in the direction of the sealing projection 43 acted upon, so that a higher density, in any case a sealing position is reached.
  • In the embodiment, the concept is chosen so that the sealing portions 94 even without pressurization at least with little force on the sealing projection 43 issue. However, this force is significantly smaller than that which occurs during operation of the suction unit 20 occurs. Due to the low application of force to the sealing elements 91 . 92 if the suction unit 20 not running, can be designed as a drawer filter element 30 lightly in the sliding guide 63 plugged in and pulled out of this. Nevertheless, during suction operation of the suction device 10 achieved a high density.
  • Should a leak nevertheless occur, fresh air F can flow through the flow opening 61 in the direction of an inflow opening 98 flow, for example, by the distance between the free end portions of the sealing elements 91 . 92 is possible to each other. The inflow opening 98 communicates with the flow opening 61 , The pressure difference between the ambient pressure region UG and the negative pressure region U, and thus also at least the outflow negative pressure region UA, so to speak creates a suction of fresh air F into the flow channel 28 at the sealing arrangement 80 past. The fresh air F is not or only slightly charged with dust particles. It can, for example, via inlet openings 121 of the sucker housing 11 flow into the interior of the nipple housing and so on the flow-through 61 as well as the inflow opening 98 in the flow channel 28 flow. In any case, the pressure difference between the inflow vacuum region UZ and the outflow negative pressure region UA is smaller than the pressure difference between the ambient pressure region UG and the outflow negative pressure region UA, which is why primarily the suction flow S, so loaded with dirt particles suction flow, the fresh air flow F in the direction the suction unit 20 flows. This is indicated for example by a in the flow channel 28 inflowing external air F indicating arrow IF.
  • The seal arrangement 90 extends with longitudinal sections 96 along the sliding guide 63 or the guide shots 62 , At one end, opposite to the lid 33 or the lid 33 opposite, the filter holder 50 are transverse sections 97 the seal arrangement 80 intended. Also the filter drawer or the filter element 30 has at its front side, ie at the lid 33 opposite side, a projection in the manner of the guide projection 40 on. The leadership advantage 40 thus extends over the entire outer circumference of the filter element 30 or of the supporting frame 32 so that he also between the cross sections 97 the sealing elements 91 . 92 can intervene. Thus, also an end-side sealing of the filter element 30 regarding the filter intake 50 given according to the concept of the invention.
  • According to the embodiment 9 and 10 are used essentially the same components as already explained. In that regard, the same reference numerals exist. However, instead of the seal arrangement 90 a seal arrangement 190 provided, the sealing element 191 as a sealing membrane 195 is designed. The sealing membrane 195 is kraftbeaufschlagbar by the pressure difference between the ambient pressure range UG and the negative pressure range U, so that they are in a sealing position (shown in 9 ), for example, to the sealing projection 43 applies and thus produces a pressure-tightness between the vacuum areas UZ and UA. Furthermore, ambient air or fresh air F can not flow into the negative pressure area U. The sealing projection 43 is located at an inlet opening 198 the sealing membrane 195 and close it.
  • It is also possible that the inflow opening 198 the sealing membrane 195 in an end position, in dashed lines in 9 is indicated, narrowed so that it is flow-tight or at least obstructs an air flow. For example, the material of the sealing membrane 195 correspondingly elastic or yielding to the inflow opening 198 to narrow.
  • However, if the sealing membrane 195 not or not close to the sealing projection 43 is applied, is the inflow opening 198 released, so that optionally fresh air F through the inlet opening 198 into the negative pressure range U ( 10 ).
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited patent literature
    • DE 102013012241 A1 [0002, 0008]

Claims (20)

