EP1561037A1 - Fan, in particular for a device - Google Patents

Fan, in particular for a device

Info

Publication number
EP1561037A1
EP1561037A1 EP03753562A EP03753562A EP1561037A1 EP 1561037 A1 EP1561037 A1 EP 1561037A1 EP 03753562 A EP03753562 A EP 03753562A EP 03753562 A EP03753562 A EP 03753562A EP 1561037 A1 EP1561037 A1 EP 1561037A1
Authority
EP
European Patent Office
Prior art keywords
fan
recess
electrical line
hub
fan according
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.)
Granted
Application number
EP03753562A
Other languages
German (de)
French (fr)
Other versions
EP1561037B1 (en
Inventor
Norbert Weisser
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.)
Ebm Papst St Georgen GmbH and Co KG
Original Assignee
Ebm Papst St Georgen GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ebm Papst St Georgen GmbH and Co KG filed Critical Ebm Papst St Georgen GmbH and Co KG
Publication of EP1561037A1 publication Critical patent/EP1561037A1/en
Application granted granted Critical
Publication of EP1561037B1 publication Critical patent/EP1561037B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0693—Details or arrangements of the wiring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/58—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable
    • H01R13/5804—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable comprising a separate cable clamping part
    • H01R13/5812—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable comprising a separate cable clamping part the cable clamping being achieved by mounting the separate part on the housing of the coupling device

Definitions

  • the invention relates to a fan, in particular a device fan.
  • the latter has a hub, a fan housing connected to the hub, which limits an air passage opening provided in the fan to the outside, a fan wheel which is rotatably arranged in the air passage opening, a motor arranged on the hub for driving the fan wheel, and an electrical connection , which leads from the motor to the fan housing and has at least one electrical line.
  • So-called strain relief must be provided for such lines. They are usually soldered to a circuit board of the motor, and this solder connection is not permanently loadable and can be damaged or destroyed by mechanical pull, which is why such a train must be stopped before e.g. can reach the circuit board.
  • the flexible line can be deflected by at least two points by a certain angle, as a result of which the tensile force is absorbed in the region of these deflections, so that the part of the flexible line behind it, which leads to the motor, remains free of draft. This prevents that during transport, installation, and during the operation of such a fan, a tensile force via the electrical line inside the fan and on the contact points or solder points or plug contacts and e.g. is transferred to the circuit board of the motor.
  • the strain relief can be achieved, for example, by threading the line into fixed deflections. If you thread a flexible cable into locking lugs or constrictions, it will be held there permanently.
  • the electrical line is threaded through an opening in the flange and then secured by inserting a holder and thereby permanently held. If a plug is attached to such a line, it must not be larger than the opening in the flange, since otherwise it cannot be threaded through this opening. In such a case, one proceeds either by attaching the plug to the motor only after the line has been installed, or by soldering the line provided with a plug to the motor circuit board only after it has been installed, but this increases the installation time and the Assembly costs increased.
  • this object is achieved by the subject matter of patent claim 1.
  • a holding member which can be inserted into a recess in the fan housing and locked there, it is achieved that e.g. a flexible line can be inserted in the recess provided for this purpose in a simple manner before the mounting of this holding member, that is, it does not need to be threaded, and that it is deflected only when the holding member is installed.
  • a cable fixed in this way - without a plug - can only be removed from the strain relief by either removing the holding element again or by pulling the flexible cable out of the deflections along its entire length.
  • a flexible cable, to which a plug is attached, can only be removed from the strain relief by removing the holding member from its latching. It is therefore very advantageous that the electrical line does not have to be threaded into the at least one deflection, but that it is deflected when the holding member is inserted and locked, and that the deflection necessary for strain relief is automatically given in the locked position of the holding member.
  • the procedure is such that, in the locked state, the holding member deflects the electrical line at two points by a predetermined minimum angle in order to effect strain relief. This results in a very safe strain relief without the need for an additional one during assembly Effort would be necessary.
  • the invention also ensures that the assembly time is independent of the length of the electrical line, and that lines, at the end of which a plug is attached, can be easily installed.
  • Such a support member has the advantage that the electrical line does not need to be threaded there, but that it can simply be placed on the support member, which simplifies assembly.
  • FIG. 1 is a spatial representation of a preferred embodiment of a fan according to the invention before final assembly
  • FIG. 1 is an exploded view of the fan of FIG. 1,
  • FIG. 3 is a plan view of the air outlet side of the fan of FIG. 1,
  • FIG. 5 is a side view of a latchable holding member 80, seen in the direction of arrow V of FIG. 7,
  • FIG. 7 is a plan view, seen in the direction of arrow VII of FIG. 5,
  • FIG. 8 is a schematic representation of the holding member 80 of FIG. 5 in the assembled state
  • FIG. 9 is a sectional view taken along the line IX-IX of FIG. 11, 10 is a plan view of a corner of the fan, in which a holding member 80 is mounted,
  • FIG. 11 shows a section, seen along the line Xl-Xl of FIG. 10, that is to say analogously to FIG. 4, but with the holding element and the flexible line 52, and
  • Fig. 1 shows a spatial representation of a so-called device fan 20.
  • This is shown here as an example as a diagonal fan, which has advantages for some applications because it results in a more favorable fan characteristic, i.e. if e.g. a filter is clogged and therefore the flow rate dV / dt (flow rate) of the fan 20 drops, the pressure ⁇ pf (static pressure) generated in a diagonal fan rises more than in the case of an axial fan, which represents a safety reserve for the user, especially if when a high pressure is required with a large amount of air.
  • FIG. 2 shows the structure of the fan 20 in an exploded view.
  • This has a fan housing 22, which has approximately the shape of a frustoconical tube 24, on the two ends of which fastening flanges 26, 28 are provided.
  • the direction of flow of the air is shown at 30 in FIG. 1.
  • the inflow side of the fan 20 is designated 32, the outflow side 34.
  • the fan 20 has a motor 36, the stator of which is indicated by dashed lines in FIGS. 1 to 3 and which drives a fan wheel 38 with fan blades 40.
  • the motor 36 is preferably an electronically commutated two-phase external rotor motor, in which the fan wheel 38 is attached directly to the external rotor.
  • the shape of the fan blades 40 is adapted to the conical shape of the inside of the tube 24.
  • the fan wheel 38 is frustoconical on its outer side 39, as indicated in FIG. 2, and forms together with the frustoconical tube 24 has an air passage opening 41. This has a smaller diameter on the air inlet side 32 than on the air outlet side 34. Likewise, the fan wheel 38 on the air inlet side 32 has a smaller diameter, which increases in the direction of the air outlet side 34.
  • a mounting flange 44 also referred to below as a hub, is used to mount the motor 36 and is connected to the fan housing 22 via thin retaining webs 46.
  • This is preferably done by screw connections, which are indicated in Fig. 1 to 3 at 48.
  • the webs 46 have widenings 21 at their ends, which fit into corresponding recesses 23 in the fan housing 22, cf. 1 to 3.
  • Two diametrically opposite recesses 23 each have a centering pin 25 which fits in a form-fitting manner in a corresponding recess 27 of the associated widening 21 and thus centers the hub 44 exactly in the conical tube 24.
  • the screws 48 are used only for attachment, but not for centering. This is a very advantageous type of fastening, also with a view to automating production.
  • a shortened web 50 is provided on the hub 44, the function of which is to support a flexible electrical connecting line 52 of the motor 36, which e.g. can be designed as a multi-core sheathed cable.
  • the flexible line 52 comes from the motor 36 through a lateral opening 49 of the hub 44, where it e.g. is soldered to a circuit board (not shown), is then inserted into a guide groove 53 provided on the web 50, and is then guided further out to the fan housing 22, where a so-called strain relief for the line 52 is provided, which will be described below.
  • the motor 36 is fixedly connected to the hub 44 via retaining claws, not shown, and the webs 46, 50 are preferably formed in one piece with the hub 44.
  • Fig. 1 the direction of rotation of the fan 20 shown at 56 is indicated.
  • connection line 52 of the fan 20 usually contains a plurality of flexible insulated lines, preferably referred to as so-called strands, each of which is composed of a plurality of thin wires, which are covered by an insulating material.
