DE102018110320A1 - Particle collection device as well as system - Google Patents

Abstract

The invention relates to a particle collecting device (1) for collecting particles from surfaces for particle analysis in a test of technical cleanliness of test specimens, in particular electronic assemblies and machines, comprising a first particle collecting unit (12) for collecting particles from a Saugluftvolumenstrom over an end section (18) having a suction opening (17) and a suction hose (20) comprising a flexible connecting section (19) can be sucked. According to the invention, it is provided that the end portion (18) of the suction hose (20) is electrically conductive and electrically conductively contacted and / or contacted via the likewise electrically conductive flexible connecting portion (19) with ESD contacting means (25) for electrically conductive contacting with a protective conductor, the end section (18) being formed by a suction element (26) which is preferably detachably connected to the flexible connecting section (19) and preferably designed as a suction nozzle, and wherein the suction element (26) comprises electrically conductive and flexible bristles (28). for stripping the test specimen.

Description

The present invention relates to a particle collecting device according to claim 1 for collecting particles from surfaces for particle analysis in a test of the technical cleanliness of specimens, in particular electronic assemblies and machines with a first particle collecting unit for collecting particles from a Saugluftvolumenstrom via a suction port having end portion and a flexible connecting portion comprehensive suction hose is sucked.

Furthermore, the invention relates to a cleaning system according to claim 11 comprising a particle collecting device and in particular particle analysis means for analyzing and evaluating the particles collected by means of the particle collecting device and collected in the particle collecting unit.

Particle collecting devices for collecting particles from surfaces for particle analysis in the context of a test of the technical cleanliness of test specimens are generally known from the generic state of the art in the form of customary and commercial industrial cleaning devices.

In the EN 20 2016 106 164 U1 the applicant has already described an innovative particle collecting device for testing the technical cleanliness of specimens, in particular workpieces and machines, in an industrial production. The particle collecting device comprises two independent or complementary particle collecting units, which are arranged in a suction-air-conducting manner one after the other and in each case allow the particles contained in the suction-air volume flow to be collected. For this purpose, the surface to be tested is traversed or swept with the suction hose, wherein soluble particles are absorbed on the surface to be tested by the Saugluftvolumenstrom, which can then be collected in the particle collecting units and thus evaluated for a subsequent analysis. However, in this process, potential differences can occur between the suction hose and the component to be tested, resulting in voltage breakdowns with short discharge currents. For electronic components, these electrostatic discharges (ESD) are extremely damaging and may result in the partial or total destruction of the electronic component and / or components incorporated therein, such as semiconductor devices. For this reason, electronic components and machines must be protected against electrostatic discharges.

Based on the aforementioned prior art, the present invention seeks to provide a generic particle collecting device for collecting particles from surfaces for particle analysis in the context of a test of the technical cleanliness of specimens, especially electronic assemblies and machines, indicate at the damage or even complete Destruction by, in particular parasitic, electrostatic discharge is completely avoided by the electrical components to be tested. Preferably, the particle collecting device should also be mobile and easy to transport and should be adaptable to different customer requirements.

This object is achieved with respect to the particle collection device having the features of claim 1, i. in a generic particle collecting device for collecting particles from surfaces for particle analysis in the examination of the technical cleanliness of specimens, in particular electronic assemblies and machines, characterized in that the end portion of the suction hose is electrically conductive and electrically conductive via the likewise electrically conductive flexible connecting portion Contactable and / or contacted with ESD contacting means for electrically conductive contacting with a protective conductor.

Furthermore, the object is achieved by a cleaning system according to the invention, comprising a particle collecting device according to the invention and in particular particle analysis means for analyzing the particles absorbed by the particle collecting device and a further functional element. The functional element can be designed as a transport case, vacuum cleaner for generating the suction air volume flow or as a module of a modular module preferably designed as a multiple socket.

In an advantageous manner according to the invention, the particle collecting device comprises a first particle collecting unit for collecting particles from a suction air volume flow. The Saugluftvolumenstrom sucks soluble particles from a surface to be tested of a test specimen, in particular an electronic component or an electric machine, by a suction port having an end portion of a suction hose is guided over the surface for sucking the particles. In addition to the rigid or flexible end section, the suction hose comprises a flexible connecting section, via which the end section is connected to the particle-collecting unit in an intake-air-conducting manner. To avoid potential differences between the end portion of the suction hose and the test specimen, it is provided according to the invention that the end portion, in particular an axial end face of the end portion of the suction hose is electrically conductive and on the also electrically conductive flexible connecting portion is electrically connected to ESD contacting means of the particle collecting device in operative connection to realize an electrically conductive contact with a protective conductor, in particular designed as grounding cable. As a result, during operation, the end section is connected in an electrically conductive manner to the protective conductor, ie PE or a ground, whereby the, in particular parasitic, charging of the end section with charge carriers and thus the formation of a potential difference to the test body is avoided.

