EP0593860A1 - Spiral housing for radial blower - Google Patents

Spiral housing for radial blower Download PDF

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Publication number
EP0593860A1
EP0593860A1 EP93111713A EP93111713A EP0593860A1 EP 0593860 A1 EP0593860 A1 EP 0593860A1 EP 93111713 A EP93111713 A EP 93111713A EP 93111713 A EP93111713 A EP 93111713A EP 0593860 A1 EP0593860 A1 EP 0593860A1
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EP
European Patent Office
Prior art keywords
deep
housing part
collar
housing
side wall
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Granted
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EP93111713A
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German (de)
French (fr)
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EP0593860B1 (en
Inventor
André Bottländer
Eckhard Kucharczyk
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Siegenia Aubi KG
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Siegenia Frank KG
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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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • 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
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/626—Mounting or removal of fans

Definitions

  • the invention relates to a spiral housing made of plastic material for radial fans for decentralized room ventilation, which has a closed side wall, a side wall provided with a suction opening and a spiral circumferential wall arranged between them, which is provided with a tangentially adjoining outlet opening, consisting of two along a normal housing parts interconnected to the plane of the fan axis.
  • Radial blowers with a spiral housing made of plastic material are used as cooling and / or circulating air blowers in household appliances and are required for this purpose in quantities that enable large-scale production.
  • the spiral housing is manufactured as injection molded parts that have a design adapted to the intended use.
  • the known radial fans with spiral housings made of plastic material are not readily usable, because the spiral housings must be given a different design.
  • the injection molding tools for the manufacture of the spiral housing require a high cost, but ventilation devices for decentralized room ventilation are only required in relatively small numbers, it is not worthwhile to provide special injection molding tools for this, which then require a very long payback period.
  • radial fans are used in room ventilation devices, usually with spiral casings made of sheet metal are equipped and are available relatively inexpensively.
  • the radial fans cause a relatively strong intrinsic noise resulting from vibrations of the sheet metal housing during operation, which must be counteracted by additional measures, in particular elastic suspensions and brackets.
  • the aim of the invention is to create a spiral housing made of plastic material, which can still be produced inexpensively even in small quantities and which has a high internal damping, which enables a simplified installation of the radial blowers in room ventilation devices, in particular sound insulation fans.
  • the object is achieved in a simple manner by that the housing parts are formed by vacuum deep-drawing bodies made of plate material, each of which has an angled rim or collar, that the circumferential contour of the first deep-drawn body is dimensioned larger by the plate material thickness than the circumferential contour of the second deep-drawn body, that the rim or collar of the second deep-drawn body has a height which corresponds approximately to the inside width of the volute casing, that a larger number of lugs protrude outward from the end edges of the rim or collar on the second deep-drawing body along the circumferential contour, and that the first deep-drawn body in its rim or collar near the side wall contains recesses in which the lugs on the rim or collar of the second deep-drawn body can be locked.
  • Forming tools that enable vacuum deformation of flat sheet material into deep-drawn bodies can be produced relatively easily and inexpensively, for example from wood, and be designed so that the side wall and The edge or collar of the deep-drawn body that can be assembled into the spiral housing is given an optimally streamlined shape.
  • the end edges of the rim or collar on the second deep-drawn body can be reworked, for example with the help of a freely programmable five-axis milling machine, so that the outwardly projecting lugs are obtained on them.
  • the recesses can be made in the same manner in the edge or collar of the first deep-drawn body near the side wall with the aid of a finger cutter.
  • the sheet material used to manufacture the vacuum deep-drawn body can be, for example, polyvinyl chloride (PVC), standard polystyrene (PS) or impact-resistant polystyrene (SB), the inherent elasticity of which ensures that the lugs on the edge or collar of the second deep-drawn body provide an automatic and secure snap connection enter with the recesses in the rim or collar of the first thermoformed body when the two thermoformed bodies are plugged together axially parallel to their marginal rims or collar.
  • PVC polyvinyl chloride
  • PS standard polystyrene
  • SB impact-resistant polystyrene
  • a flat, circular bowl is formed from the side wall of the first deep-drawing body, the center of which has a cover position with the center of the volute casing, that the bowl bottom has an inwardly arched shape, and that bayonet-like openings are provided in the peripheral wall of the cup, in which the stator of a blower motor via radial arms against the spring force of the arched Cup base - can be locked by a simple, limited angular rotation relative to the deep-drawn body.
  • the bayonet-like openings in the peripheral wall of the cup can also be produced in a simple manner, for example with the aid of a freely programmable five-axis milling machine.
  • corresponding passage openings for the radial arms on the stator of the blower motor in the side wall of the first deep-drawn molded part can also be provided with the bayonet-like openings in the peripheral wall of the cup.
  • a hump or knobs can be formed from the side wall of the first deep-drawn body in such a way that it lies in the rotating circle area of the radial arms of the blower motor stator and thereby comes into operative connection with one of the radial arms in its engagement position as a rotational position lock.
  • a radial fan 1 is shown in cross section, in which a fan wheel 3 is accommodated in a so-called spiral housing 2, which sits on the rotor 4 of an electric motor 5, which in turn is fastened in the spiral housing 2.
  • the entire radial fan 1 with spiral housing 2, impeller 3, rotor 4 and electric motor 5 has a relative small and flat design, as clearly shown in Fig. 1 of the drawing.
  • the spiral housing 2 of the radial fan 1 is composed of two housing parts 6 and 7, which are connected to one another along a plane 9-9 lying normal to the fan axis 8-8.
  • Both housing parts 6 and 7 of the spiral housing 2 are produced as vacuum deep-drawn bodies made of a plastic plate material, for example made of polyvinyl chloride (PVC) from standard polystyrene (PS) or impact-resistant polystyrene (SB), by first plasticizing the flat plate material by the action of heat and then by Creation of a vacuum against the contours of a wooden mold or the like is created.
  • a plastic plate material for example made of polyvinyl chloride (PVC) from standard polystyrene (PS) or impact-resistant polystyrene (SB)
  • the housing part 6 is formed by a first vacuum deep-drawing body, which has a closed side wall 10 and an angled edge rim or collar 11 which adjoins the contour thereof.
  • a flat, circular bowl 12 is formed, the center of which coincides with the center of the spiral housing 2 and consequently also has a covering position with the fan axis 8-8.
  • the bowl bottom 13 has an inwardly arched shape and in the peripheral wall 14 of the bowl 12 several bayonet-like openings 15, 16, 17 are provided evenly distributed in the circumferential direction, which are only partially shown in FIGS. 4, 5 and 6.
  • each of these bayonet-like openings 15, 16, 17 in the peripheral wall 14 of the bowl 12 corresponds to a passage opening 19, 20, 21, which are provided in the side wall 10 of the housing part 6 in a manner which from Fig. 3 of the drawing can be seen.
  • the stator 21 hits the inwardly curved cup base 13 and deforms it elastically outwards.
  • Slit-like recesses 26 are provided near the side wall 10 in the rim or collar 11 of the housing part 6, namely in a larger number, distributed as uniformly as possible along the circumferential contour. 3 that the housing part 6 is provided with five recesses 26. These recesses 26 can either, as shown in FIG. 2, run straight and parallel to the side wall 10. However, as indicated in FIG. 8, they can also be provided with an arcuate course.
  • the housing part 7 of the spiral housing 7 is also produced as a vacuum deep-drawing body made of plate material, in the same way as the housing part 6. It has an essentially flat side wall 27, into which an intake neck 28 is formed as an opening in alignment with the blower axis 8-8.
  • the peripheral contour of the second vacuum deep-drawing body forming the housing part 7 is matched to the peripheral contour of the housing part 6.
  • the housing part 7 also has a rim or collar 29 directed at right angles to its side wall 27. However, this has a height which approximately corresponds to the inside width 30 of the spiral housing 2, as can be clearly seen from FIG. 1.
  • slot-like recesses 26 according to FIG. 2 have to be made relatively narrow if they are to interact with the lugs 32 as a low-play snap-locking device, it is possible in the arcuate configuration according to FIG. 8 to give the recesses 26 a larger opening width. Nevertheless, they cooperate with the lugs 32 as a low-play snap-in device, because the latter have a three-point system on the arc contour.
  • the spiral housing 2 of the radial blowers 1 described above can still be manufactured inexpensively with relatively small quantities and at the same time have the advantage of a relatively high internal damping because they are formed from plastic sheet material by vacuum deformation.