  • strands flexible lines or "strands" are used, for example, in the form of multi-core sheathed cables for the electrical connection of irons or televisions.
  • a fan 20 requires two lines for supplying an operating voltage. Other lines are often provided, for example for a speedometer signal or an alarm signal. All of these flexible lines must be fast and, above all, securely attached when installing the fan 20, as will be described below.
  • the fan housing 22 viewed in the direction of the axis of rotation of the motor 36 designated by 60 (FIG. 2), has an approximately rectangular and in particular square outline with four corners, on which holes 62 are provided for fastening the fan 20 ,
  • the corner 64 which is shown at the front right in FIGS. 1 to 3, there is a recess 66.
  • the tube 24 is provided on its outside with a flat widening 68, which is preferably approximately parallel to the axis of rotation 60 and transverse to the corner 64 runs.
  • At least one of the flanges 26, 28 has, following this widening 68, a recess which is designated 28A for the flange 28 and 26A for the flange 26.
  • the recesses 26A, 28A are preferably substantially aligned with one another so that the flexible line 52 can be passed through it in the axial direction, that is to say approximately parallel to the axis of rotation 60, cf. Fig. 1.
  • the flanges 26, 28 are connected to one another by a connecting member 69, the shape and position of which can be clearly seen from FIGS. 1 to 3. Its function in the assembly of the flexible line 52 is described below.
  • FIG. 3 shows a plan view of the outflow side of the fan 20.
  • the five fan blades 40 and their shape which is characteristic of a diagonal fan can be seen very well.
  • the concave ends 72 of the blades 40 are located on the suction side 32. Furthermore, the shape of the three webs 46 and their connections 48 to the fan housing 22 can be clearly seen. The shape of the shortened web 50 and the channel 53 provided on it can also be seen , in which the at least one flexible line 52 is inserted in the manner shown. This channel 53 extends only over part of the air passage cross-section 41, for example over a third of its radial extent as shown. It can also be seen that the flat widening 68 merges into a projection 74 at its right end in FIG. 3, on which a latching is possible. At its left end, it merges into an analog projection 76, the function of which is explained below.
  • the flexible line 52 extends from the motor 36 over the trough 53 and through the recess 70 of the frusto-conical tube 24 to the two recesses 28A and 26A of the flanges 28 and 26, respectively.
  • FIG. 4 represents a section through the specified part of FIG. 3.
  • FIG. 5 shows a holding member 80, seen in the direction of arrow V of FIG. 7, that is to say in a side view.
  • Fig. 6 shows a section, seen along the line VI-VI of Fig. 5, and
  • Fig. 7 shows a plan view of the holding member 80, viewed in the direction of arrow VII of Fig. 5.
  • Figs. 12 to 15 show this Holding member 80 in various perspective views to facilitate understanding of its shape.
  • the holding member 80 has a substantially flat base part 82, which is shown in plan view in FIGS. 6 and 7 and which serves to latch the holding member 80 in the corner 64 of the fan 20 in the recess 66 there.
  • a hook 84 which, according to FIG. 8, engages behind the projection 76 of the fan housing 22 in the assembled state.
  • the holding member 80 has a releasable, resilient latching hook 86 which, according to FIG. 8, can be latched onto the projection 74 of the fan housing 22.
  • 9 is That is, the holding member 80 is pushed into the recess 66 from the left until it is held on the projections 74, 76 in the manner shown in FIGS. 8 and 9.
  • FIG. 5 there is a roof part 90 above the base part 82, which is connected to the base part 82 at its end region on the left in FIG. 5 via a slope 92.
  • the roof part 90 is wider at its upper regions in FIGS. 6 and 7 than the base part 82 and forms a boundary wall 94 there, which runs perpendicular to the base part 82 and whose shape and position can be clearly seen from FIGS. 5 and 6.
  • the roof part 90 is also connected to the base part 82 via a deflection member 96 at a point approximately in the middle thereof. As shown in FIGS. 8 to 11, the deflecting member 96 serves to deflect the flexible line 52 by a certain minimum angle after the holding member 80 has been inserted into the fan housing 22.
  • the roof part 90 has a raised section 98 which, according to FIGS. 8, 9, bears against the part 69 with a prestress in the assembled state, which prevents the holding member 80 from disengaging when pulled by detaching from the position 74 , Disengaging is possible, however, by pushing the holding member 80 with one hand to the right in FIG. 8 or 9 and then bending the resilient latching hook 86 upward with the other hand and then pulling the holding member 80 out of the recess 66 by hand to the left pushes or pulls.
  • the holding member 80 is preferably made of a resilient plastic.
  • the roof part 90 covers only a part of the base part 82 in the lower section.
  • the flexible line 52 can be guided through the area 99 left free. If this is not desired, the area 99 can also be completely covered by the roof part 90.
  • Fig. 9 shows the holding member 80 in the assembled state in the recess 66 in the corner 64 of the fan housing 22.
  • the holding member 80 is locked in this position after its assembly, but can be unlocked by lifting the resilient locking member 86 and pulled out of the recess 66 to the left become.
  • 10 shows the same corner 64 of the fan housing 22, but in a top view, that is to say not in a sectional view.
  • the lateral recess 28A of the fan housing 22 is largely closed by the section 94 of the holding member 80, so that a guide opening is formed there for the flexible line 52, as is also clearly shown in FIG. 11.
  • the flexible line 52 is pushed to the right in FIG. 11 by the deflecting member 96 when the holding member 80 is pushed in, so that it is deflected once at a first deflecting point 106 where it leaves the recess 70.
  • the flexible line 52 is deflected by the deflecting member 96 at a second deflecting point 108 by an angle which, depending on the application, can be between approximately 60 and 110 °.
  • the deflection angle at the second deflection point 108 is approximately 60 °
  • the flexible line 52 is led out of the fan 20 in a direction 52B, namely through the recess 26A, the deflection angle at point 108 is greater than 90 °.
  • the flexible line 52 can also be led out in a direction which is denoted by 52C in FIG. 9, wherein it bears against the part 69 of the fan housing 22.
  • the line 52 then runs through the free space 99 shown in FIG. 7. If this possibility is to be excluded, the free space 99 is completely covered by the roof part 90 by making this roof part 90 correspondingly wider.
  • the necessary strain relief takes place on that side of the flexible line 52 that leads to the motor 36.
  • the assembly is very simple, ie the flexible line 52 is simply inserted into the fan 20 as shown in FIG. 1, and then the holding member 80 is inserted into the recess 66 and locked there.
  • the two deflection points 106, 108 (FIG. 11) are created automatically, as a result of which the strain relief is produced.
  • a plug can also be fastened directly in or on the holding member 80, or the holding member 80 itself can be used as Plug be formed, and this plug can be inserted into the recess 66 and locked there.
  • At least one flexible line 52 can be inserted directly into corresponding openings in the fan 20, i.e. it does not have to be threaded, and it is only deflected at the points 106, 108 during the mounting of the holding member 80.
  • the flexible line 52 if no plug is attached to it, can only be removed from the strain relief either by unthreading its entire free length or by disassembling the holding member 80.
  • a flexible line 52, to which a plug is attached, can only be removed from the strain relief by unlocking the holding member 80.
  • the at least one flexible line 52 is deflected simultaneously at two points 106, 108 (FIG. 11), so that in the end position of the holding member 80 the number and type of deflections necessary for strain relief are automatically obtained reached.
  • Threading the flexible line 52 into fixed deflections on the housing is eliminated by the invention, which shortens the assembly time accordingly.
  • the invention works in the same way also when using several flexible lines or such lines that are inserted in an insulating tube and for which a strain relief is necessary.
  • the part 69 stabilizes the two flange parts 26 and 28 relative to one another in the area of the corner 64. This is advantageous when fastening the fan 20 via its flanges 26, 28, e.g. with a push-through fitting.
  • Analog reinforcements can be provided in the area of the other corners, as clearly shown in FIG. 1.
  • the invention is particularly advantageous in combination with a diagonal fan, but can also be used with advantage in the case of axial fans.
  • multiple variations are possible within the scope of the invention. So you could e.g. form the shortened web 50 so long that it can be fastened to the corner 64 of the fan housing 22, for which purpose it would have to have a somewhat different shape than the webs 46.
  • the invention can also be used in the same way where a fan is connected Cables are used that are relatively rigid, but flexible, so no strands. Such and other modifications are within the scope of the invention.