The inventive measures electrostatic discharges between the end portion of the suction hose and the surface of the specimen can be completely avoided, since according to the invention the formation of a potential difference is prevented by the electrical contact. This allows the invention of the technical testing of electronic components without the potential risk of partial or complete damage of the component by an electrostatic discharge between the test specimen and the end portion of the suction hose.

Furthermore, it is inventively provided that the end portion of the suction hose is formed by a, in particular detachably connectable to the flexible connection portion of the suction hose or, alternatively, permanently fixed thereto, preferably designed as a suction, suction. Preferably, the suction member may have a tapered inner periphery to produce a nozzle effect in the Saugluftvolumenstrom.

Due to the preferred detachable arrangement of differently shaped suction elements, an advantageous adaptation of the suction power or the size of the aspirated by the suction on the surface to be inspected suction can be achieved, which in addition to a wide application and a multiple collection of differently shaped particles of a to be tested Surface is enabled. In addition, an adaptation to the surface to be tested of the test piece can take place, which is not always flat, but may also be interlaced and / or have cavities.

In addition, it is provided according to the invention that the suction element comprises electrically conductive and flexible bristles which are arranged on the suction opening such that a scraping off of the surface of the test body results in particles adhering to the surface, in particular due to charge carriers, from the surface can be solved and absorbed by the Saugluftvolumenstrom in the suction hose.

In this case, it is advantageously provided according to the invention that a contacting of the electrically conductive bristles with the protective conductor is provided via the ESD contacting means through the flexible connection section of the suction hose, thereby advantageously eliminating all electrostatic discharges between the bristles and / or the suction element and the test body (surface). can be avoided.

The bristles preferably comprise a plastic material to which electrically conductive particles, in particular graphite, are mixed. However, a realization of the bristles of an electrically conductive polymer or a metal is also provided.

Further, it is also provided that the suction opening of the end portion of the suction hose has an end face, which is formed from or coated with an electrically conductive material, preferably an electrically conductive particles comprising plastic, an electrically conductive polymer or a metal. In this case, the electrically conductive end face is advantageously electrically conductively connected to the ESD contacting means via the flexible suction hose, whereby advantageously a potential difference between the end face of the end portion and the surface of the test body can be avoided. It is particularly preferred if the plastic is added to form the electrical conductivity graphite.

In a further development, it is provided that the intake element is designed as a plastic injection-molded part. This makes it possible to produce the end section in a manner suitable for large-scale production and also allows the admixing of the electrically conductive particles to adjust the electrical conductivity of the end section.

It is particularly expedient if the suction hose is electrically conductively connected to a housing of the particle collecting device for the electrically conductive contacting of an ESD contact of the ESD contacting means arranged on the housing. This advantageously makes it possible to ground the suction hose indirectly through the stationary housing of the particle collecting device. Thus, the ESD contact means must not be carried along with the suction hose when the test specimen with the end portion including the suction during sucking the particles, but may be formed stationary between the arranged on the housing ESD contact and the protective conductor.

Further, it is provided that the ESD contact is designed as a push-button receptacle for releasably fixing a push button, the end is arranged on an electrical connection cable of the ESD connection means, which is connectable to the protective conductor. Preferably, the protective conductor of a household and / or industrial socket, preferably designed as Schuko socket, tapped. Alternatively, however, the protective conductor, for example in the context of a domestic installation, can be tapped directly. Nevertheless, it is particularly preferred if the ESD contacting means comprise a plug which can be inserted into a household and / or industrial socket such that only an electrical contacting of the protective conductor takes place. For this purpose, the connecting pins for tapping the phase and the neutral conductor are either made of an insulator, preferably plastic, or not led away from the plug. This advantageously allows a simple electrical contacting of the ESD contacting means with the protective conductor, which is always the same in the standard household and / or industrial sockets. In addition, this requires no special electrical knowledge and prevented by the fixed predetermined Kontaktierungsstecker an incorrect contacting of the ESD contacting with any damage to the particle collection device, the test specimen and / or an operator.