Abstract

A spiral housing 2 for a radial blower 1 for decentralised room ventilation is proposed, which has a closed side wall 10, a side wall 27 provided with a suction opening 28, and, arranged between these, a spirally running circumferential wall which is provided with a blow-out opening, the spiral housing 2 consisting of two housing parts 6 and 7 interconnected along a plane lying perpendicularly to the blower axis 8 - 8. It is essential in this spiral housing 2 that the housing parts 6 and 7 are formed from vacuum deep-drawn bodies made of plastic plate material, each of which has a bent-off edge rim or collar 11 or 29, that the circumferential contour of the first deep-drawn body forming the housing part 6 is dimensioned greater by the plate material thickness than the circumferential contour of the second deep-drawn body forming the housing part 7, that the edge rim or collar 29 of the housing part 7 has a height which corresponds approximately to the clear construction width 30 of the spiral housing 2, that a relatively large number of noses 32 projects outwards from the end edges 31 of the edge rim or collar 27 on the second housing part 7 along the circumferential contour, and that the housing part 6 contains in its edge rim or collar 11, close to the side wall 10, cutouts 26, in which the noses 32 on the edge rim or collar 29 of the housing part 7 can be engaged. <IMAGE>

Description

Die Erfindung betrifft ein Spiralgehäuse aus Kunststoffmaterial für Radialgebläse zur dezentralen Raumlüftung, das eine geschlossene Seitenwand, eine mit einer Ansaugöffnung versehene Seitenwand und eine zwischen diesen angeordnete, spiralig verlaufende Umfangswand aufweist, die mit einer tangential anschließenden Ausblasöffnung versehen ist, bestehend aus zwei längs einer normal zur Gebläseachse liegenden Ebene miteinander verbundenen Gehäuseteilen.The invention relates to a spiral housing made of plastic material for radial fans for decentralized room ventilation, which has a closed side wall, a side wall provided with a suction opening and a spiral circumferential wall arranged between them, which is provided with a tangentially adjoining outlet opening, consisting of two along a normal housing parts interconnected to the plane of the fan axis.

Radialgebläse mit Spiralgehäuse aus Kunststoffmaterial finden Anwendung als Kühl- und/oder Umluftgebläse in Haushaltgeräten und werden zu diesem Zweck in Stückzahlen benötigt, die eine Großserienfertigung ermöglichen. Dabei sind die Spiralgehäuse als Spritzguß-Formteile hergestellt, die eine an den vorgesehenen Einsatzzweck angepaßte Gestaltung haben. Für die Benutzung in Lüftungsvorrichtungen, die der dezentralen Raumlüftung dienen sollen, sind die bekannten Radialgebläse mit Spiralgehäusen aus Kunststoffmaterial jedoch nicht ohne weiteres einsatzfähig, weil hierfür die Spiralgehäuse eine andere Ausbildung erhalten müssen. Da jedoch die Spritzgießwerkzeuge für die Herstellung der Spiralgehäuse einen hohen Kostenaufwand erfordern, Lüftungsvorrichtungen zur dezentralen Raumlüftung jedoch nur in relativ kleinen Stückzahlen benötigt werden, ist es nicht lohnend, hierfür besondere Spritzgießwerkzeuge bereit zu stellen, die dann einer sehr langen Amortisationszeit bedürfen. Bei Raumlüftungsvorrichtungen werden vielmehr Radialgebläse eingesetzt, die üblicherweise mit Spiralgehäusen aus Blech ausgestattet sind und relativ kostengünstig zur Verfügung stehen. Es wird dabei jedoch der Nachteil in Kauf genommen, daß die Radialgebläse im Betrieb ein aus Vibrationen des Blechgehäuses resultierendes, relativ starkes Eigengeräusch verursachen, dem durch zusätzliche Maßnahmen, insbesondere elastische Aufhängungen und Halterungen, entgegengewirkt werden muß.Radial blowers with a spiral housing made of plastic material are used as cooling and / or circulating air blowers in household appliances and are required for this purpose in quantities that enable large-scale production. The spiral housing is manufactured as injection molded parts that have a design adapted to the intended use. For use in ventilation devices that are intended to serve decentralized room ventilation, however, the known radial fans with spiral housings made of plastic material are not readily usable, because the spiral housings must be given a different design. However, since the injection molding tools for the manufacture of the spiral housing require a high cost, but ventilation devices for decentralized room ventilation are only required in relatively small numbers, it is not worthwhile to provide special injection molding tools for this, which then require a very long payback period. Rather, radial fans are used in room ventilation devices, usually with spiral casings made of sheet metal are equipped and are available relatively inexpensively. However, there is the disadvantage that the radial fans cause a relatively strong intrinsic noise resulting from vibrations of the sheet metal housing during operation, which must be counteracted by additional measures, in particular elastic suspensions and brackets.

