EP2436933B1 - Support frame for axial fan - Google Patents
Support frame for axial fan Download PDFInfo
- Publication number
- EP2436933B1 EP2436933B1 EP11009570.0A EP11009570A EP2436933B1 EP 2436933 B1 EP2436933 B1 EP 2436933B1 EP 11009570 A EP11009570 A EP 11009570A EP 2436933 B1 EP2436933 B1 EP 2436933B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- support frame
- circuit board
- fan
- der
- frame 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.)
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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
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
- F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/002—Axial flow fans
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/601—Mounting; Assembling; Disassembling specially adapted for elastic fluid pumps
Definitions
- the invention relates to a support frame for mounting on a circuit board or the like.
- the US 6,130,820 describes a three-legged frame with which a small fan is attached at a predetermined distance above a circuit board.
- the support frame is spider-shaped with a receiving block and support elements arranged thereon for fastening to the printed circuit board.
- the mounting block has a recess in which a device fan is arranged.
- a support frame for mounting on a printed circuit board for mounting on a printed circuit board, according to claim 1.
- a support frame is provided to which a fan can be attached.
- This fan generates an air flow which is particularly suitable for cooling a printed circuit board, and it is possible to arrange and cool components on a printed circuit board even below such a support frame.
- Components with high heat generation can e.g. be placed directly at the fan in the strongest airflow. This can either be directed towards the circuit board or away from it in order to extract warm air from the circuit board.
- Such a support frame can be mounted easily and foolproof and is very stably attached to the circuit board after its assembly.
- Fig. 1 shows a schematic longitudinal section through an arrangement 1 according to the invention. Its main components are a fan 3 with a fan wheel 31, the fan blades of which are shown at 32, and with an electric motor 33 for driving the fan wheel 31. Furthermore, the arrangement 1 has a carrying frame 4, which carries the fan 3 and to which it is attached. Support elements 41a and latching elements 41b are formed on the support frame 4. By means of the locking elements 41b, the support frame 4 can be fastened on a printed circuit board 2 by clipping on. Components 21 to be cooled are shown schematically on the printed circuit board 2. Fig. 8 shows an alternative, preferred type of fastening on the printed circuit board 2.
- the fan 3 is arranged with its fan wheel 31 in such a way that on its side C facing away from the printed circuit board 2 it sucks in an air flow with a direction essentially perpendicular to the printed circuit board 2 (direction of the axis of rotation A of the fan 3). At least part of this air flow is through an air guide element 5, which has approximately the shape a bell has deflected so that this air flow runs approximately parallel to the circuit board 2 and thereby optimally cools the components 21.
- the ends 44 of the support elements 41a serve to support the arrangement 1 on the circuit board 2.
- the latching elements 41b each have a latching hook 43 at their ends for engaging behind a recess 22 in the circuit board 2.
- the support elements 41a have a positioning extension 44 for fixing the position on an associated, complementary recess 23 of the circuit board 2. This allows a simple, reversible assembly of the arrangement 1 on a circuit board 2.
- the electrical connection of the electric motor 33 can be carried out by soldering in the solder bath together with the soldering of the components 21.
- the electric motor 33 is electrically connected to wire connections 61 by means of a circuit board 6. This makes it possible to use normal fans with standardized electrical connections.
- the circuit board 6 rests on a flange or support member 45 of the support frame 4, which also carries the fan 3. In the assembled state, the ends 62 of the wire connections 61 are soldered to conductor tracks on the circuit board 2.
- the support member 45 has an inner raised edge 48 and an outer raised edge 49, which serve to receive the board 6.
- the latter has, as in Fig. 7 a radially extending connecting part 64, and this is interrupted by an interruption 49a ( Fig. 5 ) of the outer edge 49 guided radially outwards and with the vertically extending connecting lines 61 connected.
- the recess 48a in the inner edge 48 expands to fasten the motor 33 to the support member 45.
- Fig. 8 shows, one can use, for example, three connecting lines 61.
- the electronic components for the motor 33 for example a Hall sensor and a commutation module, are located in the circuit board 6, and therefore this has a predetermined position relative to the motor 33.
- the power supply to the circuit board 6 and to the motor 33 takes place via the radial connecting part 64.
- an electronically commutated mini fan has very small dimensions.
- an electronically commutated DC axial fan of the 250 series from ebm-papst has dimensions of 25 x 25 x 8 mm, a weight of 8 g, and a power consumption of 0.2 to 0.6 W.
- the entire arrangement as shown in 1 and 2 is shown, for example, can have an outer diameter of 55 mm and a height of 36 mm.
- the lines 61 are partially surrounded by a sheath 51 which is formed on the support frame 4.
- the arrangement 1 is designed on its side C facing away from the printed circuit board 2 for bearing against a housing wall or the like. So that no rattling noises occur here, and to separate cold and warm air from one another, a sealing ring 7 is provided, which is arranged in an annular groove 71 in an end section 42 of the carrying frame 4.
- Fig. 5 shows an oblique view from above of a not yet assembled support frame 4, in which the fan 3, the circuit board 6, the wire connection 61 and the sealing ring 7 are not shown.
- the support member 45 is integrally formed on the support frame 4 via webs 45a.
- the support members 41a made of plastic together with the support frame 4 and the latching members 41b, which are provided with latching extensions 43 at their ends, are elastically flexible, so that they can snap behind edges or openings in or on the printed circuit board 2.
- the fan wheel 31 is located in Fig. 1 Above an annular air passage opening 47, the outer circumference 47a, often also referred to as "venturi", is formed by an annular element 40 of the support frame 4. The outer circumference 47a widens downward.