A preferred optimization of the particle collecting device provides that the suction hose via a plug connection or a conical connection detachably suction air-conducting with a particle collecting device upstream stationary suction openings is connectable.

To realize the plug-in connection, it is provided, in particular, that the end of the suction hose is assigned a sleeve element which comprises a cylindrical outer circumference. In this case, it is further preferred if the sleeve element has on one side (at the end of the sleeve element, which is further away from the end of the suction hose in the axial direction A) a cylindrical projection, wherein the outer circumference of the protrusion extends along the outer circumference of the remaining sleeve element Radial axis at least partially circumferentially surmounted to limit the insertion depth at a plug-in movement through which the sleeve member is inserted into a designated receiving unit. It is further preferred if the intended receiving unit is realized as a hollow cylindrical connecting element which is designed to receive the sleeve element. It is preferably provided that there is an electrically conductive contact through the end face of the suction hose. Alternatively and / or additionally, it is also conceivable that the sleeve member is formed of an electrically conductive material, wherein an electrically conductive connection between the suction hose and the sleeve member and wherein it in the inserted state to an electrically conductive contact between the sleeve member and the receiving unit, in particular, the hollow cylindrical connecting element, comes to realize an (electrically) conductive connection between the suction hose (flexible connecting portion) and the particle collecting device and thus according to the invention to avoid the formation of potential differences.

In the case of a conical connection, it is preferably provided that the conicity of the conical connection has an angle between 0.2 ° to 3 °, preferably 0.3 ° to 1.6 ° to the axial extent. In addition, an embodiment is particularly preferred in which an inner cone receiving an outer cone is formed on the particle collecting unit and forms the stationary suction opening. Alternatively, an embodiment is conceivable in which the outer cone receiving inner cone is formed on the suction hose. The cone connection advantageously allows a simple and thus comfortable suction air-conducting coupling of the suction hose with the particle collecting unit. This allows the suction hose during transport quickly and easily detached from the particle collecting device. In addition, decapping is preferably provided, by means of which the openings of the cone connection or of the plug connection in the suction hose or on the particle collecting device can be closed during transport. This advantageously prevents contamination of the suction hose and / or the particle collecting device by additional particles, which could otherwise settle on the inner sides of the suction hose and / or the particle collecting device during transport and thus falsify the test result in a subsequent test of technical cleanliness.

Another design optimization provides that the releasable cone connection and / or the plug connection are assigned securing means, which preferably allows by a pivoting movement securing the suction hose against an axially aligned (and the insertion movement opposing) Transversalziehbewegung. By this constructive measure can be advantageously prevented accidental withdrawal, in particular loosening of the cone connection or the connector, the suction hose during sucking or scraping the surface of the specimen.

In a further development, it is additionally provided that the suction hose is designed to be multi-layered, with an inner, in particular innermost, layer, preferably polyvinyl chloride (PVC), which provides an inner surface which is distinguished by a particularly low surface roughness. The smoothest possible surface leads advantageously to the fact that little absorbed particles on Set inner circumference of the suction hose, which then can not be collected in the particle collecting unit and then analyzed, whereby the test result would be falsified. In addition to the inner layer, an outer, in particular outermost, layer is provided, which is formed, in particular, from an electrically conductive particle, in particular graphite, comprising plastic or from an electrically conductive polymer or from a metallic tubular element, whereby the electrical conductivity of the suction hose is ensured or . can also be influenced. In addition, if a flexible hose or a fabric hose made of metal or another electrically conductive fabric material, for. B. conductive plastic filaments is used and / or the suction hose is designed as a corrugated tube, wherein the suction hose is still flexible by the corrugated tube structure despite the use of rigid layer materials. Further, the use of flexible materials can also be provided for the formation of the suction tube, which are then reinforced by a special fabric structure in the stiffness. By this advantageous measure then a kinking and thus interrupting the Saugluftvolumenstroms can be prevented during the absorption of the particles.

Moreover, it is particularly advantageous if the electrical contacting between the flexible connection section of the suction hose and the suction element and / or the flexible connection section of the suction hose and the housing of the particle collecting device is realized by an axial projection of the flexible connection section (axial projection of the flexible and electrically conductive connection section) whereby a sleeve element arranged on the outer circumference of the flexible connection section, in particular made of an electrically nonconducting material, can be bridged when releasably arranging in the conical connection as an inner cone or realizing the plug connection by the electrically conductive suction hose (flexible connection section) projecting axially over the sleeve element, wherein an electrical connection conductive contacting despite the use of the sleeve member made of an electrically non-conductive (insulator) or poorly conductive material ermögli is being.