Ziel der Erfindung ist die Schaffung von Spiralgehäuse aus Kunststoffmaterial, die sich auch in kleinen Stückzahlen noch kostengünstig herstellen lassen und dabei eine hohe Eigendämpfung haben, welche einen vereinfachten Einbau der Radialgebläse in Raumlüftungsvorrichtungen, insbesondere Schalldämmlüftern, ermöglicht.The aim of the invention is to create a spiral housing made of plastic material, which can still be produced inexpensively even in small quantities and which has a high internal damping, which enables a simplified installation of the radial blowers in room ventilation devices, in particular sound insulation fans.

Gelöst wird die gestellte Aufgabe erfindungsgemäß auf einfache Weise dadurch,
daß die Gehäuseteile von Vakuum-Tiefziehkörpern aus Plattenmaterial gebildet sind, deren jeder einen abgewinkelten Randbord oder Kragen aufweist,
daß die Umfangskontur des ersten Tiefziehkörpers um die Plattenmaterial-Dicke größer bemessen ist als die Umfangskontur des zweiten Tiefziehkörpers,
daß der Randbord bzw. Kragen des zweiten Tiefziehkörpers eine Höhe hat, die annähernd der lichten Baubreite des Spiralgehäuses entspricht,
daß von den Endkanten des Randbords oder Kragens am zweiten Tiefziehkörper längs der Umfangskontur eine größere Anzahl von Nasen nach außen absteht,
und daß der erste Tiefziehkörper in seinem Randbord oder Kragen nahe der Seitenwand Ausnehmungen enthält, in denen die Nasen am Randbord oder Kragen des zweiten Tiefziehkörpers verrastbar sind.According to the invention, the object is achieved in a simple manner by
that the housing parts are formed by vacuum deep-drawing bodies made of plate material, each of which has an angled rim or collar,
that the circumferential contour of the first deep-drawn body is dimensioned larger by the plate material thickness than the circumferential contour of the second deep-drawn body,
that the rim or collar of the second deep-drawn body has a height which corresponds approximately to the inside width of the volute casing,
that a larger number of lugs protrude outward from the end edges of the rim or collar on the second deep-drawing body along the circumferential contour,
and that the first deep-drawn body in its rim or collar near the side wall contains recesses in which the lugs on the rim or collar of the second deep-drawn body can be locked.

Formwerkzeuge, die eine Vakuumverformung von ebenem Plattenmaterial zu Tiefziehkörpern ermöglichen, lassen sich relativ einfach und kostengünstig, z.B. aus Holz, herstellen und dabei so auslegen, daß Seitenwand und Randbord oder Kragen der zum Spiralgehäuse zusammensetzbaren Tiefziehkörper eine optimal strömungsgünstige Gestalt erhalten. Die Endkanten des Randbordes oder Kragens am zweiten Tiefziehkörper lassen sich, beispielsweise mit Hilfe einer frei programmierbaren Fünf-Achsen-Fräsmaschine problemlos so nacharbeiten, daß an ihnen die nach außen abstehenden Nasen erhalten werden. Andererseits können auf die gleiche Art und Weise in den Randbord oder Kragen des ersten Tiefziehkörpers nahe der Seitenwand die Ausnehmungen mit Hilfe eines Fingerfräsers hergestellt werden.Forming tools that enable vacuum deformation of flat sheet material into deep-drawn bodies can be produced relatively easily and inexpensively, for example from wood, and be designed so that the side wall and The edge or collar of the deep-drawn body that can be assembled into the spiral housing is given an optimally streamlined shape. The end edges of the rim or collar on the second deep-drawn body can be reworked, for example with the help of a freely programmable five-axis milling machine, so that the outwardly projecting lugs are obtained on them. On the other hand, the recesses can be made in the same manner in the edge or collar of the first deep-drawn body near the side wall with the aid of a finger cutter.

Als zur Herstellung der Vakuum-Tiefziehkörper dienendes Plattenmaterial kann beispielsweise Polyvinylchlorid (PVC), Standardpolystyrol (PS) oder auch schlagfestes Polystyrol (SB) zum Einsatz gelangen, dessen Eigenelastizität gewährleistet, daß die Nasen am Randbord oder Kragen des zweiten Tiefziehkörpers eine selbsttätige und sichere Rastverbindung mit den Ausnehmungen im Randbord oder Kragen des ersten Tiefziehkörpers eingehen, wenn die beiden Tiefziehkörper achsparallel zu ihren Randborden oder Kragen zusammengesteckt werden.The sheet material used to manufacture the vacuum deep-drawn body can be, for example, polyvinyl chloride (PVC), standard polystyrene (PS) or impact-resistant polystyrene (SB), the inherent elasticity of which ensures that the lugs on the edge or collar of the second deep-drawn body provide an automatic and secure snap connection enter with the recesses in the rim or collar of the first thermoformed body when the two thermoformed bodies are plugged together axially parallel to their marginal rims or collar.