Abstract

A fan has a hub and a fan housing connected to the hub. The fan housing delimits an air passage of the fan outwardly. A fan wheel is connected to the hub and rotatably arranged in the air passage. A motor is arranged on the hub for driving the fan wheel. An electrical connection with at least one flexible line is connected to the motor and extends from the motor to the fan housing. A recess is provided within the fan housing and the flexible line extends from the motor to the recess. A holding member locks in place in the recess and deflects the flexible line at least at one deflection location about a predetermined minimum angle to thereby effect strain relief on the portion of the flexible line extending from the deflection location to the motor.

Description

Lüfter, insbesondere Gerätelüfter Fans, especially device fans
Die Erfindung betrifft einen Lüfter, insbesondere einen Gerätelüfter. Letzterer hat eine Nabe, ein mit der Nabe verbundenes Lüftergehäuse, welches eine im Lüfter vorgesehene Luftdurchtrittsoffnung nach außen hin begrenzt, ferner ein Lüfterrad, welches in der Luftdurchtrittsoffnung drehbar angeordnet ist, einen an der Nabe angeordneten Motor zum Antrieb des Lüfterrads, und eine elektrische Verbindung, welche vom Motor zum Lüftergehäuse führt und mindestens eine elektrische Leitung aufweist.The invention relates to a fan, in particular a device fan. The latter has a hub, a fan housing connected to the hub, which limits an air passage opening provided in the fan to the outside, a fan wheel which is rotatably arranged in the air passage opening, a motor arranged on the hub for driving the fan wheel, and an electrical connection , which leads from the motor to the fan housing and has at least one electrical line.
Bei derartigen Leitungen muss eine sogenannte Zugentlastung vorgesehen werden. Sie werden nämlich gewöhnlich an einer Leiterplatte des Motors angelötet, und diese Lötverbindung ist nicht dauerhaft belastbar und kann durch mechanischen Zug beschädigt oder zerstört werden, weshalb ein solcher Zug gestoppt werden muss, bevor er z.B. die Leiterplatte erreichen kann.So-called strain relief must be provided for such lines. They are usually soldered to a circuit board of the motor, and this solder connection is not permanently loadable and can be damaged or destroyed by mechanical pull, which is why such a train must be stopped before e.g. can reach the circuit board.
Für solche Zugentlastungen gibt es verschiedene Möglichkeiten. Man kann die flexible Leitung an mindestens zwei Stellen um einen bestimmten Winkel umlenken, wodurch die Zugkraft im Bereich dieser Umlenkungen absorbiert wird, so dass der dahinter liegende Teil der flexiblen Leitung, der zum Motor führt, zugfrei bleibt. Dadurch wird verhindert, dass beim Transport, beim Einbau, und während des Betriebs eines solchen Lüfters eine Zugkraft über die elektrische Leitung ins Innere des Lüfters und auf die Kontaktierungsstellen oder Lötstellen oder Steckerkontaktierungen und z.B. auf die Leiterplatte des Motors übertragen wird.There are various options for such strain reliefs. The flexible line can be deflected by at least two points by a certain angle, as a result of which the tensile force is absorbed in the region of these deflections, so that the part of the flexible line behind it, which leads to the motor, remains free of draft. This prevents that during transport, installation, and during the operation of such a fan, a tensile force via the electrical line inside the fan and on the contact points or solder points or plug contacts and e.g. is transferred to the circuit board of the motor.
Um eine solche Zugentlastung dauerhaft zu gewährleisten, muss sichergestellt sein, dass die Leitung an diesen Umlenkstellen festgehalten wird.In order to guarantee such strain relief permanently, it must be ensured that the line is held at these deflection points.
Bei Lüftern mit Kunststoffgehäusen erreicht man die Zugentlastung z.B. dadurch, dass man die Leitung in feststehende Umlenkungen einfädelt. Fädelt man nämlich eine biegsame Leitung in Rastnasen oder Verengungen ein, so wird sie dort dauerhaft gehalten. Bei Metallgehäusen wird die elektrische Leitung durch eine Öffnung im Flansch durchgefädelt und dann durch Einschieben eines Halters gesichert und dadurch dauerhaft festgehalten. Ist an einer solchen Leitung ein Stecker befestigt, so darf dieser nicht größer sein als die Öffnung im Flansch, da er sonst durch diese Öffnung nicht durchgefädelt werden kann. In einem solchen Fall geht man so vor, dass man entweder den Stecker erst nach Montage der Leitung an dieser befestigt, oder dass man die mit einem Stecker versehene Leitung erst nach ihrer Montage an der Leiterplatte des Motors anlötet, was aber die Montagezeit verlängert und die Montagekosten erhöht.For fans with plastic housings, the strain relief can be achieved, for example, by threading the line into fixed deflections. If you thread a flexible cable into locking lugs or constrictions, it will be held there permanently. In the case of metal housings, the electrical line is threaded through an opening in the flange and then secured by inserting a holder and thereby permanently held. If a plug is attached to such a line, it must not be larger than the opening in the flange, since otherwise it cannot be threaded through this opening. In such a case, one proceeds either by attaching the plug to the motor only after the line has been installed, or by soldering the line provided with a plug to the motor circuit board only after it has been installed, but this increases the installation time and the Assembly costs increased.
Es ist deshalb eine Aufgabe der Erfindung, einen neuen Lüfter bereit zu stellen.It is therefore an object of the invention to provide a new fan.
Nach der Erfindung wird diese Aufgabe gelöst durch den Gegenstand des Patentanspruchs 1. Durch die Verwendung eines in eine Ausnehmung des Lüftergehäuses einführbaren und dort verrastbaren Halteglieds erreicht man, dass z.B. eine biegsame Leitung vor der Montage dieses Halteglieds in einfacher Weise in die hierfür vorgesehene Ausnehmung eingelegt werden kann, also nicht eingefädelt zu werden braucht, und dass sie erst bei der Montage des Halteglieds umgelenkt wird. Nach der Montage des Halteglieds kann eine so fixierte Leitung - ohne Stecker - nur noch aus der Zugentlastung entfernt werden, indem man entweder das Halteglied wieder entfernt, oder indem man die flexible Leitung über ihre ganze Länge aus den Umlenkungen ausfädelt. Eine biegsame Leitung, an der ein Stecker befestigt ist, kann nur noch aus der Zugentlastung entfernt werden, indem man das Halteglied aus seiner Verrastung entfernt. Sehr vorteilhaft ist also, dass die elektrische Leitung in die mindestens eine Umlenkung nicht eingefädelt werden muss, sondern dass sie beim Einschieben und Verrasten des Halteglieds umgelenkt wird, und dass in der verrasteten Stellung des Halteglieds die für eine Zugentlastung notwendige Umlenkung automatisch gegeben ist.According to the invention, this object is achieved by the subject matter of patent claim 1. By using a holding member which can be inserted into a recess in the fan housing and locked there, it is achieved that e.g. a flexible line can be inserted in the recess provided for this purpose in a simple manner before the mounting of this holding member, that is, it does not need to be threaded, and that it is deflected only when the holding member is installed. After the mounting of the holding element, a cable fixed in this way - without a plug - can only be removed from the strain relief by either removing the holding element again or by pulling the flexible cable out of the deflections along its entire length. A flexible cable, to which a plug is attached, can only be removed from the strain relief by removing the holding member from its latching. It is therefore very advantageous that the electrical line does not have to be threaded into the at least one deflection, but that it is deflected when the holding member is inserted and locked, and that the deflection necessary for strain relief is automatically given in the locked position of the holding member.
In bevorzugter Weise geht man so vor, dass das Halteglied im verrasteten Zustand die elektrische Leitung an zwei Stellen um einen vorgegebenen Mindestwinkel umlenkt, um die Zugentlastung zu bewirken. Dies ergibt eine sehr sichere Zugentlastung, ohne dass hierfür bei der Montage ein zusätzlicher Aufwand notwendig wäre. Durch die Erfindung erreicht man zudem, dass die Montagezeit unabhängig von der Länge der elektrischen Leitung wird, und dass auch Leitungen, an deren Ende ein Stecker befestigt ist, problemlos montiert werden können.In a preferred manner, the procedure is such that, in the locked state, the holding member deflects the electrical line at two points by a predetermined minimum angle in order to effect strain relief. This results in a very safe strain relief without the need for an additional one during assembly Effort would be necessary. The invention also ensures that the assembly time is independent of the length of the electrical line, and that lines, at the end of which a plug is attached, can be easily installed.