Alternatively, the sleeve member may also be made of an electrically conductive material, in which case the axial projection of the flexible connecting portion for electrical contacting is not absolutely necessary, but may be additionally provided.

In a further development, it is additionally provided that the first particle collecting unit is designed as a filter unit or as a centrifugal separator (cyclone) and preferably the particle collecting device also comprises a second particle collecting unit. The second particle collecting unit is preferably designed as a filter unit. In addition, it is particularly preferred if the centrifugal separator (cyclone) is arranged downstream of the suction hose, whereby the suction air volume flow containing the absorbed particles rotates in the centrifugal separator, whereby the particles can be hurled against a wall of the centrifugal separator and thereby can be separated from the suction air volume flow. Furthermore, the centrifugal separator comprises a collecting vessel, in particular detachably arranged on the centrifugal separator, for collecting the separated particles.

Downstream of the centrifugal separator, in particular via a connection hose which can be detachably arranged by means of cone connections or plug connections, the filter unit comprising a filter holder is provided. In the filter unit, the suction air volume flow flows through the filter, preferably made of a fabric material, wherein the residual particles contained in the suction air volume flow are collected in the filter. The advantageous suction-air-conducting series connection of the two particle collecting units enables a two-stage collection of particles contained in the suction air volume flow, wherein in the centrifugal separator, the majority of the particles are separated from the Saugluftvolumenstrom and then takes place in the downstream second filter unit collecting the residual particles. By this advantageous measure, clogging of the filter due to a heavily contaminated specimen and thus too many particles can be prevented and / or delayed, since a separation of the (large) particles takes place in the centrifugal separator. This advantageously also allows a combination of the two particle collecting units (centrifugal separator and / or filter unit) depending on the degree of contamination of the test specimen. A more detailed description of the functional scope of the two particle collecting units can be found in the aforementioned utility model of the applicant ( EN 20 2016 106 164 U1 ).

Furthermore, it is preferably provided that the connecting hose and the suction hose can be connected via the identical conical connection or plug-in connection to the particle collecting device so that the combination of the two particle collecting units of the particle collecting device (which is dependent on the degree of soiling) can be easily implemented. Dislocated differently, it is advantageously possible to connect the suction hose instead of the centrifugal separator (first particle collecting unit) directly to the filter unit (second particle collecting unit) via the intended cone or plug connection with the particle collecting device suction air.

In the context of the present invention, further protection is claimed for a system (cleaning system) in which a particle collecting device according to the invention, in particular with particle analysis means for analyzing the particles sucked up and collected by means of the particle collecting device, is combined, wherein the particle collecting device is assigned a further functional element.

In a further development, it is provided that the functional element is formed by a module, wherein the module can be combined and expanded with a plurality of further modules. A particularly preferred module is formed by a multiple plug. The module as a multiple plug offers on the outside at least one socket, preferably designed as a Schuko socket, which can be connected by means of a storable inside the module and there transportable extension cable with a permanently installed household and / or industrial socket, which preferably also is designed as a Schuko socket. This allows the advantageous contacting of the ESD contacting means via the module, which is electrically contacted by means of the extension cable with a permanently installed household and / or industrial socket, wherein in this case also the electrical contact with the ground (neutral) takes place. In addition, a clearly visible signal means is preferably arranged on the outside of the module that signals an applied voltage. This allows a quick visual inspection of whether the extension cable has been plugged into a functional household and / or industrial socket and thus whether there is a contact between the ESD contacting means and the protective conductor.

Developing further, the further functional element can be advantageously designed as a suitcase in which the particle collecting device for safe transport is stowed. In addition, it is preferably provided that the particle collecting device can be arranged in operation on the closed case and there releasably fixable with the case via fixing. This allows advantageous operation of the particle collecting device at different places of use, since parking means are always carried by the transport case. In addition, the increased arrangement of the particle collecting device enables a simplified operation and also protects the particle collecting device in operation from damage and contamination.