- the air flow guide member 5 is arranged below the air passage opening 47 in such a way that it deflects the air flow generated in a direction approximately parallel to the printed circuit board 2.
- the air flow guide member 5 is preferably formed in one piece with the support frame 4 and molded on below the support member 45.
- the air guide member 5 preferably has approximately the shape of a bell, which widens downward in the radial direction R. It can therefore also be referred to as an air bell 5.
- the sheath 51 for the wire connections 61 is preferably designed as a protuberance from the air flow guide member 5.
- Fig. 2 shows this in a view obliquely from below onto the arrangement 1, specifically in a partial sectional view with a view of the wire connections 61 and the sheath 51.
- Fig. 4 shows an enlarged view of area II of Fig. 2 .
- Fig. 3 shows a partially sectioned side view of the arrangement 1.
- the arrangement 1 is mounted on a circuit board 2 by means of snap connections.
- the support frame 4 with the molded air flow guide member 5 is in Fig. 5 shown obliquely from above, the fan 3, the circuit board 6, the wire connections 61 and the sealing ring 7 not being shown.
- Fig. 6 shows a view of the support frame 4 from below, that is from the motor 33 printed circuit board side. In the middle you can see three holes 52, which are used to fasten the motor 33.
- the arrangement 1 is preferably operated in such a way that cold air is drawn in from the outside and supplied to the components to be cooled.
- the fan 3 can also be operated in the opposite direction, so that it sucks in heated air from the printed circuit board 2 and blows it out.
- Fig. 7 shows an exploded view of an arrangement 1 according to the invention.
- the circuit board 2 is shown below, which has recesses 23 for the ends 44 of the support members 41a and recesses 22 for the latching hook 43.
- the components on the circuit board are in Fig. 7 not shown.
- the support frame 4 is shown above the printed circuit board 2, as is the sealing ring 7 assigned to it and the circuit board 6.
- the latter is electrically connected via its arm 64 to approximately vertically extending connecting lines 61.
- the fan 3 with its fan blades 32 is located above the circuit board 6. It is fastened to the support member (flange) 45 of the support frame 4, preferably by a mechanical connection to the central projection 48 of the support member 45, which projection has a central recess in the assembled state 63 penetrates the board 6 and thereby centered.
- Fig. 8 shows a preferred alternative to Fig. 3 .
- a locking foot 80 is provided with a cylindrical inner recess 81 running in the longitudinal direction of this locking foot and with a round double spring 82.
- This has two resilient legs 64, 66 and tapers at the lower end to form a cone 68, which facilitates insertion into a round hole 70 in the printed circuit board 2.
- the legs 64, 66 are formed by a longitudinal cut 72 in the lower end of the latching foot 80.
- This has an annular groove 74 on its outside, which fits into the recess 70 and can be positively locked with it by being pressed into it.
- Fig. 8 shows this locked position.
- such a spring latching foot 80 enables assembly by latching in a precisely defined position, so that the support members 41a can be omitted.
- the 9 to 23 show different variants of the air guide 5 of the 1 to 8 . If electronic components 21 are located under this air guide element, it may be necessary to also cool these components by means of part of the cooling air flow.
- the 9 to 23 each show an air guide member 5, the position of which on the support frame 4 from the 1 to 8 emerges and that through - preferably three - webs 45a ( Fig. 5 ) is connected to the ring 40 of the support frame 4. These webs 45a are shown in FIG 9 to 23 not shown.
- the air guide 5 are, as in 1 to 8 , arranged on the carrier part (flange) 45 and are preferably in one piece with this.
- the outer edge 49 usually has an interruption 49a as shown in FIG Fig. 5 is shown. In 9 to 23 this interruption is not shown, but can be provided there in the same way.
- the outside of the air guide member 5 generally has an upper section 53 which runs essentially parallel to the axis of rotation A of the fan 3.
- the section 53 merges over a central section 54 into a lower section 55, which is rather perpendicular to the axis of rotation A.
- the air guide 5 has a series of equidistant holes 60 with a circular cross section, which are located approximately at the transition from area 53 to area 54.
- An equal number of holes 62 are provided at the area 55, also with a circular cross section.
- Fig. 10 largely agrees Fig. 9 match, but only holes 60 are provided there and not holes 62.
- twelve elongate recesses 64 are provided in the transition region 54, which, as shown, extend in the circumferential direction.
- twelve elongated recesses 66 are provided in the region 55, which likewise extend in the circumferential direction and are offset relative to the recesses 64 in the manner shown.
- twelve elongated recesses 68 are provided in the transition region 54, which extend in the direction from top to bottom, and between these are located in the region 55, twelve elongate recesses 70, which likewise extend from top to bottom.
- Fig. 18 shows an air guide member 5, in which twelve recesses 72 with a rectangular cross section are machined in the transition region 54. Likewise, twelve recesses 74 with a rectangular cross-section are machined in the region 55, and these are offset from the recesses 72.
- Fig. 24 shows another embodiment of an arrangement 101 according to the invention.
- the same reference numerals are used for identical or identically acting parts, and these parts are not described again.
- the arrangement 101 is mounted on a printed circuit board 2 which is shown in FIG Fig. 24 is indicated, and it is preferably used to create an in Fig. 24 not shown - to cool heat-sensitive component, which is directly under the arrangement 101 is attached to the circuit board 2.
- Fig. 1 shows such components 21.
- the arrangement 101 has a support frame 104 which, as in the previous exemplary embodiments, is designed approximately in the manner of an oil rig. It has four support legs, namely two guide legs 105, 106 and two latching legs 107, 108. The latter are designed like the spring latching foot 80 of the Fig. 8 . Reference is therefore made to the description there in order to avoid lengths.