Eine sehr vorteilhafte Weiterbildung ist Gegenstand des Patentanspruchs 3. Ein solches Stützglied hat den Vorteil, dass die elektrische Leitung dort nicht eingefädelt zu werden braucht, sondern dass man sie einfach auf das Stützglied auflegen kann, was die Montage vereinfacht.A very advantageous development is the subject of claim 3. Such a support member has the advantage that the electrical line does not need to be threaded there, but that it can simply be placed on the support member, which simplifies assembly.
Weitere Einzelheiten und vorteilhafte Weiterbildungen der Erfindung ergeben sich aus dem im folgenden beschriebenen und in der Zeichnung dargestellten, in keiner Weise als Einschränkung der Erfindung zu verstehenden Ausführungsbeispiel, sowie aus den übrigen Unteransprüchen. Es zeigt:Further details and advantageous developments of the invention result from the exemplary embodiment described below and illustrated in the drawing, which is in no way to be understood as a limitation of the invention, and from the remaining subclaims. It shows:
Fig. 1 eine raumbildliche Darstellung einer bevorzugten Ausführungsform eines erfindungsgemäßen Lüfters vor der Fertigmontage,1 is a spatial representation of a preferred embodiment of a fan according to the invention before final assembly,
Fig. 2 eine Explosionsdarstellung des Lüfters der Fig. 1 ,2 is an exploded view of the fan of FIG. 1,
Fig. 3 eine Draufsicht auf die Luftaustrittsseite des Lüfters der Fig. 1 ,3 is a plan view of the air outlet side of the fan of FIG. 1,
Fig. 4 einen Schnitt, gesehen längs der Linie IV-IV der Fig. 3,4 shows a section, seen along the line IV-IV of FIG. 3,
Fig. 5 eine Seitenansicht eines verrastbaren Halteglieds 80, gesehen in Richtung des Pfeiles V der Fig. 7,5 is a side view of a latchable holding member 80, seen in the direction of arrow V of FIG. 7,
Fig. 6 einen Schnitt, gesehen längs der Linie Vl-Vl der Fig. 3,6 shows a section, seen along the line VI-VI of FIG. 3,
Fig. 7 eine Draufsicht, gesehen in Richtung des Pfeiles VII der Fig. 5,7 is a plan view, seen in the direction of arrow VII of FIG. 5,
Fig. 8 eine Schemadarstellung des Halteglieds 80 der Fig. 5 im montierten Zustand,8 is a schematic representation of the holding member 80 of FIG. 5 in the assembled state,
Fig. 9 einen Schnitt, gesehen längs der Linie IX-IX der Fig. 11 , Fig. 10 eine Draufsicht auf ein Eck des Lüfters, in welchem ein Halteglied 80 montiert ist,9 is a sectional view taken along the line IX-IX of FIG. 11, 10 is a plan view of a corner of the fan, in which a holding member 80 is mounted,
Fig. 11 einen Schnitt, gesehen längs der Linie Xl-Xl der Fig. 10, also analog Fig. 4, aber bei montiertem Halteglied und montierter flexibler Leitung 52, und11 shows a section, seen along the line Xl-Xl of FIG. 10, that is to say analogously to FIG. 4, but with the holding element and the flexible line 52, and
Fig. 12 bis 15 raumbildliche Darstellungen des Halteglieds 80, gesehen aus verschiedenen Richtungen.12 to 15 representations in space of the holding member 80, seen from different directions.
Fig. 1 zeigt in raumbildlicher Darstellung einen sogenannten Gerätelüfter 20. Dieser ist hier beispielhaft als Diagonallüfter dargestellt, was für manche Anwendungen Vorteile hat, weil sich eine günstigere Lüfterkennlinie ergibt, d.h. wenn z.B. ein Filter verstopft ist und deshalb die Durchflussmenge dV/dt (Flow Rate) des Lüfters 20 sinkt, steigt bei einem Diagonallüfter der erzeugte Druck Δpf (Static Pressure) stärker an als bei einem Axiallüfter, was eine Sicherheitsreserve für den Benutzer darstellt, besonders dann, wenn ein hoher Druck bei großer Luftmenge gefordert wird.Fig. 1 shows a spatial representation of a so-called device fan 20. This is shown here as an example as a diagonal fan, which has advantages for some applications because it results in a more favorable fan characteristic, i.e. if e.g. a filter is clogged and therefore the flow rate dV / dt (flow rate) of the fan 20 drops, the pressure Δpf (static pressure) generated in a diagonal fan rises more than in the case of an axial fan, which represents a safety reserve for the user, especially if when a high pressure is required with a large amount of air.
Fig. 2 zeigt den Aufbau des Lüfters 20 in einer Explosionsdarstellung. Dieser hat ein Lüftergehäuse 22, welches etwa die Form eines kegelstumpfförmigen Rohres 24 hat, an dessen beiden Enden Befestigungsflansche 26, 28 vorgesehen sind. Die Durchströmrichtung der Luft ist in Fig. 1 bei 30 dargestellt. Die Einströmseite des Lüfters 20 ist mit 32, die Ausströmseite mit 34 bezeichnet.2 shows the structure of the fan 20 in an exploded view. This has a fan housing 22, which has approximately the shape of a frustoconical tube 24, on the two ends of which fastening flanges 26, 28 are provided. The direction of flow of the air is shown at 30 in FIG. 1. The inflow side of the fan 20 is designated 32, the outflow side 34.
Der Lüfter 20 hat einen Motor 36, dessen Stator in den Fig. 1 bis 3 mit gestrichelten Linien angedeutet ist und der ein Lüfterrad 38 mit Lüfterflügeln 40 antreibt. Der Motor 36 ist bevorzugt ein elektronisch kommutierter zweiphasiger Außenläufermotor, bei dem das Lüfterrad 38 direkt auf dem Außenrotor angebracht ist.The fan 20 has a motor 36, the stator of which is indicated by dashed lines in FIGS. 1 to 3 and which drives a fan wheel 38 with fan blades 40. The motor 36 is preferably an electronically commutated two-phase external rotor motor, in which the fan wheel 38 is attached directly to the external rotor.
Die Form der Lüfterflügel 40 ist an die konische Form der Innenseite des Rohres 24 angepasst. Das Lüfterrad 38 ist auf seiner Außenseite 39 kegelstumpfförmig ausgebildet, wie in Fig. 2 angedeutet und bildet zusammen mit dem kegelstumpfförmigen Rohr 24 eine Luftdurchtrittsoffnung 41. Diese hat auf der Lufteintrittsseite 32 einen kleineren Durchmesser als auf der Luftaustrittsseite 34. Ebenso hat das Lüfterrad 38 auf der Lufteintrittsseite 32 einen kleineren Durchmesser, der in Richtung zur Luftaustrittsseite 34 zunimmt.The shape of the fan blades 40 is adapted to the conical shape of the inside of the tube 24. The fan wheel 38 is frustoconical on its outer side 39, as indicated in FIG. 2, and forms together with the frustoconical tube 24 has an air passage opening 41. This has a smaller diameter on the air inlet side 32 than on the air outlet side 34. Likewise, the fan wheel 38 on the air inlet side 32 has a smaller diameter, which increases in the direction of the air outlet side 34.
Zur Montage des Motors 36 dient ein im folgenden auch als Nabe bezeichneter Befestigungsflansch 44, der über dünne Haltestege 46 mit dem Lüftergehäuse 22 verbunden wird. Dies geschieht bevorzugt durch Schraubverbindungen, welche in Fig. 1 bis 3 bei 48 angedeutet sind. Hierzu haben die Stege 46 an ihren Enden Verbreiterungen 21 , die in entsprechende Ausnehmungen 23 des Lüftergehäuses 22 passen, vgl. die Fig. 1 bis 3. Zwei diametral gegenüber liegende Ausnehmungen 23 haben jeweils einen Zentrierstift 25, der formschlüssig in eine entsprechende Ausnehmung 27 der zugeordneten Verbreiterung 21 passt und so die Nabe 44 exakt im konischen Rohr 24 zentriert. Die Schrauben 48 dienen also nur zur Befestigung, aber nicht zur Zentrierung. Dies ist eine sehr vorteilhafte Art der Befestigung, auch im Hinblick auf eine Automatisierung der Fertigung.A mounting flange 44, also referred to below as a hub, is used to mount the motor 36 and is connected to the fan housing 22 via thin retaining webs 46. This is preferably done by screw connections, which are indicated in Fig. 1 to 3 at 48. For this purpose, the webs 46 have widenings 21 at their ends, which fit into corresponding recesses 23 in the fan housing 22, cf. 1 to 3. Two diametrically opposite recesses 23 each have a centering pin 25 which fits in a form-fitting manner in a corresponding recess 27 of the associated widening 21 and thus centers the hub 44 exactly in the conical tube 24. The screws 48 are used only for attachment, but not for centering. This is a very advantageous type of fastening, also with a view to automating production.