A further optimization provides that a module is formed by a vacuum cleaner, which can be brought into operative connection with the particle collecting device in such a way that the suction air volume flow can be generated by means of the vacuum cleaner. Advantageously, the vacuum cleaner can be arranged directly under the transport case of the particle collecting device and lock via fixing, which allows a particularly comfortable transport. For this purpose, transport rollers are also provided on the underside of the module. In addition or as an alternative to Saugluftvolumenstromzeugung by means of the vacuum cleaner and compressed air means may be present in a module that are designed such that an available Druckluftverteilsystem Saugluftvolumenstromzeugung can be used, preferably the particle collecting device comprises a venturi valve, via which the Saugluftvolumenstrom can be generated ,

Within the scope of the cleaning system, a module is preferably also provided which comprises a cloth preferably soaked in ethanol, preferably of paper or cloth and a sliding element comprising a holding element. The cloth is fixable via the retaining element, wherein the retaining element is arranged on the sliding means such that the cloth is axially pushed through the suction hose and / or the connecting hose. This advantageously makes it possible to clean the inside of the suction hose and / or of the connecting hose through the cloth. It is advantageously provided that the cloth is white, which adhering to the cloth particles are visible by a visual inspection of the cleaning person.

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawings.

• 1 eine perspektivische Darstellung einer nach dem Konzept der Erfindung ausgebildeten Partikelsammelvorrichtung, welche auf einem Transportkoffer angeordnet ist, wobei der Transportkoffer auf einem als Modul ausgebildeten Mehrfachstecker steht, der dann wiederum auf einem einen Saugluftvolumenstrom erzeugenden Staubsauger angeordnet ist,
• 2a u. 2b jeweils einen Saugschlauch mit unterschiedlichen Endabschnitten, wobei die 2a im Gegensatz zu der 2b eine nicht erfindungsgemäße Ausführungsform zeigt,
• 3 einen Querschnitt des Saugschlauchs und einer Konusverbindung und in
• 4 einen Querschnitt des Saugschlauchs und eines hohlzylindrischen Verbindungselements zur elektrisch leitenden Kontaktierung des Saugschlauchs über die Stirnseite der Grafit umfassenden äußeren Schicht des Saugschlauchs.

These show in

• 1 a perspective view of a trained according to the concept of the invention particle collecting device, which is arranged on a transport case, wherein the transport case is on a module designed as a multiple plug, which is then in turn arranged on a Saugluftvolumenstrom generating vacuum cleaner,
• 2a and , 2b each have a suction hose with different end portions, wherein the 2a in contrast to the 2 B a non-inventive embodiment shows
• 3 a cross section of the suction hose and a cone connection and in
• 4 a cross section of the suction hose and a hollow cylindrical connecting element for electrically conductive contacting of the suction hose on the front side of the graphite comprehensive outer layer of the suction hose.

In the figures, functionally equivalent or mutually equivalent elements and assemblies are identified by the same reference numerals.

In 1 is a ready-to-use particle collection device 1 shown. The particle collection device 1 is by means of fixing 3 detachable on a carrying case 2 arranged, whereby accidental dropping of the particle collecting device 1 is prevented. The transport case 2 stands on another module, that of a multiple socket module 4 is formed and four Schuko sockets 5 having. The Schuko sockets 5 can be used to power electrical loads as soon as an extension cord can be stowed and transported inside the module 6 in a household and / or industrial socket permanently installed at the place of use 7 is plugged. On the outside of the multiple socket module 4 , framed by two sockets each 5 , there is a light source 8th That lights up when the sockets 5 over the extension cable 6 with a household and / or industrial socket 7 is electrically contacted and also voltage at the sockets 5 of the multiple socket module 4 is applied. In the illustrated embodiment, the multiple socket module is 4 directly on a vacuum cleaner that suits the transport system 9 arranged. Again, a fixation of the two modules by means of releasable fixatives 3 , For easy transport points the vacuum cleaner 9 Rolls on its underside 10 by moving or simply transporting the stacked one over the fixing means 3 allows each other fixed modules. The vacuum cleaner suction hose 11 of the vacuum cleaner 9 is in releasable operative connection with the uppermost arranged particle collecting device 1 and is used to generate the Saugluftvolumenstroms. The particle collection device 1 has a first particle collection unit in the illustrated embodiment 12 and a second particle collection unit 13 on that over a connecting hose 14 are connected to each other with suction air. The first particle collection unit 12 has a centrifugal separator 15 on. The second particle collection unit 13 includes one in a filter holder 16 arranged fabric filters. The first particle collection unit 12 upstream of the intake air is an inlet opening 17 having end portion 18 and a flexible connection section 19 comprehensive suction hose 20 , where the suction hose 20 closer in 2a . 2 B . 3 and 4 is described. The end section 18 is advantageous over the flexible connection section 19 with a housing 21 the particle collection device 1 electrically connected. The housing 21 has an ESD contact 22 on, which is designed as a push-button receptacle and on the means of an end of a push button comprehensive electrically conductive connection cable 23 an electrically conductive contact with the protective conductor of a Schuko socket 5 of the multiple socket module 4 can be produced. This is the connection cable 23 a dummy plug 24 downstream, located in one of the Schuko sockets 5 of the multiple socket module 4 can be introduced, wherein in addition to a mechanical support only an electrical contact of the protective conductor takes place, so the phase current and the neutral conductor are not electrically tapped.