- All support legs 105 to 108 have a support surface 105a, 106a, 107a, 108a, with which they are supported on the upper side of the printed circuit board 2 after assembly.
- the guide leg 105 has a guide pin 110 with the length d1
- the guide leg 106 has a guide pin 111 with the same length d1 but a smaller diameter.
- the latching sections 107b, 108b have a length d2 which is less than d1.
- a bore 112 serves to receive the guide pin 110, and a bore 113 serves to receive the locking leg 107 in the manner as in Fig. 8 has been described in detail for the locking leg 80.
- a bore (not shown) is provided for the locking leg 108, the dimensions of which correspond to those of the bore 113, and a bore (not shown) is provided for the guide leg 106, the diameter of which is smaller than the diameter of the bore 112.
- a plug connector 114 is also mounted on the printed circuit board 2 and is used for the electrical connection of the printed circuit board 2 to three metal pins 41, via which the motor 33 of the fan 3 or its connection board 6 is electrically connected to corresponding conductor tracks the circuit board 2 is connected.
- the four support legs 105 to 108 are hollow according to the invention and in their upper region merge into an essentially ring-shaped or tubular part 115, which merges into a flat edge 117 at the top, which runs perpendicular to the axis of rotation A and on its radially inner side is delimited by an upwardly projecting edge 119.
- a sealing ring 120 can be arranged on the edge 117 and serves to seal against a housing wall or the like.
- the edge 119 is frustoconical.
- the truncated cone 121 merges into a cylindrical section 123, within which the blades 32 of the fan 3 rotate during operation.
- a carrier part 127 is fastened via webs 125, and between this and the cylindrical section 123 there is an annular air passage opening 130, from which, during operation, a cooling air flow emerges downwards, which in FIG Fig. 25 is symbolically indicated at 132. (If necessary, the cooling air flow can also run in the opposite direction.)
- Fig. 25 shows, there is a groove-like recess 134 in the annular part 115, the flat edge 117 and the edge 119, the width b of which corresponds to the width of the arm 64 ( Fig. 7 ) the board 6 is adapted.
- This arm 64 widens at its free end to a hammer-like widening 64b, which in Fig. 25 is shown in section and whose width B is greater than the width b of the groove 134.
- This widening 64b is guided in a recess 136, which is complementary to it, in a box-like extension 138 of the support frame 104 and is there after assembly by two detent springs 140, 142 in held the way like that Fig. 25 shows so that the board 6 is securely held in the desired position after its assembly.
- This also ensures that the three metal pins 61, which are soldered to the circuit board 6, make contact with the contact member 114 during assembly and cannot be moved upward in the support frame 104.
- the motor 33 is permanently connected to the part 127, which has the shape of a saucer, in order to catch grease that could escape from the bearings of the motor 33 during operation and to avoid contamination of the printed circuit board 2.
- the figures also show a support frame for mounting a fan 3 at a distance from a printed circuit board 2, which support frame 4 has a support member 45 which is at a distance from the printed circuit board 2 in the assembled state and is designed as a support for a motor 33 of the fan 3, which support member 45 is surrounded by an air passage 47, which in turn is surrounded by an outer air guide member 14 which is connected to the support member 45 by at least one connecting member 45a, which connecting member 45a crosses the air passage 47, with mounting elements 41, 43, 44; 80, are provided for mounting the support frame 4 on the printed circuit board 2, and on the support member 45 on the side facing the printed circuit board 2, an air guide member 5 is provided, wherein in particular the air guiding element 5 is designed approximately in the manner of a bell, the open side of which faces the printed circuit board 2, wherein in particular the support member 45 is connected via webs 45a to a part 40 located radially outside the air passage opening 47, wherein in particular the part 40 located outside the air passage opening 47 is designed in the manner of a
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
Die Erfindung betrifft ein Tragegestell zur Montage an einer Leiterplatte oder dergleichen.The invention relates to a support frame for mounting on a circuit board or the like.
Es ist bekannt, mittels Klein- und Kleinstlüftern Bereiche einer Leiterplatte direkt zu kühlen, an denen viel Wärme erzeugt wird. Solche Bereiche werden gewöhnlich als "hot spots" bezeichnet, also als Wärmenester.It is known to directly cool areas of a printed circuit board by means of small and very small fans where a lot of heat is generated. Such areas are usually referred to as "hot spots".
Nachteilig hierbei ist, dass die Fläche, auf der ein solcher Lüfter montiert wird, nicht mehr für Bauelemente zur Verfügung steht, wie das die
Die
Ferner ist ein als Stand der Technik relevantes Tragegestell zur Montage an einer Leiterplatte aus dem Dokument
Es ist deshalb eine Aufgabe der Erfindung, eine neue Anordnung für die Kühlung einer Leiterplatte oder dgl. bereit zu stellen.It is therefore an object of the invention to provide a new arrangement for cooling a printed circuit board or the like.
Nach der Erfindung wird diese Aufgabe gelöst durch ein Tragegestell zur Montage an einer Leiterplatte, gemäß Anspruch 1. Hierbei ist ein Tragegestell vorgesehen, an dem ein Lüfter befestigt werden kann. Dieser Lüfter erzeugt einen Luftstrom, der für die Kühlung einer Leiterplatte besonders geeignet ist, und es ist möglich, auch unterhalb eines solchen Trägergestells Bauelemente auf einer Leiterplatte anzuordnen und zu kühlen. Bauelemente mit hoher Wärmeerzeugung können z.B. direkt beim Lüfter im stärksten Luftstrom angeordnet werden. Dieser kann entweder zur Leiterplatte hin gerichtet sein, oder von dieser weg, um warme Luft von der Leiterplatte abzusaugen.According to the invention, this object is achieved by a support frame for mounting on a printed circuit board, according to
Ein solches Tragegestell kann einfach und narrensicher montiert werden und ist nach seiner Montage sehr stabil an der Leiterplatte befestigt.Such a support frame can be mounted easily and foolproof and is very stably attached to the circuit board after its assembly.