  1. Suction device with a suction unit (20) for generating a suction flow (S) and with a nipple housing (11), in which within a negative pressure region (U), in which by the suction unit (20) a negative pressure can be generated, a dirt collecting space (19) Receiving arranged in the suction flow (S) dirt particles is arranged, which has a suction inlet (17) and via at least one filter element (30) with the suction unit (20) is fluidly connected, wherein the filter element (30) on a filter holder (50) detachably is received and by means of a sliding movement and / or pivotal movement of the filter holder (50) removably or in the filter holder (50) can be introduced, wherein between the filter holder (50) and the filter element (30) has a seal assembly (90) with at least one resilient sealing element (91, 92) is provided for sealing engagement with a sealing contour (44), characterized in that the at least one resilient sealing element (91, 92) in de R type of sealing membrane (195) or sealing lip (95) is configured and between the negative pressure region (U) of the suction device (10) and one with respect to the negative pressure region (U) during operation of the suction unit (20) a higher ambient pressure, in particular atmospheric pressure having Ambient pressure range (UG) is arranged so that the at least one sealing element (91, 92) by the suction unit (20) generated negative pressure from a release position can be acted upon in a sealing position in which the at least one sealing element (91, 92) close to the sealing contour ( 44), wherein the at least one sealing element (91, 92) in the release position of the sealing contour (44) is spaced or with less force than in the sealing position on the sealing contour (44).
  2. Suction device after Claim 1 , characterized in that at least one inflow opening (98) for fresh air (F) not loaded with dirt particles and / or not sucked into the sucker housing (11) via the suction inlet (17) on the at least one sealing element (91, 92) or between the at least one sealing element (91, 92) and the sealing contour (44) is provided.
  3. Suction device after Claim 2 , characterized in that the at least one inflow opening (98) in the sealing position by the at least one sealing element (91, 92) is closed when the filter element (30) is received in the filter holder (50) in a correct position and / or if the at least one sealing element (91, 92) and the sealing contour (44) rest undamaged and in a correct position against one another.
  4. Suction device after Claim 2 or 3 , characterized in that the at least one inflow opening (98) on the at least one sealing element (91, 92) by compression of the at least one sealing element (91, 92) or movement of the at least one sealing element (91, 92) can be closed in the sealing position ,
  5. Suction device according to one of the Claims 2 to 4 , characterized in that the inflow opening (98) is provided at a free end region of the at least one sealing element (91, 92) and / or comprises a flow-through opening (61) on the at least one sealing element (91, 92).
  6. Suction device according to one of the preceding claims, characterized in that the filter holder (50) has at least one throughflow opening (61) for fresh air (F), through which no dirt particles are loaded and / or not via the suction inlet (17) into the suction housing ( 11) sucked fresh air (F) in the region of the filter element (30) can flow.
  7. Suction device according to one of the preceding claims, characterized in that the filter holder (50) has a sliding guide (63) into which the filter element (30) can be inserted in the manner of a drawer, and the sealing arrangement (90) on or next to the sliding guide ( 63) is arranged and / or that the filter element (30) on the sliding guide (63) is supported and / or guided away from the seal assembly (90).
  8. Suction device according to one of the preceding claims, characterized in that the sealing arrangement (90) on a longitudinal guide with a guide projection (40) and a guide receptacle (62) is arranged, on which the filter element (30) is guided along a longitudinal axis.
  9. Suction device after Claim 8 , characterized in that the guide projection (40) and / or the at least one sealing element (91, 92) have an elongated shape extending along the longitudinal axis.
  10. Suction device after Claim 8 or 9 , characterized in that the sealing contour (44) of the guide projection (40) of the longitudinal guide is formed and the at least one sealing element (91, 92) on the guide receptacle (62), in particular on a bottom portion, the longitudinal guide is arranged.
  11. Suction device according to one of the Claims 8 to 10 , characterized in that on the guide receptacle (62) has two sealing elements (91, 92) are provided, which lie opposite with their free end portions and whose free end portions in the Sealing position on the guide projection (40) abut.
  12. Suction device according to one of the Claims 8 to 11 , characterized in that the at least one sealing element (91, 92) or two sealing elements (91, 92) rest in the sealing position on an end face of the guide projection (40).
  13. Suction device according to one of the Claims 8 to 12 , characterized in that the guide projection (40) on the guide receptacle (62) away from the seal assembly (90) and / or away from the at least one sealing element (91, 92), in particular away from all sealing elements (91, 92), transverse to the longitudinal axis is supported on at least one guide element (65).
  14. Suction device according to one of the Claims 8 to 13 , characterized in that at least one inflow opening (98) for not loaded with dirt particles and / or not on the suction inlet (17) in the suction cup (11) sucked fresh air (F) on the guide receptacle (62) is provided.
  15. Suction device according to one of the preceding claims, characterized in that the filter element (30) the negative pressure region (U) with respect to a flow direction of the suction flow (S) to the suction unit (20) in an inflow negative pressure region (UZ) and a downstream negative pressure region ( UA), between which when the suction unit (20), a pressure difference is present.
  16. Suction device after Claim 15 , characterized in that the sealing arrangement (90) between the inflow low-pressure region (UZ) and a downstream negative pressure region (UA) at least one through-flow opening (61) or inflow opening (98) for fresh air (F) is arranged, through which fresh air ( F) away from the suction flow (S) in the direction of a flow channel (28) to the suction unit (20), wherein expediently the at least one sealing element (91, 92) in the sealing position, the flow-through opening (61) or inflow opening (98) during operation of the Suction unit (20) closes.
  17. Suction device according to one of the preceding claims, characterized in that on one wall of the sucker housing (11) an opening (22) is provided through which the filter element (30) can be introduced into an interior of the sucker housing (11).
  18. Suction device after Claim 17 characterized in that a lid (33) of the filter element (30) closes the opening (22) when the filter element (30) is disposed in the nipple housing (11).
  19. Suction device after Claim 18 , characterized in that between the cover (33) and the nipple housing (11) at least one cover-seal assembly (80) is arranged, wherein the cover-seal assembly (80) expediently at least one sealing lip (95) (81) and / or wherein the lid (33) against the lid-sealing arrangement (80) expediently during operation of the suction unit (20) by a pressure difference between the environment of the suction device and the interior of the suction device (10) is acted upon with force.
  20. Suction device according to one of the preceding claims, characterized in that the sealing arrangement extends on at least two mutually angled peripheral sides of the filter element (30), in particular on longitudinal sides of the filter element (30) and at least one transverse end face of the filter element
DE102016124030.3A 2016-12-12 2016-12-12 Suction device with a filter element Pending DE102016124030A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102016124030.3A DE102016124030A1 (en) 2016-12-12 2016-12-12 Suction device with a filter element