Ferner ist an der Nabe 44 ein verkürzter Steg 50 vorgesehen, dessen Funktion es ist, eine flexible elektrische Anschlussleitung 52 des Motors 36 abzustützen, die z.B. als mehradrige Mantelleitung ausgebildet sein kann. Wie Fig. 2 klar zeigt, kommt die flexible Leitung 52 durch eine seitliche Öffnung 49 der Nabe 44 vom Motor 36, wo sie z.B. an einer - nicht dargestellten - Leiterplatte angelötet ist, wird dann in eine am Steg 50 vorgesehene Führungsrinne 53 eingelegt, und dann weiter nach außen zum Lüftergehäuse 22 geführt, wo eine sogenannte Zugentlastung für die Leitung 52 vorgesehen ist, welche nachfolgend beschrieben wird.Furthermore, a shortened web 50 is provided on the hub 44, the function of which is to support a flexible electrical connecting line 52 of the motor 36, which e.g. can be designed as a multi-core sheathed cable. As FIG. 2 clearly shows, the flexible line 52 comes from the motor 36 through a lateral opening 49 of the hub 44, where it e.g. is soldered to a circuit board (not shown), is then inserted into a guide groove 53 provided on the web 50, and is then guided further out to the fan housing 22, where a so-called strain relief for the line 52 is provided, which will be described below.
Der Motor 36 ist über nicht dargestellte Haltekrallen mit der Nabe 44 fest verbunden, und die Stege 46, 50 sind bevorzugt einstückig mit der Nabe 44 ausgebildet. In Fig. 1 ist die Drehrichtung des dargestellten Lüfters 20 bei 56 angedeutet.The motor 36 is fixedly connected to the hub 44 via retaining claws, not shown, and the webs 46, 50 are preferably formed in one piece with the hub 44. In Fig. 1, the direction of rotation of the fan 20 shown at 56 is indicated.
Die Anschlussleitung 52 des Lüfters 20 enthält gewöhnlich mehrere flexible isolierte Leitungen, bevorzugt sogenannte Litzen bezeichnet, von denen jede aus einer Mehrzahl dünner Drähten zusammengesetzt ist, die von einem isolierenden Material umhüllt sind. Im Haushalt werden derartige flexible Leitungen oder "Litzen" z.B. in Form von mehradrigen Mantelleitungen zum elektrischen Anschluss von Bügeleisen oder Fernsehern verwendet. Ein Lüfter 20 benötigt zwei Leitungen zum Zuführen einer Betriebsspannung. Vielfach sind weitere Leitungen vorgesehen, z.B. für ein Tachosignal oder ein Alarmsignal. Alle diese biegsamen Leitungen müssen bei der Montage des Lüfters 20 schnell und vor allem sicher befestigt werden, wie das nachfolgend beschrieben wird.The connection line 52 of the fan 20 usually contains a plurality of flexible insulated lines, preferably referred to as so-called strands, each of which is composed of a plurality of thin wires, which are covered by an insulating material. In the household, such flexible lines or "strands" are used, for example, in the form of multi-core sheathed cables for the electrical connection of irons or televisions. A fan 20 requires two lines for supplying an operating voltage. Other lines are often provided, for example for a speedometer signal or an alarm signal. All of these flexible lines must be fast and, above all, securely attached when installing the fan 20, as will be described below.
Wie Fig. 1 zeigt, hat das Lüftergehäuse 22, gesehen in Richtung der mit 60 (Fig. 2) bezeichneten Drehachse des Motors 36, einen etwa rechteckförmigen und insbesondere quadratischen Umriss mit vier Ecken, an denen Bohrungen 62 zur Befestigung des Lüfters 20 vorgesehen sind. An dem Eck 64, das in Fig. 1 bis 3 vorne rechts dargestellt ist, befindet sich eine Ausnehmung 66. Hierzu ist das Rohr 24 auf seiner Außenseite mit einer flachen Verbreiterung 68 versehen, welche bevorzugt etwa parallel zur Drehachse 60 und quer zum Eck 64 verläuft. Mindestens einer der Flansche 26, 28 hat im Anschluss an diese Verbreiterung 68 eine Ausnehmung, die beim Flansch 28 mit 28A und beim Flansch 26 mit 26A bezeichnet ist. Bevorzugt fluchten die Ausnehmungen 26A, 28A miteinander im wesentlichen, so dass man die flexible Leitung 52 in axialer Richtung, also etwa parallel zur Drehachse 60, durch sie hindurchlegen kann, vgl. Fig. 1. Im Bereich des Ecks 64 sind die Flansche 26, 28 durch ein Verbindungsglied 69 miteinander verbunden, dessen Form und Lage aus den Fig. 1 bis 3 klar hervorgeht. Seine Funktion im Rahmen der Montage der flexiblen Leitung 52 wird nachfolgend beschrieben.As shown in FIG. 1, the fan housing 22, viewed in the direction of the axis of rotation of the motor 36 designated by 60 (FIG. 2), has an approximately rectangular and in particular square outline with four corners, on which holes 62 are provided for fastening the fan 20 , At the corner 64, which is shown at the front right in FIGS. 1 to 3, there is a recess 66. For this purpose, the tube 24 is provided on its outside with a flat widening 68, which is preferably approximately parallel to the axis of rotation 60 and transverse to the corner 64 runs. At least one of the flanges 26, 28 has, following this widening 68, a recess which is designated 28A for the flange 28 and 26A for the flange 26. The recesses 26A, 28A are preferably substantially aligned with one another so that the flexible line 52 can be passed through it in the axial direction, that is to say approximately parallel to the axis of rotation 60, cf. Fig. 1. In the area of the corner 64, the flanges 26, 28 are connected to one another by a connecting member 69, the shape and position of which can be clearly seen from FIGS. 1 to 3. Its function in the assembly of the flexible line 52 is described below.
Auf der Ausströmseite 34 des kegelstumpfförmigen Rohres 24 ist eine seitliche Aussparung 70 vorgesehen, die etwa in Verlängerung des verkürzten Steges 50 liegt, so dass die flexible Leitung 52, die in der Rinne 53 des Steges 50 geführt wird, anschließend durch die Aussparung 70 und durch die Ausnehmungen 28A und 26A gelegt werden kann, ohne dass sie irgendwo eingefädelt werden müsste. Diese Art der Führung der Leitung 52 geht aus Fig. 1 bis 3 klar hervor. Dabei verläuft die Leitung 52 etwa parallel zur flachen Verbreiterung 68. Dies stellt einen Zwischenschritt bei der Montage dar, wie sich aus dem nachfolgenden Text ergibt. Fig. 3 zeigt eine Draufsicht auf die Ausströmseite des Lüfters 20. Man erkennt sehr gut die fünf Lüfterflügel 40 und ihre für einen Diagonallüfter charakteristische Form. Die konkaven Enden 72 der Flügel 40 befinden sich auf der Saugseite 32. Ferner erkennt man klar die Form der drei Stege 46, sowie deren Verbindungen 48 mit dem Lüftergehäuse 22. Ebenso erkennt man die Form des verkürzten Stegs 50 und der an ihm vorgesehenen Rinne 53, in welche die mindestens eine flexible Leitung 52 in der dargestellten Weise eingelegt wird. Diese Rinne 53 erstreckt sich nur über einen Teil des Luftdurchtrittsquerschnitts 41 , z.B. wie dargestellt über ein Drittel seiner radialen Erstreckung. Ferner erkennt man, dass die flache Verbreiterung 68 an ihrem in Fig. 3 rechten Ende in einen Vorsprung 74 übergeht, an dem eine Verrastung möglich ist. An ihrem linken Ende geht sie in einen analogen Vorsprung 76 über, dessen Funktion nachfolgend erläutert wird.On the outflow side 34 of the frustoconical tube 24, a lateral recess 70 is provided, which is approximately in the extension of the shortened web 50, so that the flexible line 52, which is guided in the groove 53 of the web 50, then through the recess 70 and through the recesses 28A and 26A can be placed without having to be threaded anywhere. This type of routing of the line 52 is clear from FIGS. 1 to 3. The line 52 runs approximately parallel to the flat widening 68. This represents an intermediate step in the assembly, as can be seen from the text below. FIG. 3 shows a plan view of the outflow side of the fan 20. The five fan blades 40 and their shape which is characteristic of a diagonal fan can be seen very well. The concave ends 72 of the blades 40 are located on the suction side 32. Furthermore, the shape of the three webs 46 and their connections 48 to the fan housing 22 can be clearly seen. The shape of the shortened web 50 and the channel 53 provided on it can also be seen , in which the at least one flexible line 52 is inserted in the manner shown. This channel 53 extends only over part of the air passage cross-section 41, for example over a third of its radial extent as shown. It can also be seen that the flat widening 68 merges into a projection 74 at its right end in FIG. 3, on which a latching is possible. At its left end, it merges into an analog projection 76, the function of which is explained below.
Wie dargestellt, erstreckt sich die flexible Leitung 52 vom Motor 36 über die Rinne 53 und durch die Aussparung 70 des kegelstumpfförmigen Rohres 24 zu den beiden Aussparungen 28A und 26A der Flansche 28 bzw. 26. Dies geht in gleicher Weise aus Fig. 4 hervor, welche einen Schnitt durch den angegebenen Teil der Fig. 3 darstellt.As shown, the flexible line 52 extends from the motor 36 over the trough 53 and through the recess 70 of the frusto-conical tube 24 to the two recesses 28A and 26A of the flanges 28 and 26, respectively. This can be seen in the same way from FIG. 4, which represents a section through the specified part of FIG. 3.