Weitere Einzelheiten und vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den im Folgenden beschriebenen und in der Zeichnung dargestellten, in keiner Weise als Einschränkung der Erfindung zu verstehenden Ausführungsbeispielen, sowie aus den Unteransprüchen. Es zeigt:
- Fig. 1
- einen schematischen Schnitt durch eine erfindungsgemäße Anordnung mit einem Tragegestell, einem daran befestigten Kleinlüfter, sowie einem Luftleitelement zur Umlenkung des vom Lüfter erzeugten Luftstroms,
- Fig. 2
- eine Ansicht von schräg unten auf den Lüfter der
Fig. 1 , mit einer teilweisen Schnittdarstellung der elektrischen Verbindungselemente des Kleinlüfters, - Fig. 3
- eine teilweise geschnittene Seitenansicht der Anordnung nach den
, welche hier nach ihrer Montage auf einer Leiterplatte dargestellt ist,Figuren 1 und 2 - Fig. 4
- eine Darstellung der Einzelheit II der
Fig. 2 , - Fig. 5
- eine raumbildliche Darstellung eines Tragegestells und seines
Luftleitglieds 5, aber vor der Montage des Kleinlüfters, und gesehen von schräg oben, - Fig. 6
- eine raumbildliche Darstellung analog
Fig. 5 , aber gesehen von unten, also von der Leiterplattenseite her, - Fig. 7
- eine auseinander gezogene Darstellung einer Leiterplatte, eines Tragegestells, eines Lüfters, und der elektrischen Anschlusseiemente dieses Lüfters,
- Fig. 8
- eine Variante zu
Fig. 3 , bei der anstelle eines Rasthakens eine runde Doppelfeder verwendet wird, welche eine Ringnut hat, die in einerunde Bohrung 70 der - Fig. 9 bis 23
- verschiedene Varianten der bei den
Fig. 1 bis 8 verwendeten Luftleitglocke; diese Varianten ermöglichen es, auch elektronische Bauelemente, welche direkt unter dem Tragegestell angeordnet sind, mit einem vorgegebenen Anteil des vom Kleinlüfter erzeugten Kühlluftstroms zu kühlen, - Fig. 24
- eine stark vergrößerte, auseinandergezogene Darstellung eines anderen Ausführungsbeispiels einer erfindungsgemäßen Anordnung mit einem Tragegestell und einem Kleinlüfter, der mit einer Platine für seinen elektrischen Anschluss versehen ist und der, einschließlich Platine, an diesem Tragegestell befestigt wird, und
- Fig. 25
- eine raumbildliche Darstellung der Anordnung gemäß
Fig. 24 in einem Teilschnitt, gesehen längs der Linie XXV-XXV derFig. 24 , wobei die Platine in ihrem montierten Zustand, jedoch ohne den Lüfter, dargestellt ist.
- Fig. 1
- 2 shows a schematic section through an arrangement according to the invention with a carrying frame, a small fan attached to it, and an air guide element for deflecting the air flow generated by the fan,
- Fig. 2
- a view from below of the fan of the
Fig. 1 , with a partial sectional view of the electrical connection elements of the small fan, - Fig. 3
- a partially sectioned side view of the arrangement according to the
Figures 1 and 2 , which is shown here after mounting on a printed circuit board, - Fig. 4
- a representation of the detail II of the
Fig. 2 , - Fig. 5
- a spatial representation of a support frame and its
air guide 5, but before the assembly of the small fan, and seen obliquely from above, - Fig. 6
- a spatial representation analog
Fig. 5 , but seen from below, i.e. from the PCB side, - Fig. 7
- an exploded view of a circuit board, a support frame, a fan, and the electrical connection elements of this fan,
- Fig. 8
- a variant too
Fig. 3 , in which a round double spring is used instead of a latching hook, which has an annular groove which in around bore 70 of the - 9 to 23
- different versions of the
1 to 8 air baffle used; these variants make it possible to also cool electronic components, which are arranged directly under the support frame, with a predetermined proportion of the cooling air flow generated by the small fan, - Fig. 24
- a greatly enlarged, exploded view of another embodiment of an arrangement according to the invention with a support frame and a small fan, which is provided with a circuit board for its electrical connection and which, including the circuit board, is attached to this support frame, and
- Fig. 25
- a spatial representation of the arrangement according
Fig. 24 in a partial section, seen along the line XXV-XXV theFig. 24 , wherein the board is shown in its assembled state, but without the fan.
Gleiche Bezugszeichen bezeichnen in den Figuren gleiche oder gleich wirkende Elemente. Begriffe wie oben, unten, links, rechts beziehen sich auf die jeweilige Figur.In the figures, the same reference symbols denote the same or equivalent elements. Terms like above, below, left, right refer to the respective figure.