Bewährt hat es sich zur Schaffung eines erfindungsgemäßen Spiralgehäuses, wenn die Ansaugöffnung in die Seitenwand des zweiten Tiefziehkörpers als eingezogener Hals geformt ist und wenn der Randbord oder Kragen des ersten Tiefziehkörpers eine Höhe hat, die nur einem Bruchteil der Höhe des Randbordes oder Kragens am zweiten Tiefziehkörper entspricht.It has proven useful to create a spiral housing according to the invention if the suction opening in the side wall of the second deep-drawing body is shaped as a drawn-in neck and if the edge or collar of the first deep-drawing body has a height that is only a fraction of the height of the edge or collar on the second deep-drawing body corresponds.

Als wichtig hat es sich im Rahmen der Erfindung aber auch erwiesen, daß aus der Seitenwand des ersten Tiefziehkörpers ein flacher, kreisförmig begrenzter Napf herausgeformt ist, dessen Zentrum mit dem Zentrum des Spiralgehäuses Deckungslage hat, daß der Napfboden eine nach einwärts durchgewölbte Gestalt aufweist, und daß in der Umfangswand des Napfes bajonettartige Öffnungen vorgesehen sind, in denen der Stator eines Gebläsemotors über radiale Arme gegen die Federkraft des durchgewölbten Napfbodens - durch eine einfache, begrenzte Winkeldrehung relativ zum Tiefziehkörper - verriegelbar ist.It has also proven to be important in the context of the invention that a flat, circular bowl is formed from the side wall of the first deep-drawing body, the center of which has a cover position with the center of the volute casing, that the bowl bottom has an inwardly arched shape, and that bayonet-like openings are provided in the peripheral wall of the cup, in which the stator of a blower motor via radial arms against the spring force of the arched Cup base - can be locked by a simple, limited angular rotation relative to the deep-drawn body.

Die bajonettartigen Öffnungen in der Umfangswand des Napfes können ebenfalls auf einfache Art und Weise, beispielsweise mit Hilfe einer frei programmierbaren Fünf-Achsen-Fräsmaschine, hergestellt werden. Auf gleiche Art und Weise lassen sich dann aber auch mit den bajonettartigen Öffnungen in der Umfangswand des Napfes korrespondierende Durchlaßöffnungen für die radialen Arme am Stator des Gebläsemotors in der Seitenwand des ersten Tiefziehformteils vorsehen.The bayonet-like openings in the peripheral wall of the cup can also be produced in a simple manner, for example with the aid of a freely programmable five-axis milling machine. In the same way, however, corresponding passage openings for the radial arms on the stator of the blower motor in the side wall of the first deep-drawn molded part can also be provided with the bayonet-like openings in the peripheral wall of the cup.

In enger Nachbarschaft des Napfes läßt sich aus der Seitenwand des ersten Tiefziehkörpers ein Höcker oder Noppen so herausformen, daß er im Drehkreisbereich der radialen Arme des Gebläsemotor-Stators liegt und dabei mit einem der radialen Arme in dessen Eingriffslage als Drehlagensicherung in Wirkverbindung tritt.In the close vicinity of the bowl, a hump or knobs can be formed from the side wall of the first deep-drawn body in such a way that it lies in the rotating circle area of the radial arms of the blower motor stator and thereby comes into operative connection with one of the radial arms in its engagement position as a rotational position lock.

Der Zusammenbau eines solchermaßen ausgelegten Radialgebläses kann ohne Zuhilfenahme irgendwelcher Werkzeuge allein mit Hilfe der Bajonettkupplung sowie der Schnapp-Rastvorrichtungen und damit kostengünstig bewirkt werden.The assembly of a radial blower designed in this way can be effected without the aid of any tools and only with the help of the bayonet coupling and the snap-in locking devices, and thus inexpensively.

In der Zeichnung ist ein Ausführungsbeispiel des Gegenstandes der Erfindung dargestellt. Es zeigt

Fig. 1
im Schnitt ein Radialgebläse, das sich zur Benutzung in Vorrichtungen für die zentrale Raumlüftung eignet und ein Spiralgehäuse aus Kunststoffmaterial aufweist,
Fig. 2
in einen der Fig. 1 entsprechenden Schnitt durch einen ersten zum Bau des Spiralgehäuses dienenden Vakuum-Tiefziehkörper,
Fig. 3
einen Schnitt entlang der Linie III-III in Fig. 2, wobei auch die Schnittebene II - II durch den Vakuum-Tiefziehkörper nach Fig. 2 angedeutet ist,
Fig. 4
eine Teilansicht des Vakuum-Tiefziehkörpers nach Fig. 3 in Pfeilrichtung IV,
Fig. 5
eine Teilansicht des Vakuum-Tiefziehkörpers nach Fig. 3 in Pfeilrichtung V,
Fig. 6
eine Teilansicht des Vakuum-Tiefziehkörpers nach Fig. 3 in Pfeilrichtung VI,
Fig. 7
eine teilweise Schnittansicht des Vakuum-Tiefziehkörpers nach Fig. 3 in Pfeilrichtung VII,
Fig. 8
die in Fig. 2 mit VIII gekennzeichnete Einzelheit in etwas abgewandelter Ausbildung,
Fig. 9
eine Schnittansicht des zweiten Vakuum-Tiefziehkörpers zum Bau des Spiralgehäuses nach Fig. 1 und
Fig. 10
eine Draufsicht auf den Vakuum-Tiefziehkörper nach Fig. 9, wobei hierin auch die Schnittebene IX - IX des in Fig. 9 gezeigten Vakuum-Tiefziehkörpers zu sehen ist.
In the drawing, an embodiment of the object of the invention is shown. It shows
Fig. 1
on average a radial fan that is suitable for use in devices for central room ventilation and has a spiral housing made of plastic material,
Fig. 2
1 in a section corresponding to FIG. 1 through a first vacuum deep-drawing body used to build the spiral housing,
Fig. 3
3 shows a section along the line III-III in FIG. 2, the section plane II-II also being indicated by the vacuum deep-drawing body according to FIG. 2,
Fig. 4
3 shows a partial view of the vacuum deep-drawing body according to FIG. 3 in the direction of arrow IV,
Fig. 5
3 shows a partial view of the vacuum deep-drawing body according to FIG. 3 in the direction of arrow V,
Fig. 6
3 shows a partial view of the vacuum deep-drawing body according to FIG. 3 in the direction of arrow VI,
Fig. 7
3 shows a partial sectional view of the vacuum deep-drawing body according to FIG. 3 in the direction of arrow VII,
Fig. 8
the detail marked VIII in FIG. 2 in somewhat modified form,
Fig. 9
a sectional view of the second vacuum deep-drawing body for the construction of the spiral housing according to FIGS. 1 and
Fig. 10
9 shows a plan view of the vacuum deep-drawing body according to FIG. 9, wherein the sectional plane IX-IX of the vacuum deep-drawing body shown in FIG. 9 can also be seen here.