Fig. 5 zeigt ein Halteglied 80, gesehen in Richtung des Pfeiles V der Fig. 7, also in Seitenansicht. Fig. 6 zeigt einen Schnitt, gesehen längs der Linie Vl-Vl der Fig. 5, und Fig. 7 zeigt eine Draufsicht auf das Halteglied 80, gesehen in Richtung des Pfeiles VII der Fig. 5. Die Fig. 12 bis 15 zeigen das Halteglied 80 in verschiedenen perspektivischen Darstellungen, um das Verständnis seiner Form zu erleichtern.FIG. 5 shows a holding member 80, seen in the direction of arrow V of FIG. 7, that is to say in a side view. Fig. 6 shows a section, seen along the line VI-VI of Fig. 5, and Fig. 7 shows a plan view of the holding member 80, viewed in the direction of arrow VII of Fig. 5. Figs. 12 to 15 show this Holding member 80 in various perspective views to facilitate understanding of its shape.
Das Halteglied 80 hat ein im wesentlichen flaches Basisteil 82, das in Fig. 6 und Fig. 7 in der Draufsicht dargestellt ist und das dazu dient, das Halteglied 80 im Eck 64 des Lüfters 20 in der dortigen Ausnehmung 66 zu verrasten. Dazu ist es auf der Unterseite links mit einem Haken 84 versehen, der gemäß Fig. 8 im montierten Zustand den Vorsprung 76 des Lüftergehäuses 22 hintergreift. Rechts hat das Halteglied 80 einen lösbaren, federnden Rasthaken 86, der gemäß Fig. 8 am Vorsprung 74 des Lüftergehäuses 22 verrastbar ist. In Fig. 9 wird also das Halteglied 80 von links in die Ausnehmung 66 so weit eingeschoben, bis es in der in Fig. 8 und 9 dargestellten Weise an den Vorsprüngen 74, 76 festgehalten wird.The holding member 80 has a substantially flat base part 82, which is shown in plan view in FIGS. 6 and 7 and which serves to latch the holding member 80 in the corner 64 of the fan 20 in the recess 66 there. For this purpose, it is provided on the bottom left with a hook 84 which, according to FIG. 8, engages behind the projection 76 of the fan housing 22 in the assembled state. On the right, the holding member 80 has a releasable, resilient latching hook 86 which, according to FIG. 8, can be latched onto the projection 74 of the fan housing 22. 9 is That is, the holding member 80 is pushed into the recess 66 from the left until it is held on the projections 74, 76 in the manner shown in FIGS. 8 and 9.
In Fig. 5 befindet sich oberhalb des Basisteils 82 ein Dachteil 90, das an seinem in Fig. 5 linken Endbereich über eine Schräge 92 mit dem Basisteil 82 verbunden ist. Das Dachteil 90 ist an seinen in Fig. 6 und 7 oberen Bereichen breiter als das Basisteil 82 und bildet dort eine Begrenzungswand 94, die senkrecht zum Basisteil 82 verläuft und deren Form und Lage aus Fig. 5 und 6 klar hervorgeht.In FIG. 5 there is a roof part 90 above the base part 82, which is connected to the base part 82 at its end region on the left in FIG. 5 via a slope 92. The roof part 90 is wider at its upper regions in FIGS. 6 and 7 than the base part 82 and forms a boundary wall 94 there, which runs perpendicular to the base part 82 and whose shape and position can be clearly seen from FIGS. 5 and 6.
Das Dachteil 90 ist auch an einer Stelle, die etwa in seiner Mitte liegt, über ein Umlenkglied 96 mit dem Basisteil 82 verbunden. Wie die Fig. 8 bis 11 zeigen, dient das Umlenkglied 96 dazu, die flexible Leitung 52 um einen bestimmten Mindestwinkel umzulenken, nachdem das Halteglied 80 in das Lüftergehäuse 22 eingeschoben worden ist.The roof part 90 is also connected to the base part 82 via a deflection member 96 at a point approximately in the middle thereof. As shown in FIGS. 8 to 11, the deflecting member 96 serves to deflect the flexible line 52 by a certain minimum angle after the holding member 80 has been inserted into the fan housing 22.
Rechts vom Umlenkglied 96 hat das Dachteil 90 einen erhöhten Abschnitt 98, der gemäß Fig. 8, 9 im montierten Zustand mit Vorspannung gegen das Teil 69 anliegt, was verhindert, dass das Halteglied 80 bei Zug ausrastet, indem es sich von der Stelle 74 löst. Ein Ausrasten ist aber möglich, indem man in Fig. 8 oder 9 das Halteglied 80 mit einer Hand nach rechts schiebt und dann den federnden Rasthaken 86 mit der anderen Hand nach oben biegt und dann das Halteglied 80 von Hand nach links aus der Ausnehmung 66 heraus schiebt oder zieht. Das Halteglied 80 wird bevorzugt aus einem federnden Kunststoff hergestellt.To the right of the deflection member 96, the roof part 90 has a raised section 98 which, according to FIGS. 8, 9, bears against the part 69 with a prestress in the assembled state, which prevents the holding member 80 from disengaging when pulled by detaching from the position 74 , Disengaging is possible, however, by pushing the holding member 80 with one hand to the right in FIG. 8 or 9 and then bending the resilient latching hook 86 upward with the other hand and then pulling the holding member 80 out of the recess 66 by hand to the left pushes or pulls. The holding member 80 is preferably made of a resilient plastic.
Wie man Fig. 7 entnimmt, überdeckt dort im unteren Abschnitt das Dachteil 90 nur einen Teil des Basisteils 82. Durch den frei gelassenen Bereich 99 kann die flexible Leitung 52 geleitet werden. Falls das nicht erwünscht ist, kann der Bereich 99 auch komplett vom Dachteil 90 überdeckt werden.As can be seen in FIG. 7, the roof part 90 covers only a part of the base part 82 in the lower section. The flexible line 52 can be guided through the area 99 left free. If this is not desired, the area 99 can also be completely covered by the roof part 90.
Fig. 9 zeigt das Halteglied 80 im montierten Zustand in der Ausnehmung 66 im Eck 64 des Lüftergehäuses 22. Das Halteglied 80 ist in dieser Stellung nach seiner Montage verrastet, kann aber durch Anheben des federnden Rastglieds 86 entrastet und nach links aus der Ausnehmung 66 herausgezogen werden. Fig. 10 zeigt dasselbe Eck 64 des Lüftergehäuses 22, aber in Draufsicht, also nicht in Schnittdarstellung. Man erkennt die flexible Leitung 52, die über das Stützglied 50 zur Ausnehmung 70 geführt ist. Die seitliche Aussparung 28A des Lüftergehäuses 22 ist durch den Abschnitt 94 des Halteglieds 80 weitgehend verschlossen, so dass für die flexible Leitung 52 dort eine Führungsöffnung gebildet wird, wie das auch Fig. 11 deutlich zeigt.Fig. 9 shows the holding member 80 in the assembled state in the recess 66 in the corner 64 of the fan housing 22. The holding member 80 is locked in this position after its assembly, but can be unlocked by lifting the resilient locking member 86 and pulled out of the recess 66 to the left become. 10 shows the same corner 64 of the fan housing 22, but in a top view, that is to say not in a sectional view. One recognizes the flexible line 52, which is led to the recess 70 via the support member 50. The lateral recess 28A of the fan housing 22 is largely closed by the section 94 of the holding member 80, so that a guide opening is formed there for the flexible line 52, as is also clearly shown in FIG. 11.
Durch das Umlenkglied 96 wird beim Einschieben des Halteglieds 80 die flexible Leitung 52 in Fig. 11 nach rechts gedrückt, so dass sie einmal an einer ersten Umlenkstelle 106 dort umgelenkt wird, wo sie die Ausnehmung 70 verlässt. Zum anderen wird die flexible Leitung 52 durch das Umlenkglied 96 an einer zweiten Umlenkstelle 108 um einen Winkel umgelenkt, der je nach Anwendung zwischen etwa 60 und 110° liegen kann. Wird die flexible Leitung 52 in einer Richtung 52A aus dem Lüfter 20 herausgeführt, so beträgt der Umlenkwinkel an der zweiten Umlenkstelle 108 etwa 60°, und wird die flexible Leitung 52 in einer Richtung 52B aus dem Lüfter 20 herausgeführt, nämlich durch die Ausnehmung 26A, so ist der Umlenkwinkel an der Stelle 108 größer als 90°. Schließlich kann die flexible Leitung 52 auch in einer Richtung herausgeführt werden, die in Fig. 9 mit 52C bezeichnet ist, wobei sie gegen das Teil 69 des Lüftergehäuses 22 anliegt. Dabei verläuft dann die Leitung 52 durch den freien Raum 99, der in Fig. 7 dargestellt ist. Soll diese Möglichkeit ausgeschlossen werden, so wird der freie Raum 99 vom Dachteil 90 voll überdeckt, indem dieses Dachteil 90 entsprechend breiter ausgebildet wird.The flexible line 52 is pushed to the right in FIG. 11 by the deflecting member 96 when the holding member 80 is pushed in, so that it is deflected once at a first deflecting point 106 where it leaves the recess 70. On the other hand, the flexible line 52 is deflected by the deflecting member 96 at a second deflecting point 108 by an angle which, depending on the application, can be between approximately 60 and 110 °. If the flexible line 52 is led out of the fan 20 in one direction 52A, the deflection angle at the second deflection point 108 is approximately 60 °, and the flexible line 52 is led out of the fan 20 in a direction 52B, namely through the recess 26A, the deflection angle at point 108 is greater than 90 °. Finally, the flexible line 52 can also be led out in a direction which is denoted by 52C in FIG. 9, wherein it bears against the part 69 of the fan housing 22. The line 52 then runs through the free space 99 shown in FIG. 7. If this possibility is to be excluded, the free space 99 is completely covered by the roof part 90 by making this roof part 90 correspondingly wider.
