US20140037444A1

US20140037444A1 - Ventilator for gaseous media

Info

Publication number: US20140037444A1
Application number: US13/944,133
Authority: US
Inventors: Gerhard RUCK
Original assignee: Ruck Ventilatoren GmbH
Current assignee: Ruck Ventilatoren GmbH
Priority date: 2012-07-17
Filing date: 2013-07-17
Publication date: 2014-02-06
Also published as: US20140023491A1; DE102013107579B4; DE102013107579A1; DE102013107580A1

Abstract

The invention relates to a fan for gaseous media, having an impeller (26), which has a support disc (33) with several blades (36) arranged thereon, having a covering disc (40) or an inlet nozzle (41), which is opposite the blades (36) arranged on the support disc (33), having a flow channel (25) formed by a housing (12), having a receiving apparatus (60) arranged in the flow channel (25), which has a motor holder (61), on which a motor (50) is fastened, which drives the support disc (33) rotatably via a driveshaft (51), wherein at least one holding apparatus (54) is provided, which is fixed in addition to and separate from the motor holder (61) of the motor (50).

Description

The invention relates to a fan for gaseous media according to the preamble of claim 1.
A fan for gaseous media is known from EP 1 544 472 A2, which is designed, for example, as a duct fan. This comprises a diagonal impeller, which comprises a support disc with several blades arranged thereon. A covering disc is provided to be allocated to the blades, which is connected to the blade ends, for example. A flow channel is formed between a housing and a receiving apparatus for a motor. The motor is fastened in the receiving apparatus, which motor rotatably drives the support disc via a driveshaft. In this embodiment, the motor is fastened to the receiving apparatus opposite the driveshaft, such that the front region of the driveshaft of the motor is fastened with suspension.
Moreover, a fan for gaseous media arises from DE 40 20 236 A1. The gaseous medium is supplied to a flow channel via an impeller, which extends between a housing and a receiving apparatus for the motor. In the receiving apparatus, the motor is fastened frontally to the receiving apparatus in the region of a driveshaft for driving the impeller. The opposite end of the motor or the base of the motor is provided suspending in the receiving apparatus.
During the transportation of such fans, increased loads can, due to the suspended arrangement, occur on the receiving points of the motor for the receiving apparatus. Furthermore, according to the purpose of use, different temperatures can prevail, which can lead to a bend in the axis of rotation with respect to the predetermined axis of rotation for the suspended receiver.
The object of the invention is to provide a fan for gaseous media, wherein the motor is provided durably in a receiving apparatus in a constant position and is protected from damage during transportation.
This object is solved by a fan for gaseous media having a receiving apparatus, which has at least one holding apparatus that fixes the motor to the receiving apparatus in addition to, and separately from, the motor holder. With such a holding apparatus, it is enabled that the motor is no longer provided suspended in the receiving apparatus, but rather is positioned with respect to the receiving apparatus on two fastening points or fastening sections. By creating two bearing positions for the motor in the receiving apparatus, the provided configuration of the axis of rotation of the driveshaft, which bears the support disc with blades arranged thereon, is maintained independently of the installation position and the prevailing temperatures.
According to a preferred embodiment of the invention, the holding apparatus has at least two fastening sections. The holding apparatus can be fixed by the fastening sections to both the motor on the one hand and the receiving apparatus on the other, in particularly releasably fixed, such that a simple mounting and demounting or a disassembly of the motor from the receiving apparatus is possible.
Furthermore, a flexible damping element can be provided, which has the advantage that a vibration-free or low-vibration mounting of the motor in the receiving device is thereby enabled. This rotation damper does not only protect against impact loads during transportation, but also serves for acoustic decoupling during the operation of the fan, such that potential vibrations of the motor are not transferred to the receiving device and thus to the housing of the fan. Advantageously, the fastening section can also be designed as a damping element.