Der Lüfter 3 ist mit seinem Lüfterrad 31 so angeordnet, dass er auf seiner von der Leiterplatte 2 abgewandten Seite C einen Luftstrom mit einer im wesentlichen zur Leiterplatte 2 senkrechten Richtung (Richtung der Drehachse A des Lüfters 3) ansaugt. Zumindest ein Teil dieses Luftstroms wird durch ein Luftleitelement 5, das etwa die Gestalt einer Glocke hat, so umgelenkt, dass dieser Luftstrom etwa parallel zur Leiterplatte 2 verläuft und dadurch die Bauelemente 21 optimal kühlt.The
Die Anordnung 1 hat also eine Mehrfachfunktion:
- Sie ermöglicht durch die
Rastelemente 41bund die Abstützelemente 41a bzw. dieRastfüße 80 gemäßFig. 8 eine sehr schnelle Montage ander Leiterplatte 2. - Sie bildet ein Distanzglied, welches
den Lüfter 3 in einem gewünschten Abstandvon der Leiterplatte 2 hält. - Sie bildet eine äußere Umhüllung, nämlich einen sogenannten Venturikanal, für die
Flügel 32 desLüfters 3, d.h. siekomplettiert den Lüfter 3 zu einem Gerätelüfter üblicher Bauart. - Sie formt den Luftstrom so, dass die
Kühlung der Bauelemente 21 auf.der Leiterplatte 2 optimiert wird. - Sie reduziert die
Fläche der Leiterplatte 2, weil auch unterhalb der Anordnung 1Bauelemente 21 auf der Leiterplatte 2 montiert werden können, z.B. Bauelemente mit geringer Wärmeerzeugung, oder Bauelemente, für welche ein Teil des Luftstroms zur Kühlung abgezweigt wird, wie das nachfolgend anhand derFig. 9 erläutert wird.bis 23
- It is made possible by the latching
elements 41b and the supportingelements 41a or the latchingfeet 80 according to FIGFig. 8 very quick assembly on the printedcircuit board 2. - It forms a spacer which keeps the
fan 3 at a desired distance from thecircuit board 2. - It forms an outer casing, namely a so-called Venturi channel, for the
blades 32 of thefan 3, ie it completes thefan 3 to form a device fan of the usual type. - It shapes the air flow so that the cooling of the
components 21 on thecircuit board 2 is optimized. - It reduces the area of the printed
circuit board 2, becausecomponents 21 can also be mounted on the printedcircuit board 2 below thearrangement 1, for example components with low heat generation, or components for which a part of the air flow is branched off for cooling, as is shown below with reference to FIG9 to 23 is explained.
Die Enden 44 der Abstützelemente 41a dienen zur Abstützung der Anordnung 1 auf der Leiterplatte 2. Die Rastelemente 41b haben an ihren Enden jeweils einen Rasthaken 43 zum Hintergreifen einer Ausnehmung 22 der Leiterplatte 2. Die Abstützelemente 41a haben einen Positionierfortsatz 44 zur Lagefixierung an einer zugeordneten, komplementären Ausnehmung 23 der Leiterplatte 2. Hierdurch ist eine einfache, reversible Montage der Anordnung 1 auf einer Leiterplatte 2 möglich. Der elektrische Anschluss des Elektromotors 33 kann durch Verlöten im Lötbad zusammen mit dem Verlöten der Bauelemente 21 erfolgen. Hierzu ist der Elektromotor 33 mittels einer Platine 6 elektrisch mit Drahtverbindungen 61 verbunden. Dies ermöglicht es, normale Lüfter mit standardisierten elektrischen Anschlüssen zu verwenden. Die Platine 6 ruht hierbei auf einem auch den Lüfter 3 tragenden Flansch bzw. Abstützglied 45 des Tragegestells 4. Die Enden 62 der Drahtverbindungen 61 sind im montierten Zustand mit Leiterbahnen auf der Leiterplatte 2 verlötet.The ends 44 of the
Wie
Wie
Hier ist darauf hinzuweisen, dass ein elektronisch kommutierter Kleinstlüfter sehr geringe Abmessungen hat. Z.B. hat ein elektronisch kommutierter DC-Axiallüfter der Serie 250 von ebm-papst Abmessungen von 25 x 25 x 8 mm, ein Gewicht von 8 g, und eine Leistungsaufnahme von 0,2 bis 0,6 W. Die gesamte Anordnung, wie sie in
Die Leitungen 61 sind zu ihrem Schutz teilweise von einer Umhüllung 51 umgeben, welche am Tragegestell 4 ausgebildet ist.To protect them, the
Die Anordnung 1 ist auf ihrer von der Leiterplatte 2 abgewandten Seite C zur Anlage gegen eine Gehäusewand oder dergleichen ausgebildet. Damit hier keine Klappergeräusche entstehen, und um kalte und warme Luft voneinander zu trennen, ist ein Dichtring 7 vorgesehen, der in einer Ringnut 71 eines Stirnabschnitts 42 des Tragegestells 4 angeordnet ist.The
Das Abstützglied 45 ist über Stege 45a am Tragegestell 4 angeformt. Die aus Kunststoff zusammen mit dem Tragegestell 4 gefertigten Stützglieder 41a und die Rastglieder 41b, welche an ihren Enden mit Rastfortsätzen 43 versehen sind, sind elastisch nachgiebig, so dass sie hinter Kanten oder Öffnungen in oder an der Leiterplatte 2 einrasten können.The
Am Tragegestell 4 ist auch ein Luftstromleitglied 5 zur gezielten Umlenkung des vom LüfterOn the
Das Lüfterrad 31 befindet sich in
Zur Formung des Luftstroms in Richtung parallel zur Leiterplatte 2 hat das Luftleitglied 5 bevorzugt etwa die Form einer Glocke, die sich nach unten in radialer Richtung R erweitert. Man kann es deshalb auch als Luftleitglocke 5 bezeichnen.To shape the air flow in the direction parallel to the printed
Die Umhüllung 51 für die Drahtverbindungen 61 ist bevorzugt als Ausstülpung aus dem Luftstromleitglied 5 ausgebildet.