In the operation is over the vacuum cleaner 9 the suction air volume flow generated. Alternatively, an operation by compressed air means 29 possible, which are preferably transportable in another module. In operation by means of compressed air 29 can be used in the context of industrial manufacturing and not shown in the drawing Druckluftverteilsystem for generating the Saugluftvolumenstroms by the compressed air means 29 be coupled with this so that the Saugluftvolumenstrom can be generated by the Druckluftverteilsystem by means of a Venturi nozzle. Preferably, a silencer is provided for such operation, which allows a reduction in the noise level during operation.

The generated Saugluftvolumenstrom sucks particles from the surface of the specimen on by the intake 17 having suction hose 20 is guided over the surface of the specimen, wherein arranged on the surface of particles from the suction hose 20 be absorbed, then in one of the two particle collecting units 12 . 13 be separated again from the suction air volume flow. Through the grounding of the suction hose according to the invention 20 can parasitic charging of the end section 18 of the suction hose 20 be prevented, thereby according to the invention between the end portion 18 and the test specimen can build up any potential differences that could cause an electrostatic discharge.

Alternatively, the particle collecting device can be 1 operate only with a particle collection unit. This is the connection hose 14 removed and the suction hose 20 direct suction air conducting with the second particle collecting unit 13 connected. Because the suction hose 20 as well as the connection hose 14 via an identical cone connection 34 Suction-air conducting with the particle collecting device 1 are coupled, is for this alternative mode of operation of the particle collection device 1 no adapter for the suction-air-conducting connection of the suction hose 20 necessary.

2a shows a a suction opening 17 having end portion 18 and a flexible connection section 19 comprehensive suction 20 with which the particle collecting device 1 is operable, such an embodiment does not correspond to the subject matter of the main claim. The intake opening 17 has an end face 24 on that over the suction hose 20 with the ESD contacting agents 25 is electrically connected. The end section 18 is from a suction 26 formed, which is a taper of the inner circumference at the suction port 17 has, whereby a nozzle effect is generated. At the second end of the suction hose 20 has the flexible connection section 19 a on the outer circumference of the connecting portion 19 arranged sleeve element 27 on, as an inner cone 35 is formed and for the realization of a cone connection 34 with one on the case 21 the particle collection device 1 arranged outer cone 36 by a Transversalsteckbewegung suction air connected connectable (can be coupled). For electrical contacting of the suction hose 20 is the suction hose 20 so axially to the sleeve member 27 about that, despite a manufacturing of the sleeve element 27 from a non-electrically conductive material (insulator) an electrical contact of the suction hose 20 with the particle collection device 1 is possible. The exact structure of the cone connection 34 is in 3 described.

In 2 B is the suction hose 20 to 2a shown, but now with a flexible bristle 28 having suction 26 , The flexible bristles 28 consist of an electrically conductive material and are so around the suction port 17 arranged that when painting the surface of the specimen with the bristles 28 be solved on the surface of the test specimen adhering particles, which then by the Saugluftvolumenstrom from the suction hose 20 can be sucked up and then in one of the particle collecting units 12 . 13 can be separated from the suction air volume flow.