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016124030.3A DE102016124030A1 (en) 2016-12-12 2016-12-12 Suction device with a filter element
EP17206085.7A EP3332684A1 (en) 2016-12-12 2017-12-08 Suction device with a filter element

Publications (1)

Publication Number Publication Date
DE102016124030A1 true DE102016124030A1 (en) 2018-06-14

Family

ID=60629555

Family Applications (1)

Application Number Title Priority Date Filing Date
DE102016124030.3A Pending DE102016124030A1 (en) 2016-12-12 2016-12-12 Suction device with a filter element

Country Status (2)

Country Link
EP (1) EP3332684A1 (en)
DE (1) DE102016124030A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002078652A (en) * 2000-09-11 2002-03-19 Sharp Corp Vacuum cleaner and filter unit therefor
US20060123588A1 (en) * 2002-12-30 2006-06-15 Helmut Kaiser Vacuum cleaner comprising a filter drawer
DE102007036338A1 (en) * 2007-08-02 2009-02-05 Vorwerk & Co. Interholding Gmbh Vacuum cleaner with a filter bag arranged therein and filter bag for this purpose
DE102007040963A1 (en) * 2007-08-30 2009-03-05 Miele & Cie. Kg Vacuum cleaner with a motor fan, in whose exhaust air flow a fine filter is arranged
DE102013012241A1 (en) 2013-07-23 2015-01-29 Festool Gmbh Suction device with a dirt collector
DE102013012215A1 (en) * 2013-07-23 2015-01-29 Festool Gmbh Suction device with a main filter

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Publication number Priority date Publication date Assignee Title
US6875255B2 (en) * 2002-05-08 2005-04-05 The Hoover Company Removable dirt separation system for a vacuum cleaner
US7235121B2 (en) * 2003-12-26 2007-06-26 West Timothy J Externally removable vacuum cleaner filter apparatus

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Publication number Priority date Publication date Assignee Title
JP2002078652A (en) * 2000-09-11 2002-03-19 Sharp Corp Vacuum cleaner and filter unit therefor
US20060123588A1 (en) * 2002-12-30 2006-06-15 Helmut Kaiser Vacuum cleaner comprising a filter drawer
DE102007036338A1 (en) * 2007-08-02 2009-02-05 Vorwerk & Co. Interholding Gmbh Vacuum cleaner with a filter bag arranged therein and filter bag for this purpose
DE102007040963A1 (en) * 2007-08-30 2009-03-05 Miele & Cie. Kg Vacuum cleaner with a motor fan, in whose exhaust air flow a fine filter is arranged
DE102013012241A1 (en) 2013-07-23 2015-01-29 Festool Gmbh Suction device with a dirt collector
DE102013012215A1 (en) * 2013-07-23 2015-01-29 Festool Gmbh Suction device with a main filter

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Title
JP 2002- 78 652 A (Maschinenübersetzung), ESPACENET [online] Patent Translate Powered by EPO and Google [abgerufen am 25.09.2017] *

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