Das Tragegestell 4 mit dem daran angeformten Luftstromleitglied 5 ist in
Die Anordnung 1 wird bevorzugt derart betrieben, dass kalte Luft von außen angesaugt und den zu kühlenden Bauteilen zugeführt wird. Alternativ kann der Lüfter 3 auch in der entgegengesetzten Richtung betrieben werden, so dass er erwärmte Luft von der Leiterplatte 2 ansaugt und nach außen ausbläst.The
Oberhalb der Leiterplatte 2 ist das Tragegestell 4 dargestellt, ebenso der diesem zugeordnete Dichtring 7 und die Platine 6. Letztere ist über ihren Arm 64 elektrisch mit etwa vertikal verlaufenden Anschlussleitungen 61 verbunden.The
Oberhalb der Platine 6 befindet sich der Lüfter 3 mit seinen Lüfterflügeln 32. Er wird an dem Stützglied (Flansch) 45 des Tragegestells 4 befestigt, bevorzugt durch eine mechanische Verbindung mit dem zentralen Vorsprung 48 des Abstützglieds 45, welcher Vorsprung im montierten Zustand eine zentrale Ausnehmung 63 der Platine 6 durchdringt und diese dadurch zentriert.The
Auf diese Weise ermöglicht ein solcher Feder-Rastfuß 80 eine Montage durch Einrasten in einer genau definierten Position, so dass die Abstützglieder 41a entfallen können.In this way, such a
Die
Die Luftleitglieder 5 sind, ebenso wie in
Die Außenseite des Luftleitglieds 5 hat generell einen oberen Abschnitt 53, der im wesentlichen parallel zur Drehachse A des Lüfters 3 verläuft. Der Abschnitt 53 geht über einen mittleren Abschnitt 54 über in einen unteren Abschnitt 55, der eher senkrecht zur Drehachse A verläuft. Diese Abschnitte sind nur in
In
Auf diese Weise kann eine relativ große Menge an Luft unter das Luftleitglied (5) fließen und dort kühlend wirken.
Umgekehrt ist es bei
In
Bei der Variante nach
Bei
Bei
Bei
Bei
Die Anordnung 101 hat ein Tragegestell 104, das, wie bei den vorhergehenden Ausführungsbeispielen, etwa nach Art einer Bohrinsel ausgebildet ist. Es hat vier Stützbeine, nämlich zwei Führungsbeine 105, 106 und zwei Rastbeine 107, 108. Letztere sind so ausgebildet, wie der Feder-Rastfuß 80 der
Alle Stützbeine 105 bis 108 haben eine Stützfläche 105a, 106a, 107a, 108a, mit der sie nach der Montage auf der Oberseite der Leiterplatte 2 abgestützt sind. Das Führungsbein 105 hat einen Führungszapfen 110 mit der Länge d1, und ebenso hat das Führungsbein 106 einen Führungszapfen 111 mit der gleichen Länge d1, aber einem kleineren Durchmesser. Bei den Rastbeinen 107, 108 haben die Rastabschnitte 107b, 108b eine Länge d2, die kleiner ist als d1.All
Entsprechend sind auf der Leiterplatte 2 vier Bohrungen vorgesehen, von denen in
Für das Rastbein 108 ist eine (nicht dargestellte) Bohrung vorgesehen, deren Maße denen der Bohrung 113 entsprechen, und für das Führungsbein 106 ist eine (nicht dargestellte) Bohrung vorgesehen, deren Durchmesser kleiner ist als der Durchmesser der Bohrung 112.A bore (not shown) is provided for the locking
Auf diese Weise wird eine korrekte und dabei einfache Befestigung der Anordnung 101 auf der Leiterplatte 2 gewährleistet, da zuerst die Führungszapfen 110, 111 in die entsprechende Bohrungen der Leiterplatte 2 eingeführt werden müssen, was nur in einer bestimmten Drehstellung möglich ist, und es erst dann überhaupt möglich ist, den Rastabschnitt 107b in der Bohrung 113 und dem Rastabschnitt 108b in der entsprechenden (nicht dargestellten) Bohrung zu verrasten, da die Abstände d1 größer sind als die Abstände d2.In this way, a correct and simple attachment of the
Auf der Leiterplatte 2 ist auch ein Steckverbinder 114 montiert, der zur elektrischen Verbindung der Leiterplatte 2 mit drei Metallstiften 41 dient, über welche der Motor 33 des Lüfters 3 bzw. dessen Anschlussplatine 6 elektrisch mit entsprechenden Leiterbahnen auf der Leiterplatte 2 verbunden wird.A plug connector 114 is also mounted on the printed
Die vier Stützbeine 105 bis 108 sind erfindungsgemäß hohl ausgebildet und gehen in ihrem oberen Bereich in ein im Wesentlichen ring- oder rohrförmiges Teil 115 über, das oben in einen flachen Rand 117 übergeht, der senkrecht zur Drehachse A verläuft und der auf seiner radial inneren Seite durch einen nach oben ragenden Rand 119 begrenzt ist. Ein Dichtring 120 kann auf dem Rand 117 angeordnet werden und dient zur Abdichtung gegen eine Gehäusewand oder dgl. Auf seiner Innenseite 121 ist der Rand 119 kegelstumpfförmig ausgebildet. Der Kegelstumpf 121 geht über in einen zylindrischen Abschnitt 123, innerhalb dessen sich im Betrieb die Flügel 32 des Lüfters 3 drehen.The four
Am unteren Ende des zylindrischen Abschnitts 123 ist über Stege 125 ein Trägerteil 127 befestigt, und zwischen diesem und dem zylindrischen Abschnitt 123 befindet sich eine ringförmige Luftdurchtrittsöffnung 130, aus der im Betrieb ein Kühlluftstrom nach unten austritt, der in
Wie
Der Motor 33 wird nach seiner Montage mit dem Teil 127 dauerhaft verbunden, das etwa die Form einer Untertasse hat, um Schmierfett, das im Betrieb aus den Lagern des Motors 33 austreten könnte, aufzufangen und eine Verunreinigung der Leiterplatte 2 zu vermeiden.After assembly, the
Naturgemäß sind im Rahmen der vorliegenden Erfindung vielfache Abwandlungen und Modifikationen möglich.Naturally, numerous modifications and modifications are possible within the scope of the present invention.