3 shows a cross section of the suction hose 20 and the cone connection 34 through the suction hose 20 with the particle collection device 1 can be connected to the suction air. The cross section of the suction hose 20 illustrates the multilayer structure of the suction hose 20 , where the suction hose 20 an inner layer 30 and an outer layer 31 includes. The inner layer 30 consists of polyvinyl chloride (PVC) and is optimized with regard to the smoothest possible surface, so that during operation as few particles as possible sucking on the inner circumference of the suction hose 20 fix. The outer layer 31 consists of a plastic, which is mixed to form the electrical conductivity graphite. Furthermore, the suction hose 20 to reinforce its structure (stiffness) a fabric material 32 assigned. End of the suction hose 20 , directly on the outside is the sleeve element 27 arranged, which is the inner cone 35 the cone connection 34 forms. The sleeve element 27 is so on the outer circumference of the suction hose 20 arranged that the suction hose 20 the sleeve element 27 surmounted axially. For the suction-air-conducting connection (contacting) of the suction hose 20 this will be the inner cone 35 forming sleeve element 27 in the outer cone 36 stuck, which is possible by a Transversalsteckbewegung. Because the suction hose 20 axially from the sleeve element 27 survives, there is an electrical contact of the suction hose 20 with the outer cone 36 , This advantageously allows the sleeve element 27 may be formed of an electrically non-conductive material (insulator). To the accidental release of the cone connection 34 to prevent absorption, are the cone connection 34 preferably on the outer cone 36 arranged, pivotable securing means 33 assigned as soon as the suction hose 20 with the particle collection device 1 is connected to the intake air, preferably positively, to the sleeve member 27 can be created and thus the (accidental) release of the cone connection 34 through one on the suction hose 20 prevent acting transverse pulling movement.

In 4 is one to the out 3 known cone connection 34 alternative embodiment for the suction air-conducting connection and the simultaneous electrically conductive contacting of the suction hose 20 with the particle collection device 1 represented, wherein a plug connection by means of a hollow cylindrical connecting element 37 is realized.

In the 4 is, according to the 3 , a cross section of the inner layer 30 and the outer layer 31 comprehensive suction hose 20 shown. Again, the end is on the suction hose 20 a sleeve element 38 provided, wherein this comprises a cylindrical outer periphery, on the end along all the radial axes R, a circumferential projection 39 is provided. The sleeve element 38 is so on the outer circumference of the suction hose 20 provided that the suction hose 20 the sleeve element 38 surmounted axially. For the suction-air-conducting contact of the suction hose 20 with the particle collection device 1 becomes the sleeve element 38 by a plug-in movement in the hollow cylindrical connecting element 37 introduced, it by the provided along the radial axis R circumferential projection 39 to a limitation of the insertion movement and thus to a defined positioning of the suction hose 20 comes. At this defined insertion depth, an electrical contacting of the suction hose 20 over the front side 40 the graphite outer layer 31 of the suction hose 20 to an electrically conductive connection to ensure over the plug connection. This is the front page 40 on a berth 41 the hollow cylindrical connecting element 37 pressed, which also comprises an electrically conductive material. This allows the realization of the sleeve member 38 made of a non-electrically conductive material. For fixing the sleeve element 38 in the defined position are locking means 42 provided in the outer periphery of the sleeve member 38 are provided.

LIST OF REFERENCE NUMBERS

1

Particle collection device

2

suitcase

3

fixer

4

Multiple socket module

5

Schuko socket

6

extension cable

7

Household and / or industrial socket

8th

Lamp

9

vacuum cleaner

10

role

11

Suction hose of the vacuum cleaner

12

first particle collecting unit

13

second particle collection unit

14

connecting hose

15

cyclone

16

filter holder

17

suction

18

end

19

flexible connection section

20

suction

21

casing

22

ESD contact

23

connection cable

24

front

25

ESD contacting

26

suction

27

sleeve member

28

bristles

29

Pneumatic means

30

inner layer

31

outer layer

32

fabric material

33

securing means

34

conical connection

35

inner cone

36

outer cone

37

hollow cylindrical connecting element

38

Sleeve element with cylindrical outer peripheral surface

39

Got over

40

Front side of the outer layer

41

Bearing surface for electrically conductive contacting

42

locking

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 202016106164 U1 [0004, 0027]

Claims (16)