In Fig. 1 der Zeichnung ist im Querschnitt ein Radialgebläse 1 dargestellt, bei dem in einem sogenannten Spiralgehäuse 2 ein Gebläserad 3 untergebracht ist, das auf dem Rotor 4 eines Elektromotors 5 sitzt, welcher wiederum im Spiralgehäuse 2 befestigt ist. Das gesamte Radialgebläse 1 mit Spiralgehäuse 2, Gebläserad 3, Rotor 4 und Elektromotor 5 hat eine relativ kleine und flache Bauform, wie deutlich aus Fig. 1 der Zeichnung hervorgeht.In Fig. 1 of the drawing, a radial fan 1 is shown in cross section, in which a fan wheel 3 is accommodated in a so-called spiral housing 2, which sits on the rotor 4 of an electric motor 5, which in turn is fastened in the spiral housing 2. The entire radial fan 1 with spiral housing 2, impeller 3, rotor 4 and electric motor 5 has a relative small and flat design, as clearly shown in Fig. 1 of the drawing.

Das Spiralgehäuse 2 des Radialgebläses 1 ist aus zwei Gehäuseteilen 6 und 7 zusammengesetzt, die längs einer normal zur Gebläseachse 8-8 liegenden Ebene 9-9 miteinander verbunden sind.The spiral housing 2 of the radial fan 1 is composed of two housing parts 6 and 7, which are connected to one another along a plane 9-9 lying normal to the fan axis 8-8.

Beide Gehäuseteile 6 und 7 des Spiralgehäuses 2 sind als Vakuum-Tiefziehkörper aus einem Kunststoff-Plattenmaterial, beispielsweise aus Polyvynilchlorid (PVC) aus Standardpolystyrol (PS) oder auch schlagfestem Polystyrol (SB) hergestellt, indem das ebene Plattenmaterial zunächst durch Wärmeeinwirkung plastifiziert und dann durch Erzeugung eines Vakuums gegen die Konturen einer Holzform od. dgl. angelegt wird.Both housing parts 6 and 7 of the spiral housing 2 are produced as vacuum deep-drawn bodies made of a plastic plate material, for example made of polyvinyl chloride (PVC) from standard polystyrene (PS) or impact-resistant polystyrene (SB), by first plasticizing the flat plate material by the action of heat and then by Creation of a vacuum against the contours of a wooden mold or the like is created.

Das Gehäuseteil 6 wird dabei von einem ersten Vakuum-Tiefziehkörper gebildet, der eine geschlossene Seitenwand 10 und einen sich einstückig an deren Kontur anschließenden, abgewinkelten Randbord oder Kragen 11 aufweist. Darüber hinaus ist aus der ebenen Seitenwand 10 des Gehäuseteils 6 noch ein flacher, kreisförmig begrenzter Napf 12 herausgeformt, dessen Zentrum mit dem Zentrum des Spiralgehäuses 2 zusammenfällt und folglich auch mit der Gebläseachse 8-8 Deckungslage hat. Dabei weist der Napfboden 13 eine nach einwärts durchgewölbte Gestalt auf und in der Umfangswand 14 des Napfes 12 sind mehrere bajonettartige Öffnungen 15, 16, 17 in Umfangsrichtung gleichmäßig verteilt vorgesehen, die jeweils nur teilweise in den Fig. 4, 5 und 6 gezeigt werden.The housing part 6 is formed by a first vacuum deep-drawing body, which has a closed side wall 10 and an angled edge rim or collar 11 which adjoins the contour thereof. In addition, from the flat side wall 10 of the housing part 6 a flat, circular bowl 12 is formed, the center of which coincides with the center of the spiral housing 2 and consequently also has a covering position with the fan axis 8-8. The bowl bottom 13 has an inwardly arched shape and in the peripheral wall 14 of the bowl 12 several bayonet-like openings 15, 16, 17 are provided evenly distributed in the circumferential direction, which are only partially shown in FIGS. 4, 5 and 6.

Mit jeder dieser bajonettartigen Öffnungen 15, 16, 17 in der Umfangswand 14 des Napfes 12 korrespondiert dabei eine Durchlaßöffnung 19, 20, 21, die in der Seitenwand 10 des Gehäuseteils 6 in einer Art und Weise vorgesehen sind, welche aus Fig. 3 der Zeichnung ersichtlich ist.With each of these bayonet-like openings 15, 16, 17 in the peripheral wall 14 of the bowl 12 corresponds to a passage opening 19, 20, 21, which are provided in the side wall 10 of the housing part 6 in a manner which from Fig. 3 of the drawing can be seen.