Die Figuren zeigen eine Anordnung für die Kühlung einer Leiterplatte 2 oder dgl., welche Anordnung aufweist: Ein Tragegestell 4, welches aufweist
41, 43, 44; 80 zur VerbindungElemente mit der Leiterplatte 2 und zur Abstützung an dieser,- eine ringartige Luftdurchtrittsöffnung 47,
- und einen Klein-
oder Kleinstlüfter 3, welcher an dervon der Leiterplatte 2 abgewandten Seite C des Tragegestells 4 und im Abstand von der Leiterplatte befestigt undmit einem Lüfterrad 31 versehen ist, das sich im Betrieb um eine Drehachse A dreht und dabei Luft durch die ringförmige Luftdurchtrittsöffnung 47 transportiert,
wobei
wobei
wobei
wobei bevorzugt das außerhalb der Luftdurchtrittsöffnung 47
wobei bevorzugt zum Antrieb des
wobei bevorzugt die
wobei bevorzugt die Außenseite des Lüfterrades 31 zusammen
wobei bevorzugt sich der Querschnitt des Ringraumes 47 in Richtung zu dessen Auslass erweitert,
wobei
wobei innerhalb der Stirnfläche 42 eine Vertiefung vorgesehen ist, innerhalb welcher der Lüfter 3 angeordnet ist,
wobei
wobei bevorzugt der Lüfter 3 dazu ausgebildet ist, Luft, die
wobei bevorzugt der Lüfter 3 dazu ausgebildet ist, Luft durch die Luftdurchtrittsöffnung 47 in einer Richtung zu transportieren, welche
-
41, 43, 44; 80 for connection to and for support on the printedElements circuit board 2, - an annular
air passage opening 47, - and a small or very
small fan 3, which is attached to the side C of thesupport frame 4 facing away from the printedcircuit board 2 and at a distance from the printed circuit board and is provided with afan wheel 31 which rotates in operation about an axis of rotation A and thereby air through the transported annularair passage opening 47,
wherein the
the
the
the
wherein preferably an electronically commutated
the
the outside of the
the cross section of the
the carrying
a recess is provided within the
wherein the
wherein the
wherein the
Die Figuren zeigen auch ein Tragegestell zur Montage eines Lüfters 3 im Abstand von einer Leiterplatte 2, welches Tragegestell 4 ein Abstützglied 45 aufweist, das im montierten Zustand einen Abstand von der Leiterplatte 2 hat und als Träger für einen Motor 33 des Lüfters 3 ausgebildet ist, welches Abstützglied 45 von einem Luftdurchlass 47 umgeben ist, der seinerseits von einem äußeren Luftführungsglied 14 umgeben ist, welches durch mindestens ein Verbindungsglied 45a mit dem Abstützglied 45 verbunden ist, welches Verbindungsglied 45a den Luftdurchlass 47 kreuzt, wobei Montageelemente 41, 43, 44; 80, zur Montage des Tragegestells 4 an der Leiterplatte 2 vorgesehen sind, und an dem Abstützglied 45 auf dessen der Leiterplatte 2 zugewandten Seite ein Luftleitglied 5 vorgesehen ist,
wobei insbesondere das Luftleitelement 5 etwa nach Art einer Glocke ausgebildet ist, deren offene Seite der Leiterplatte 2 zugewandt ist,
wobei insbesondere das Abstützglied 45 über Stege 45a mit einem radial außerhalb der Luftdurchtrittsöffnung 47 gelegenen Teil 40 verbunden ist,
wobei insbesondere das außerhalb der Luftdurchtrittsöffnung 47 gelegene Teil 40 nach Art eines Rohrabschnittes ausgebildet ist,
wobei insbesondere zum Antrieb des Lüfters 3 ein elektronisch kommutierter Motor 33 vorgesehen ist, welcher zur Befestigung am Abstützglied 45 ausgebildet ist,
wobei insbesondere zwischen diesem Motor 32 und dem Abstützglied 45 eine Platine 6 angeordnet ist, welche zur Verbindung des Motors 33 mit elektrischen Anschlussleitungen 61 ausgebildet ist,
wobei insbesondere die Platine 6 elektronische Bauelemente für die Kommutierung des Motors 33 aufweist,
wobei insbesondere die elektrischen Anschlussleitungen 62 geführt sind, welche Leitungen auf ihrer Leiterplattenseite D zur elektrischen Kontaktierung mit der Leiterplatte 2 ausgebildet sind,
wobei insbesondere die Anschlussleitungen als Drahtverbindungen 61 ausgebildet sind, welche wenigstens teilweise von einer Umhüllung 51 umgeben sind, die von Teilen des Tragegestells 4 und / oder des Luftleitelements 5 gebildet sind,
wobei insbesondere die Außenseite des Lüfterrades 31 zusammen mit der Innenseite 47a des nach Art eines Rohrabschnittes ausgebildeten Teiles 40 einen Ringraum 47 bildet, innerhalb dessen sich im Betrieb die Flügel 32 des Lüfterrades 31 drehen,
wobei insbesondere sich der Querschnitt des Ringraumes 47 im Bereich mindestens eines Endabschnitts erweitert,
wobei insbesondere das Tragegestell auf seiner von der Leiterplatte 2 abgewandten Seite eine Stirnfläche 42 aufweist, an der ein Dichtring 7 angeordnet ist,
wobei insbesondere innerhalb der Stirnfläche 42 eine Vertiefung zur Aufnahme eines Lüfters 3 vorgesehen ist,
wobei insbesondere das Luftleitglied 5 mit mindestens einer Durchbrechung 60, 61, 61, 64, 66, 68, 70, 72, 74, 76, 78 versehen ist.The figures also show a support frame for mounting a
wherein in particular the
wherein in particular the
wherein in particular the
an electronically commutated
in particular between this
the
in particular the electrical connecting
in particular the connecting lines are designed as
in particular the outside of the
in particular, the cross section of the
wherein in particular the carrying frame has an
a recess for receiving a
wherein in particular the
Claims (10)
- A support frame for installation on a circuit board (2), which support frame is configured in the manner of a drilling rig and comprises a platform (117) that is equipped with supporting legs (105, 106, 107, 108) for mounting on the circuit board (2), which support frame has, at the center of the platform (117), a depression (121, 123; 40, 47a) that is configured for installation of a fan (3) that has an air passthrough opening (130, 47), wherein in the installed state, the air passthrough opening (130, 47) is at a distance from the circuit board (2), characterized in that when the fan is in the installed state, the outer wall (123; 47a) of the depression (121,123; 40, 47a) forms a part of the air passthrough opening (130, 47) of the fan and the supporting legs (105 to 108) are configured as at least partially hollow.