Particle collecting device (1) for collecting particles from surfaces for particle analysis during a test of the technical cleanliness of test specimens, in particular electronic assemblies and machines, comprising a first particle collecting unit (12) for collecting particles from a suction air volume flow via a suction opening (17) having end portion (18) and a flexible connection portion (19) comprehensive suction hose (20) is sucked, characterized in that the end portion (18) of the suction hose (20) is electrically conductive and via the likewise electrically conductive flexible connecting portion ( 19) is electrically conductively contacted and / or contacted with ESD contacting means (25) for electrically conductive contacting with a protective conductor, wherein the end portion (18) of a, in particular releasably connectable to the flexible connecting portion (19), preferably as a suction nozzle e formed, suction element (26) is formed and wherein the suction element (26) has electrically conductive and flexible bristles (28) for wiping the test body. Particle collecting after Claim 1 , characterized in that the suction opening (17) having end face (24) of the end portion (18) with and / or of an electrically conductive material, preferably an electrically conductive particles comprising plastic, an electrically conductive polymer or a metal, coated or formed is. Particle collecting after Claim 1 , characterized in that the suction element (26) is designed as a plastic injection-molded part. Particle collecting device according to one of Claims 1 to 3 , characterized in that the suction hose (20) is electrically conductively connected to a housing (21) of the particle collecting device (1) for contacting an ESD contact (22) of the ESD contacting means (25) arranged on the housing (21), in particular detachably, connected and / or connectable. Particle collecting after Claim 4 , characterized in that the ESD contact (22) as a push button, via an electrically conductive connection cable (23) of the ESD connection means (25) with the protective conductor, in particular via a household and / or industrial socket (7) is contacted , Particle collecting device according to one of Claims 1 to 5 , characterized in that the suction hose (20) comprises a sleeve member (38) having a cylindrical outer periphery, wherein the sleeve member (38) for suction air connecting the suction hose (20) with the particle collecting device (1), in particular by a plugging movement, in a hollow cylindrical connecting element (37) of the particle collecting device (1) can be inserted. Particle collecting device according to one of Claims 1 to 5 , characterized in that the suction hose (20) via a cone connection (34) releasably suction air conducting with a particle collecting device (1) upstream stationary suction port is connectable. Particle collecting after Claim 6 or 7 , characterized in that the releasable cone connection (34) or the hollow cylindrical connecting element (37), in particular pivotable, securing means (33) are associated for securing the suction hose (20) against an axially aligned Querversziehbewegung. Particle collecting device according to one of Claims 1 to 8th , characterized in that the suction hose (20) is formed with a multilayer having an inner surface providing inner layer (30), in particular of polyvinyl chloride (PVC), and an outer layer (31), in particular of plastic with admixture of electrically conductive particles from electrically conductive polymers or of a metallic hose member to ensure electrical conductivity. Particle collecting device according to one of Claims 1 to 9 , characterized in that the electrical contact between the flexible connecting portion (19) and the suction element (26) and / or the flexible connecting portion (19) and the housing (21) is realized via an axial projection of the flexible connecting portion (19) via a on the outer circumference of the flexible connecting portion (19) arranged sleeve member (27), in particular of an electrically non-conductive material, for producing a, in particular detachable connection to the suction element (26) or housing (21). Particle collecting device according to one of Claims 1 to 10 , characterized in that the particle collecting device (1) for collecting particles is associated with a second particle collecting unit (13), wherein the first particle collecting unit (12) is designed as a filter unit or as a centrifugal separator and the second particle collecting unit (13) is designed as a filter unit. A cleaning system comprising a particle collecting device according to any one of Claims 1 to 11 and in particular particle analysis means for analyzing the particles sucked up by means of the particle collecting device (1), characterized in that the particle collecting device (1) comprises a further functional element. Cleaning system after Claim 12 , characterized in that the further functional element is designed as a module, wherein, in particular a plurality of modules form a transport system which can be supplemented and expanded by further modules, wherein a module preferably comprises a multiple plug (4). Cleaning system according to one of Claims 12 or 13 , characterized in that the further functional element is designed as a suitcase (2) in which the particle collecting device (1) can be transported, wherein the particle collecting device (1) can be arranged on the case (2) for better accessibility and then via fixing means (3). is detachably fixable. Cleaning system according to one of Claims 11 to 14 , characterized in that a module is formed by a vacuum cleaner (9) which is in operative connection with the particle collecting device (1) such that the suction air volume flow can be generated. Cleaning system according to one of Claims 11 to 15 , characterized in that a module, in particular soaked in ethanol, cloth, preferably made of paper or cloth, a holding element and sliding means, wherein the cloth is fixable by means of the holding member, and on the holding element, the sliding means are arranged such that the cloth axially through the suction hose (20) can be pulled through, whereby the inside of the suction hose (20) of particles is cleanable.

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