Vom Stator 21 des Elektromotors 5 stehen jeweils etwa tangential bzw. radial drei Arme 22, 23, 24 ab, welche den gleichen Winkelabstand voneinander haben, wie die Durchlaßöffnungen 18, 19 und 20 in der Seitenwand 10 des Gehäuseteils 6. Zum Einbau der aus dem Gebläserad 3 sowie dem Elektromotor 5 mit Rotor 6 und Stator 21 bestehenden Einheit in das Gehäuseteil 6 ist es lediglich notwendig, zunächst die Arme 22, 23, 24 des Stators 21 mit den Durchlaßöffnungen 18, 19, 20 der Seitenwand 10 des Gehäuseteils 6 in Deckungslage zu bringen und dann in den Bereich der bajonettartigen Öffnungen 15, 16, 17 vorzuschieben. Dabei trifft der Stator 21 gegen den nach einwärts gewölbten Napfboden 13 und verformt diesen elastisch nach außen. Mit einer begrenzten Winkeldrehung des Stators 21 rücken dessen Arme 22, 23 und 24 in die zugehörigen Bajonettschlitze 15, 16, 17 an der Umfangswand 14 des Napfes 12 ein und werden dort unter der Rückstell-Federwirkung des Napfbodens 3 fixiert. Einer der Arme 22 bis 24, beispielsweise der Arm 22, wirkt mit einem aus der Seitenwand 10 des Gehäuseteils 6 herausgeformten Noppen oder Höcker 25 zusammen und wird in der durch den Bajonettschlitz 17 begrenzten Drehlage gegen unerwünschte Rückdrehung fixiert.Three arms 22, 23, 24, which are at the same angular distance, project from the stator 21 of the electric motor 5 approximately tangentially or radially have from each other, as the passage openings 18, 19 and 20 in the side wall 10 of the housing part 6. To install the unit consisting of the impeller 3 and the electric motor 5 with rotor 6 and stator 21 in the housing part 6, it is only necessary to first of all the arms 22, 23, 24 of the stator 21 with the passage openings 18, 19, 20 of the side wall 10 of the housing part 6 to bring them into cover position and then to advance them into the area of the bayonet-like openings 15, 16, 17. The stator 21 hits the inwardly curved cup base 13 and deforms it elastically outwards. With a limited angular rotation of the stator 21, its arms 22, 23 and 24 move into the associated bayonet slots 15, 16, 17 on the peripheral wall 14 of the bowl 12 and are fixed there under the return spring action of the bowl bottom 3. One of the arms 22 to 24, for example the arm 22, interacts with a knob or hump 25 formed out of the side wall 10 of the housing part 6 and is fixed in the rotational position limited by the bayonet slot 17 against undesired backward rotation.

Nahe der Seitenwand 10 sind im Randbord bzw. Kragen 11 des Gehäuseteils 6 schlitzartige Ausnehmungen 26 vorgesehen, und zwar in einer größeren, längs der Umfangskontur möglichst gleichmäßig verteilten Anzahl. Aus Fig. 3 geht dabei hervor, daß das Gehäuseteil 6 mit fünf Ausnehmungen 26 versehen ist. Diese Ausnehmungen 26 können dabei entweder, wie Fig. 2 zeigt, geradlinig und parallel zur Seitenwand 10 verlaufen. Sie können aber auch, wie in Fig. 8 angedeutet ist, mit bogenförmigen Verlauf vorgesehen werden.Slit-like recesses 26 are provided near the side wall 10 in the rim or collar 11 of the housing part 6, namely in a larger number, distributed as uniformly as possible along the circumferential contour. 3 that the housing part 6 is provided with five recesses 26. These recesses 26 can either, as shown in FIG. 2, run straight and parallel to the side wall 10. However, as indicated in FIG. 8, they can also be provided with an arcuate course.

Das Gehäuseteil 7 des Spiralgehäuses 7 wird ebenfalls als Vakuum-Tiefziehkörper aus Plattenmaterial hergestellt, und zwar auf gleiche Art und Weise, wie das Gehäuseteil 6. Es hat dabei eine im wesentliche ebene Seitenwand 27, in die als Öffnung ein Ansaughals 28 eingeformt ist, der in Fluchtlage mit der Gebläseachse 8-8 gelangt.The housing part 7 of the spiral housing 7 is also produced as a vacuum deep-drawing body made of plate material, in the same way as the housing part 6. It has an essentially flat side wall 27, into which an intake neck 28 is formed as an opening in alignment with the blower axis 8-8.

Die Umfangskontur des das Gehäuseteil 7 bildenden, zweiten Vakuum-Tiefziehkörpers ist auf die Umfangskontur des Gehäuseteils 6 abgestimmt.The peripheral contour of the second vacuum deep-drawing body forming the housing part 7 is matched to the peripheral contour of the housing part 6.

Dies derart, daß die Umfangskontur des vom ersten Vakuum-Tiefziehkörper gebildeten Gehäuseteils 6 um die Dicke des Plattenmaterials größer bemessen ist als die Umfangskontur des das Gehäuseteil 7 bildenden zweiten Vakuum-Tiefziehkörpers.This is such that the circumferential contour of the housing part 6 formed by the first vacuum deep-drawing body is dimensioned larger by the thickness of the plate material than the circumferential contour of the second vacuum deep-drawing body forming the housing part 7.

Auch das Gehäuseteil 7 hat dabei einen rechtwinklig zu seiner Seitenwand 27 gerichteten Randbord oder Kragen 29. Dieser weist jedoch eine Höhe auf, welche annähernd der lichten Baubreite 30 des Spiralgehäuses 2 entspricht, wie das deutlich aus Fig. 1 hervorgeht.The housing part 7 also has a rim or collar 29 directed at right angles to its side wall 27. However, this has a height which approximately corresponds to the inside width 30 of the spiral housing 2, as can be clearly seen from FIG. 1.

Von den Endkanten 31 des Randbordes bzw. Kragens 29 stehen längs der Umfangskontur eine größere Anzahl von Nasen 32 winklig nach außen ab (Fig. 1 und 9), deren Anordnung bzw. Verteilung auf die Anordnung bzw. Verteilung der Ausnehmungen 26 im Randbord 11 des Gehäuseteils 6 abgestimmt ist.From the end edges 31 of the rim or collar 29 a larger number of lugs 32 protrude outward along the circumferential contour (FIGS. 1 and 9), their arrangement or distribution over the arrangement or distribution of the recesses 26 in the rim 11 of the Housing part 6 is matched.