- The support frame according to claim 1, in which the supporting legs (105 to 108) are configured as integral with the platform (117).
- The support frame according to either of claims 1 to 2, in which at least one supporting leg (107, 108) is equipped with a latching element (107b, 108b) for latching into an associated recess (113) in the circuit board (2).
- The support frame according to any one of claims 1 to 3, in which at least one supporting leg (105, 106) is provided that has no latching element and that is longer than a supporting leg (107, 108) that is equipped with a latching element (107b, 108b).
- The support frame according to any one of claims 1 to 4, in which at least one supporting leg (105, 106) is provided that has no latching element and that has, at its free end, a portion (110, 111), the diameter of which is complementary to the diameter of a predetermined recess (112) in the circuit board (2), which recess is associated with that supporting leg in the installed state.
- The support frame according to any one of the preceding claims, on which electrically conductive elements (61) are provided, which are configured to form, upon installation of the support frame on a circuit board (2), an electrical connection to a counter element (114) provided on the circuit board.
- The support frame according to claim 6, in which the electrically conductive elements are configured in the manner of pins (61).
- The support frame according to claim 6 or 7, in which the electrically conductive elements (61) are electrically connected to a circuit plate (6), which is configured to supply electrical energy to a fan (3) arranged on the support frame (104).
- The support frame according to claim 8, on which the circuit plate (6) is immobilized in a predetermined position in the installed state.
- The support frame according to claim 9, in which for immobilizing the circuit plate (6), at least one latching spring (140, 142) is provided, which latches the circuit plate (6) in a predetermined position.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202004019747 | 2004-10-19 | ||
DE202005015079 | 2005-09-19 | ||
PCT/EP2005/010652 WO2006042635A1 (en) | 2004-10-19 | 2005-10-04 | Assembly used for cooling a circuit board or similar |
EP05791377.4A EP1702165B1 (en) | 2004-10-19 | 2005-10-04 | Assembly used for cooling a circuit board or similar |
Related Parent Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05791377.4 Division | 2005-10-04 | ||
EP05791377.4A Division EP1702165B1 (en) | 2004-10-19 | 2005-10-04 | Assembly used for cooling a circuit board or similar |
EP05791377.4A Division-Into EP1702165B1 (en) | 2004-10-19 | 2005-10-04 | Assembly used for cooling a circuit board or similar |
Publications (4)
Publication Number | Publication Date |
---|---|
EP2436933A2 EP2436933A2 (en) | 2012-04-04 |
EP2436933A8 EP2436933A8 (en) | 2012-05-16 |
EP2436933A3 EP2436933A3 (en) | 2018-01-24 |
EP2436933B1 true EP2436933B1 (en) | 2020-06-03 |
Family
ID=35482279
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11009570.0A Active EP2436933B1 (en) | 2004-10-19 | 2005-10-04 | Support frame for axial fan |
EP05791377.4A Not-in-force EP1702165B1 (en) | 2004-10-19 | 2005-10-04 | Assembly used for cooling a circuit board or similar |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05791377.4A Not-in-force EP1702165B1 (en) | 2004-10-19 | 2005-10-04 | Assembly used for cooling a circuit board or similar |
Country Status (3)
Country | Link |
---|---|
US (1) | US7390172B2 (en) |
EP (2) | EP2436933B1 (en) |
WO (1) | WO2006042635A1 (en) |
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- 2005-10-04 US US10/574,988 patent/US7390172B2/en not_active Expired - Fee Related
- 2005-10-04 EP EP05791377.4A patent/EP1702165B1/en not_active Not-in-force
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Also Published As
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US7390172B2 (en) | 2008-06-24 |
WO2006042635A1 (en) | 2006-04-27 |
EP1702165A1 (en) | 2006-09-20 |
EP2436933A8 (en) | 2012-05-16 |
US20060228237A1 (en) | 2006-10-12 |
EP2436933A2 (en) | 2012-04-04 |
EP1702165B1 (en) | 2015-12-30 |
EP2436933A3 (en) | 2018-01-24 |
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