Durch die beiden Umlenkstellen 106, 108 der Fig. 11 findet auf jeden Fall die erforderliche Zugentlastung auf derjenigen Seite der flexiblen Leitung 52 statt, die zum Motor 36 führt. Die Montage ist dabei denkbar einfach, d.h. die flexible Leitung 52 wird einfach so in den Lüfter 20 eingelegt, wie das in Fig. 1 dargestellt ist, und dann wird das Halteglied 80 in die Ausnehmung 66 eingeschoben und dort verrastet. Dabei entstehen automatisch die beiden Umlenkstellen 106, 108 (Fig. 11), wodurch die Zugentlastung hergestellt ist. Eine solche Montage ist also unabhängig davon möglich, ob an der Leitung 52 ein Stecker befestigt ist oder nicht. Als Alternative kann auch ein Stecker direkt im oder am Halteglied 80 befestigt werden, oder das Halteglied 80 kann selbst als Stecker ausgebildet sein, und dieser Stecker kann in die Ausnehmung 66 eingeschoben und dort verrastet werden.Due to the two deflection points 106, 108 of FIG. 11, the necessary strain relief takes place on that side of the flexible line 52 that leads to the motor 36. The assembly is very simple, ie the flexible line 52 is simply inserted into the fan 20 as shown in FIG. 1, and then the holding member 80 is inserted into the recess 66 and locked there. The two deflection points 106, 108 (FIG. 11) are created automatically, as a result of which the strain relief is produced. Such assembly is possible regardless of whether a connector is attached to line 52 or not. As an alternative, a plug can also be fastened directly in or on the holding member 80, or the holding member 80 itself can be used as Plug be formed, and this plug can be inserted into the recess 66 and locked there.
Vorteile ergeben sich bei der Erfindung vor allem durch folgende Merkmale:Advantages of the invention result primarily from the following features:
• Vor der Montage des Halteglieds 80 kann mindestens eine flexible Leitung 52 direkt in entsprechende Öffnungen des Lüfters 20 eingelegt werden, d.h. sie muss nicht eingefädelt werden, und sie wird erst während der Montage des Halteglieds 80 an den Stellen 106, 108 umgelenkt.Before assembly of the holding member 80, at least one flexible line 52 can be inserted directly into corresponding openings in the fan 20, i.e. it does not have to be threaded, and it is only deflected at the points 106, 108 during the mounting of the holding member 80.
• Nach der Montage kann die flexible Leitung 52, sofern an ihr kein Stecker befestigt ist, nur noch entweder durch Ausfädeln über ihre ganze freie Länge oder durch Demontieren des Halteglieds 80 aus der Zugentlastung entfernt werden.• After assembly, the flexible line 52, if no plug is attached to it, can only be removed from the strain relief either by unthreading its entire free length or by disassembling the holding member 80.
• Eine flexible Leitung 52, an der ein Stecker befestigt ist, kann nur noch durch Entriegeln des Halteglieds 80 wieder aus der Zugentlastung entfernt werden.• A flexible line 52, to which a plug is attached, can only be removed from the strain relief by unlocking the holding member 80.
• Durch das Einschieben und Verrasten des Halteglieds 80 wird die mindestens eine flexible Leitung 52 gleichzeitig an zwei Stellen 106, 108 (Fig. 11 ) umgelenkt, so dass man in der Endstellung des Halteglieds 80 automatisch die für eine Zugentlastung notwendige Zahl und Art von Umlenkungen erreicht.By inserting and latching the holding member 80, the at least one flexible line 52 is deflected simultaneously at two points 106, 108 (FIG. 11), so that in the end position of the holding member 80 the number and type of deflections necessary for strain relief are automatically obtained reached.
• Sofern mehrere flexible Leitungen 52 verwendet werden, ergibt sich eine wesentliche Arbeitsvereinfachung durch die beiden Aussparungen 26A, 28A, in welche diese Leitungen vor der Montage analog Fig. 1 eingelegt werden können. Wenn die Leitungen 52 eingelegt sind, kann anschließend das Halteglied 80 eingeschoben und verrastet werden. Jedoch kann die Erfindung z.B. auch ohne die Aussparung 26A realisiert werden, weil man auch in diesem Fall die Zugentlastung durch Umlenkung erhält.If several flexible lines 52 are used, there is a substantial simplification of work through the two cutouts 26A, 28A, into which these lines can be inserted analogously to FIG. 1 before assembly. When the lines 52 are inserted, the holding member 80 can then be inserted and locked. However, the invention can e.g. can also be implemented without the recess 26A, because in this case too the strain relief is obtained by deflection.
• Die Montagezeit ist unabhängig von der Länge der flexiblen Leitung(en) 52.• The assembly time is independent of the length of the flexible line (s) 52.
• Auch flexible Leitungen 52, an deren freiem Ende ein Stecker befestigt ist, können problemlos auf diese Weise montiert werden.• Even flexible lines 52, at the free end of which a plug is attached, can be easily installed in this way.
• Durch den am Gehäuse 22 vorgesehenen Steg 69 ist ein Herausfädeln der flexiblen Leitung 52 im verrrasteten Zustand des Halteglieds 80 nicht oder nur sehr schwer möglich.• Due to the web 69 provided on the housing 22, it is not possible or only very difficult to thread the flexible line 52 out when the holding member 80 is locked.
• Ein Einfädeln der flexiblen Leitung 52 in feststehende Umlenkungen am Gehäuse entfällt durch die Erfindung, wodurch sich die Montagezeit entsprechend verkürzt.Threading the flexible line 52 into fixed deflections on the housing is eliminated by the invention, which shortens the assembly time accordingly.
• Anstelle der dargestellten einzelnen flexiblen Leitung 52 funktioniert die Erfindung in gleicher Weise auch bei Verwendung mehrerer flexiblen Leitungen oder solcher Leitungen, die in einen Isolierschlauch eingelegt sind und bei denen eine Zugentlastung notwendig ist.Instead of the single flexible line 52 shown, the invention works in the same way also when using several flexible lines or such lines that are inserted in an insulating tube and for which a strain relief is necessary.
• Anstelle des Halteglieds 80 kann ggf. auch ein Steckeranschluss eingesetzt werden.• Instead of the holding member 80, a plug connection can also be used if necessary.
• Sofern eine Zugkraft auf die flexible Leitung 52 aufgebracht wird, die senkrecht zur Einschieberichtung verläuft, wird diese nicht vom Halteglied 80, sondern vom Teil 69 des Gehäuses 22 aufgenommen, vgl. die Linie 52C in Fig. 9.If a tensile force is applied to the flexible line 52, which is perpendicular to the direction of insertion, this is not absorbed by the holding member 80, but by the part 69 of the housing 22, cf. line 52C in FIG. 9.
• Durch das Teil 69 werden im Bereich des Ecks 64 die beiden Flanschteile 26 und 28 relativ zueinander stabilisiert. Dies ist bei der Befestigung des Lüfters 20 über seine Flansche 26, 28 von Vorteil, z.B. bei einer Durchsteckverschraubung. Im Bereich der anderen Ecken können analoge Verstärkungen vorgesehen werden, wie das Fig. 1 klar zeigt.• The part 69 stabilizes the two flange parts 26 and 28 relative to one another in the area of the corner 64. This is advantageous when fastening the fan 20 via its flanges 26, 28, e.g. with a push-through fitting. Analog reinforcements can be provided in the area of the other corners, as clearly shown in FIG. 1.
Die Erfindung ist besonders vorteilhaft in Kombination mit einem Diagonallüfter, kann aber auch bei Axiallüftern mit Vorteil verwendet werden. Naturgemäß sind im Rahmen der Erfindung vielfache Variationen möglich. So könnte man z.B. den verkürzten Steg 50 auch so lang ausbilden, dass man ihn am Eck 64 des Lüftergehäuses 22 befestigen kann, wozu er eine etwas andere Form haben müsste als die Stege 46. Auch kann die Erfindung in gleicher Weise dort verwendet werden, wo zum Anschluss eines Lüfters Leitungen verwendet werden, die relativ starr, aber doch biegsam sind, also keine Litzen. Solche und andere Modifikationen liegen im Rahmen der Erfindung. The invention is particularly advantageous in combination with a diagonal fan, but can also be used with advantage in the case of axial fans. Naturally, multiple variations are possible within the scope of the invention. So you could e.g. form the shortened web 50 so long that it can be fastened to the corner 64 of the fan housing 22, for which purpose it would have to have a somewhat different shape than the webs 46. The invention can also be used in the same way where a fan is connected Cables are used that are relatively rigid, but flexible, so no strands. Such and other modifications are within the scope of the invention.