Beim axialen Aufstecken des Gehäuseteils 7 auf das Gehäuseteil 6 wird zunächst dessen Randbord 29 elastisch so nach einwärts verformt, daß die Kanten der Nasen 32 sich an den Innenflächen des Randbordes 11 des Gehäuseteils 6 abstützen. Dann werden die beiden Gehäuseteile 6 und 7 weiter so zusammengeschoben, daß die Nasen 32 den Bereich der Ausnehmungen 26 gelangen und so selbsttätig - nach Art einer Schnapp-Rastvorrichtung - mit diesen in Formschlußeingriff treten.When the housing part 7 is axially plugged onto the housing part 6, its edge 29 is first elastically deformed inwards in such a way that the edges of the lugs 32 are supported on the inner surfaces of the edge 11 of the housing 6. Then the two housing parts 6 and 7 are pushed together in such a way that the lugs 32 reach the area of the recesses 26 and thus automatically engage in a positive engagement with them - in the manner of a snap-in locking device.

Während die schlitzartigen Ausnehmungen 26 nach Fig. 2 verhältnismäßig eng ausgebildet werden müssen, wenn sie mit den Nasen 32 als spielarme Schnapp-Rastvorrichtung zusammenwirken sollen, ist es bei der bogenförmigen Ausgestaltung nach Fig. 8 möglich, den Ausnehmungen 26 eine größere Öffnungsweite zu geben. Trotzdem wirken sie jedoch mit den Nasen 32 als spielarme Schnapp-Rastvorrichtung zusammen, weil die letzteren an der Bogenkontur eine Dreipunktanlage erhalten.While the slot-like recesses 26 according to FIG. 2 have to be made relatively narrow if they are to interact with the lugs 32 as a low-play snap-locking device, it is possible in the arcuate configuration according to FIG. 8 to give the recesses 26 a larger opening width. Nevertheless, they cooperate with the lugs 32 as a low-play snap-in device, because the latter have a three-point system on the arc contour.

Alle Öffnungen und Durchlässe in dem als Vakkuum-Tiefziehkörper aus Plattenmaterial hergestellten Gehäuseteil 6 lassen sich durch spangebende Bearbeitung, beispielsweise mit Hilfe einer Fünf-Achsen-Fräsmaschine, problemlos herstellen, sofern diese frei programmierbar ist. Mit einer solchen Maschine können aber auch die Endkanten und die von diesen seitwärts abstehenden Nasen 32 an dem ebenfalls als Vakuum-Tiefziehkörper gefertigten Gehäuseteil 7 bearbeitet werden.All openings and passages in the housing part 6, which is produced as a vacuum deep-drawing body from plate material, can be machined Machining, for example with the help of a five-axis milling machine, can be easily carried out, provided it is freely programmable. With such a machine, however, the end edges and the lugs 32 projecting sideways from them can also be machined on the housing part 7, which is also manufactured as a vacuum deep-drawn body.

Die Spiralgehäuse 2 der vorstehend beschriebenen Radialgebläse 1 lassen sich mit relativ kleinen Stückzahlen noch kostengünstig fertigen und haben dabei zugleich den Vorteil einer relativ hohen Eigendämpfung, weil sie durch Vakuumverformung aus Kunststoff-Plattenmaterial gebildet sind.The spiral housing 2 of the radial blowers 1 described above can still be manufactured inexpensively with relatively small quantities and at the same time have the advantage of a relatively high internal damping because they are formed from plastic sheet material by vacuum deformation.

Claims (5)