Claims

Patentansprüche claims
1. Lüfter, insbesondere Gerätelüfter (20), welcher aufweist: Eine Nabe (44); ein mit der Nabe (44) verbundenes Lüftergehäuse (22), welches eine im1. A fan, in particular a device fan (20), which has: a hub (44); a with the hub (44) connected to the fan housing (22), which in a
Lüfter vorgesehene Luftdurchtrittsoffnung (41) nach außen hin begrenzt und an mindestens einer Stelle seines Umfangs eine radiale Erweiterung (64) aufweist; ein Lüfterrad (38), welches in der Luftdurchtrittsoffnung (41) drehbar angeordnet ist; einen an der Nabe (44) angeordneten Motor (36) zum Antrieb des LüfterradsAir passage opening (41) provided for the fan is limited to the outside and has a radial extension (64) at at least one point on its circumference; a fan wheel (38) which is rotatably arranged in the air passage opening (41); a motor (36) arranged on the hub (44) for driving the fan wheel
(38); eine elektrische Verbindung, welche vom Motor (36) zum Lüftergehäuse(38); an electrical connection from the motor (36) to the fan housing
(22) führt und mindestens eine elektrische Leitung (52) aufweist; eine in der radialen Erweiterung (64) des Lüftergehäuses (22) vorgesehene(22) leads and has at least one electrical line (52); one provided in the radial extension (64) of the fan housing (22)
Ausnehmung (66), welche sich etwa tangential zum dortigen Verlauf desRecess (66), which is approximately tangential to the course of the
Lüftergehäuses (22) erstreckt und zu welcher die elektrische Leitung (52) geführt ist; und ein in diese Ausnehmung (66) einführbares und dort verrastbaresFan housing (22) extends and to which the electrical line (52) is guided; and an insertable into this recess (66) and lockable there
Halteglied (80), welches im verrasteten Zustand die elektrische Leitung (52) an wenigstens einer Stelle (106, 108) um einen vorgegebenenHolding member (80), which in the locked state, the electrical line (52) at at least one point (106, 108) by a predetermined
Mindestwinkel umlenkt und dadurch auf der zum Motor (36) führenden Seite der elektrischen Leitung (52) eine Zugentlastung bewirkt.Deflects the minimum angle and thereby causes strain relief on the side of the electrical line (52) leading to the motor (36).
2. Lüfter nach Anspruch 1 , bei welchem das Halteglied (80) im verrasteten Zustand zur Zugentlastung die elektrische Leitung (52) an zwei Stellen (106, 108) umlenkt, wobei diese Leitung bevorzugt als flexible Leitung (52) ausgebildet ist.2. Fan according to claim 1, wherein the holding member (80) in the locked state for strain relief deflects the electrical line (52) at two locations (106, 108), this line preferably being designed as a flexible line (52).
3. Lüfter nach Anspruch 1 oder 2, bei welchem an der Nabe (44) ein Stützglied (50, 53) für die mindestens eine elektrische Leitung (52) vorgesehen ist, welches Stützglied (50, 53) die elektrische Leitung (52) im Bereich der Luftdurchtrittsoffnung (41) mindestens bereichsweise abstützt. 3. Fan according to claim 1 or 2, in which a support member (50, 53) for the at least one electrical line (52) is provided on the hub (44), which support member (50, 53) the electrical line (52) in Supported area of the air passage opening (41) at least in some areas.
4. Lüfter nach einem der vorhergehenden Ansprüche, bei welchem das Lüftergehäuse (22), in Richtung der Drehachse (60) des Motors (36) gesehen, einen etwa rechteckförmigen und insbesondere quadratischen, Ecken (64) aufweisenden Umriss aufweist, und die radiale Erweiterung (64), in welcher die Ausnehmung (66) vorgesehen ist, in einer dieser Ecken ausgebildet ist.4. Fan according to one of the preceding claims, wherein the fan housing (22), seen in the direction of the axis of rotation (60) of the motor (36), has an approximately rectangular and in particular square, corners (64) having an outline, and the radial extension (64), in which the recess (66) is provided, is formed in one of these corners.
5. Lüfter nach Anspruch 3 oder 4, bei welchem das Stützglied (50, 53) in einem Bereich zwischen der Nabe (44) und dem mit der Ausnehmung (66) vorgesehenen Eck (64) vorgesehen ist.5. Fan according to claim 3 or 4, wherein the support member (50, 53) is provided in a region between the hub (44) and the corner (64) provided with the recess (66).
6. Lüfter nach einem der Ansprüche 3 bis 5, bei welchem das Lüftergehäuse (22) einen rohrartigen Abschnitt (24) zur radial äußeren Abgrenzung der Luftdurchtrittsoffnung (41) aufweist, welcher rohrartige Abschnitt (24) an mindestens einem Ende in einen zur Drehachse (60) des Motors (36) im wesentlichen senkrecht verlaufenden Flansch (26, 28) übergeht, welcher im Bereich der Ausnehmung (66) für die Aufnahme des Halteglieds (80) mit einer Aussparung (26A, 28A) zum Einlegen der mindestens einen elektrischen Leitung (52) versehen ist, welche Aussparung in Verbindung mit dem montierten Halteglied (80) eine Umlenkung einer dort befindlichen elektrischen Leitung (52) bewirkt.6. Fan according to one of claims 3 to 5, wherein the fan housing (22) has a tubular section (24) for radially outer delimitation of the air passage opening (41), which tubular section (24) at least at one end in a to the axis of rotation ( 60) of the motor (36) merges into a substantially vertical flange (26, 28) which, in the region of the recess (66) for receiving the holding member (80) with a recess (26A, 28A) for inserting the at least one electrical line (52) is provided, which recess in connection with the mounted holding member (80) causes a deflection of an electrical line (52) located there.
7. Lüfter nach Anspruch 6, bei welchem die Aussparung (70) einen Endabschnitt des rohrartigen Abschnitts (24) durchdringt.7. The fan of claim 6, wherein the recess (70) penetrates an end portion of the tubular portion (24).
8. Lüfter nach einem der vorhergehenden Ansprüche, bei welchem das Lüftergehäuse (22) einen rohrartigen Abschnitt (24) zur radial äußeren Abgrenzung der Luftdurchtrittsoffnung (41) aufweist, welcher Abschnitt (24) sich zwischen Einströmseite (32) und Ausströmseite (34) des Lüfters (20) erstreckt und auf dem größeren Teil seiner axialen Erstreckung etwa nach Art eines Hohlkegelstumpfes ausgebildet ist, dessen größerer Querschnitt, der Ausströmseite (34) zugewandt ist.8. Fan according to one of the preceding claims, wherein the fan housing (22) has a tubular section (24) for radially outer delimitation of the air passage opening (41), which section (24) between the inflow side (32) and outflow side (34) of the Fan (20) extends and is formed on the larger part of its axial extent approximately in the manner of a hollow truncated cone, the larger cross section of which faces the outflow side (34).
9. Lüfter nach Anspruch 8, bei welchem die Nabe (44) im Bereich der Ausströmseite (34) des Lüftergehäuses (22) befestigt ist. 9. Fan according to claim 8, wherein the hub (44) in the region of the outflow side (34) of the fan housing (22) is attached.
10. Lüfter nach Anspruch 9, bei welchem die Nabe (44) auf ihrer radial äußeren Seite mit sich nach außen erstreckenden Stegen (46, 50) versehen ist, von denen eine Mehrzahl im Bereich ihres freien Endes (21 ) mechanisch mit dem Lüftergehäuse (22) verbunden ist.10. Fan according to claim 9, wherein the hub (44) is provided on its radially outer side with outwardly extending webs (46, 50), of which a plurality in the region of its free end (21) mechanically with the fan housing ( 22) is connected.
11. Lüfter nach Anspruch 10, bei welchem im Bereich der freien Enden (21) an mindestens einem Steg (46) eine formschlüssige Führung (25, 27) vorgesehen ist, welche die Lage des betreffenden Stegs (46) relativ zum Lüftergehäuse (22) definiert.11. Fan according to claim 10, in which in the region of the free ends (21) on at least one web (46) a positive guide (25, 27) is provided, which the position of the web (46) in question relative to the fan housing (22) Are defined.
12. Lüfter nach Anspruch 11 , bei welchem im Bereich der freien Enden (21) von zwei einander etwa diametral gegenüber liegenden Stegen (46) jeweils eine formschlüssige Führung (25, 27) vorgesehen ist.12. Fan according to claim 11, in which in the region of the free ends (21) of two approximately diametrically opposite webs (46) each have a positive guide (25, 27) is provided.
13. Lüfter nach einem der Ansprüche 10 bis 12, bei welchem mindestens einer der Stege (50) mit einem Stützglied (53) versehen ist, welches zur Abstützung der mindestens einen elektrischen Leitung (52) im Bereich der Luftdurchtrittsoffnung (41) ausgebildet ist.13. Fan according to one of claims 10 to 12, wherein at least one of the webs (50) is provided with a support member (53) which is designed to support the at least one electrical line (52) in the region of the air passage opening (41).
14. Lüfter nach einem der vorhergehenden Ansprüche, bei welchem die elektrische Leitung (52) mindestens eine isolierte Litze aufweist.14. Fan according to one of the preceding claims, wherein the electrical line (52) has at least one insulated wire.
15. Lüfter nach einem der vorhergehenden Ansprüche, bei welchem die elektrische Leitung (52) eine Mehrzahl von flexiblen Litzen aufweist.15. Fan according to one of the preceding claims, wherein the electrical line (52) has a plurality of flexible strands.
16. Lüfter nach Anspruch 15, bei welchem die flexiblen Litzen in einem Isolierschlauch zusammen gefasst sind.16. Fan according to claim 15, wherein the flexible strands are combined in an insulating tube.
17. Lüfter nach einem der vorhergehenden Ansprüche, bei welchem die elektrische Leitung (52) als mehradrige Mantelleitung ausgebildet ist. 17. Fan according to one of the preceding claims, wherein the electrical line (52) is designed as a multi-core sheathed line.
EP03753562A 2002-11-15 2003-10-16 Fan, in particular for a device Expired - Lifetime EP1561037B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10253227A DE10253227A1 (en) 2002-11-15 2002-11-15 Fans, especially device fans
DE10253227 2002-11-15
PCT/EP2003/011479 WO2004046557A1 (en) 2002-11-15 2003-10-16 Fan, in particular for a device

Publications (2)

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EP1561037A1 true EP1561037A1 (en) 2005-08-10
EP1561037B1 EP1561037B1 (en) 2006-03-01

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US (1) US6942471B2 (en)
EP (1) EP1561037B1 (en)
AT (1) ATE319013T1 (en)
AU (1) AU2003271732A1 (en)
DE (3) DE10253227A1 (en)
WO (1) WO2004046557A1 (en)

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DE10253227A1 (en) 2004-05-27
US6942471B2 (en) 2005-09-13
WO2004046557A1 (en) 2004-06-03
DE20316909U1 (en) 2004-02-12
US20040096325A1 (en) 2004-05-20
EP1561037B1 (en) 2006-03-01
AU2003271732A1 (en) 2004-06-15
ATE319013T1 (en) 2006-03-15
DE50302542D1 (en) 2006-04-27

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