Spiralgehäuse aus Kunststoffmaterial für Radialgebläse zur dezentralen Raumlüftung, das eine geschlossene Seitenwand, eine mit einer Ansaugöffnung versehene Seitenwand und eine zwischen diesen angeordnete, spiralig verlaufende Umfangswand aufweist, die mit einer Ausblasöffnung versehen ist, bestehend aus zwei längs einer normal zur Gebläseachse liegenden Ebene miteinander verbundenen Gehäuseteilen,
dadurch gekennzeichnet,
daß die Gehäuseteile (6 und 7) von Vakuum-Tiefziehkörpern aus Plattenmaterial gebildet sind, deren jeder einen abgewinkelten Randbord oder Kragen (11 bzw. 29) aufweist,
daß die Umfangskontur des ersten Tiefziehkörpers (Gehäuseteil 6) um die Plattenmaterial-Dicke größer bemessen ist als die Umfangskontur des zweiten Tiefziehkörpers (Gehäuseteil 7),
daß der Randbord bzw. Kragen (29) des zweiten Tiefziehkörpers (Gehäuseteil 7) eine Höhe hat, die annähernd der lichten Baubreite (30) des Spiralgehäuses (2) entspricht,
daß von den Endkanten (31) des Randbordes oder Kragens (29) am zweiten Tiefziehkörper (Gehäuseteil 7) längs der Umfangskontur eine größere Anzahl von Nasen (32) nach außen absteht,
und daß der erste Tiefziehkörper (Gehäuseteil 6) in seinem Randbord oder Kragen (11) nahe der Seitenwand (10) Ausnehmungen (26) enthält,
in denen die Nasen (32) am Randbord oder Kragen (29) des zweiten Tiefziehkörpers (Gehäuseteil 7) verrastbar sind.Spiral housing made of plastic material for radial fans for decentralized room ventilation, which has a closed side wall, a side wall provided with a suction opening and a spiral peripheral wall arranged between them, which is provided with a blow-out opening, consisting of two interconnected along a plane normal to the fan axis Housing parts,
characterized,
that the housing parts (6 and 7) are formed by vacuum deep-drawing bodies made of plate material, each of which has an angled rim or collar (11 or 29),
that the circumferential contour of the first deep-drawn body (housing part 6) is dimensioned larger by the plate material thickness than the circumferential contour of the second deep-drawn body (housing part 7),
that the rim or collar (29) of the second deep-drawn body (housing part 7) has a height which approximately corresponds to the inside width (30) of the spiral housing (2),
that a larger number of lugs (32) protrude outward from the end edges (31) of the rim or collar (29) on the second deep-drawing body (housing part 7) along the circumferential contour,
and that the first deep-drawn body (housing part 6) contains recesses (26) in its rim or collar (11) near the side wall (10),
in which the lugs (32) on the rim or collar (29) of the second deep-drawn body (housing part 7) can be locked. Spiralgehäuse nach Anspruch 1,
dadurch gekennzeichnet,
daß die Ansaugöffnung (28) in die Seitenwand (27) des zweiten Tiefziehkörpers (Gehäuseteil 7) als eingezogener Hals eingeformt ist.Spiral casing according to claim 1,
characterized,
that the suction opening (28) in the side wall (27) of the second deep-drawn body (housing part 7) is formed as a neck. Spiralgehäuse nach einem der Ansprüche 1 und 2,
dadurch gekennzeichnet,
daß der Randbord oder Kragen (11) des ersten Tiefziehkörpers (Gehäuseteil 6) eine Höhe hat, die nur einem Bruchteil der Höhe des Randbords oder Kragens (29) am zweiten Tiefziehkörper (Gehäuseteil 7) entspricht.Spiral casing according to one of claims 1 and 2,
characterized,
that the rim or collar (11) of the first deep-drawing body (housing part 6) has a height which corresponds to only a fraction of the height of the rim or collar (29) on the second deep-drawing body (housing part 7). Spiralgehäuse nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß aus der Seitenwand (10) des ersten Tiefziehkörpers (Gehäuseteil 6) ein flacher, kreisförmig begrenzter Napf (12) herausgeformt ist, dessen Zentrum mit dem Zentrum des Spiralgehäuses Deckungslage hat, daß der Napfboden (13) eine nach einwärts durchgewölbte Gestalt aufweist und daß in der Umfangswand (14) des Napfes (12) bajonettartige Öffnungen (15, 16, 17) vorgesehen sind, in denen der Stator (21) eines Gebläsemotors (5) über radiale Arme (22, 23, 24) gegen die Federkraft des durchgewölbten Napfbodens (13) verriegelbar ist.Spiral casing according to one of claims 1 to 3,
characterized,
that from the side wall (10) of the first deep-drawn body (housing part 6) a flat, circular bowl (12) is formed, the center of which has a cover position with the center of the volute casing, that the bowl bottom (13) has an inwardly curved shape and that Bayonet-like openings (15, 16, 17) are provided in the peripheral wall (14) of the cup (12), in which the stator (21) of a blower motor (5) via radial arms (22, 23, 24) against the spring force of the arched Cup bottom (13) can be locked. Spiralgehäuse nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß mit den bajonettartigen Öffnungen (15, 16, 17) in der Umfangswand (14) des Napfes (12) korrespondierende Durchlaßöffnungen (18, 19, 20) für die radialen Arme (22, 23, 24) des Gebläsemotor-Stators (21) in der Seitenwand (10) des ersten Tiefziehformteils (Gehäuseteil 6) vorgesehen sind.Spiral casing according to one of claims 1 to 4,
characterized,
that with the bayonet-like openings (15, 16, 17) in the peripheral wall (14) of the cup (12) corresponding passage openings (18, 19, 20) for the radial arms (22, 23, 24) of the blower motor stator (21) are provided in the side wall (10) of the first deep-drawn molded part (housing part 6).
EP93111713A 1992-10-23 1993-07-22 Spiral housing for radial blower Expired - Lifetime EP0593860B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9214308U DE9214308U1 (en) 1992-10-23 1992-10-23
DE9214308U 1992-10-23

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EP0593860A1 true EP0593860A1 (en) 1994-04-27
EP0593860B1 EP0593860B1 (en) 1996-02-07

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ID=6885130

Family Applications (1)

Application Number Title Priority Date Filing Date
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EP (1) EP0593860B1 (en)
AT (1) ATE134026T1 (en)
DE (2) DE9214308U1 (en)

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WO2003038285A1 (en) * 2001-11-02 2003-05-08 Valeo Climatisation Motor fan system
FR2831931A1 (en) * 2001-11-02 2003-05-09 Valeo Climatisation Motorized blower, for motor vehicle heater, has scroll casing with opening for motor housing directly supporting control module
CN109083853A (en) * 2018-10-24 2018-12-25 奥克斯空调股份有限公司 A kind of blower fan structure and air conditioner

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DE4321924C1 (en) * 1993-07-01 1994-06-23 Siegenia Frank Kg Radial-flow fan production method
DE102005059636A1 (en) * 2005-12-14 2007-06-21 Pfeiffer Vacuum Gmbh vacuum pump
DE102019129588A1 (en) * 2019-11-04 2021-05-06 Miele & Cie. Kg A blower comprising a housing and a motor

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US2931562A (en) * 1958-01-20 1960-04-05 Brown & Bigelow Desk air fan
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GB2002182A (en) * 1977-07-30 1979-02-14 Matsushita Electric Works Ltd Device for fitting electric motors and for feeding power to the same
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WO2003038285A1 (en) * 2001-11-02 2003-05-08 Valeo Climatisation Motor fan system
FR2831931A1 (en) * 2001-11-02 2003-05-09 Valeo Climatisation Motorized blower, for motor vehicle heater, has scroll casing with opening for motor housing directly supporting control module
CN109083853A (en) * 2018-10-24 2018-12-25 奥克斯空调股份有限公司 A kind of blower fan structure and air conditioner

Also Published As

Publication number Publication date
EP0593860B1 (en) 1996-02-07
ATE134026T1 (en) 1996-02-15
DE9214308U1 (en) 1993-01-07
DE59301590D1 (en) 1996-03-21

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