According to a first embodiment of the invention, provision is made for the receiving device to have a pot-shaped basic body having an interior that is open on one side, on the base or side wall of which the motor holder is provided for fastening the motor, and for the holding apparatus to engage with the motor and basic body at a distance from the motor holder. For example, the motor holder can be provided on the floor of the basic body. This basic body can be configured away from the support disc with the receiving space that is open on one side. Also, the base of the receiving apparatus can be allocated to the support disc, such that the interior that is open on one side is open on the outflow side. Furthermore, provision can alternatively be made for the motor holder to be provided on the side walls of the pot-shaped basic body of the receiving apparatus, such that the motor is fixed to the basic body over its outer periphery. In these variants, the holding apparatus can additionally engage with the motor and the basic body of the receiving apparatus separately from the motor holder and thus enable a stable two-point mounting of the motor.
Provision is preferably made for the holding apparatus to be arranged on an insertion opening of the basic body in the receiving apparatus and preferably to engage with a front section of the motor. This enables a simple mounting of the holding apparatus after the motor has been positioned with respect to the motor holder. Additionally, it can thus also be enabled that the pot-shaped basic body, for example, is completely closed by the holding apparatus.
Provision is preferably made for the holding apparatus to be designed cap-shaped, collar-shaped, washer-shaped or disc-shaped or to consist of one or more holding tabs. Depending on the structural size and the application, as well as further functional features, the holding apparatus can be adjusted accordingly. As long as a completely closed receiving space is to be produced, the holding apparatus is preferably designed cap-shaped, such that the insertion opening can be closed. If, for example, a mounting of the motor with the side wall is desired, a collar-shaped holding apparatus can be provided. Likewise, holding tabs can also be provided, wherein these are preferably applied frontally to the basic body and the motor.
According to a further preferred embodiment of the invention, provision is made for the motor holder to be provided on the base side of the receiving apparatus and for the at least one holding apparatus to be arranged between a side wall and the housing section of the motor. There thus arise further alternative embodiments for the secure holding and mounting of the motor.
Advantageously, the holding apparatus can consist of at least two strut-like projections, which are arranged on the side wall and extend at least to the centre of the interior space and laterally support the motor. Here, two—preferably three—strut-like projections are preferably provided, such that the motor therein can also be received in a centred manner. Thus, a first pre-fixing of the motor can be provided after the motor has been inserted into the basic body, wherein the mounting of the motor on the motor holder is simplified.
The strut-like projections of the holding apparatus preferably extend at least in sections along the side wall. This arrangement also has the advantage that, for example, motors with different lengths and the same outer periphery can be applied.
Instead of the strut-like projections, provision can alternatively be made, for example, for the flexible damping element with two fastening sections to be designed as a spring element. Furthermore, an elastic rubber buffer can alternatively be provided. A membrane element can also be applied.
A further preferred embodiment provides that the holding device is designed as a cover that completely or partially closes the insertion opening of the receiving device.
A further preferred embodiment of the invention provides that a stiffening element is provided on or in the base of the receiving apparatus, which element activates the motor holder. Thus, the first bearing position of the motor can be reinforced with respect to the receiving apparatus.
This stiffening element is preferably designed to be star-shaped or cross-shaped and has fastening points on the outer ends of the finger-shaped sections. Thus a stiff yet weight-optimised stiffening element is formed.

The invention and further advantageous embodiments and developments of the same are described and illustrated in greater detail below by means of the examples depicted in the drawings. The features to be gleaned from the description and the drawings can be applied according to the invention individually for themselves or in any combination. The following are shown:

FIG. 1 a schematic sectional representation of a fan according to the invention,

FIG. 2 a schematic sectional representation of an alternative embodiment to FIG. 1,

FIG. 3 a further schematic sectional representation of an alternative embodiment to FIG. 1,

FIGS. 4 a to 4 f schematic sectional representations of alternative embodiments of a holding apparatus to receive a motor,

FIG. 5 a schematic sectional representation of an alternative embodiment to FIG. 1,

FIG. 6 a schematic sectional representation of a further alternative embodiment to FIG. 5,

FIG. 7 a schematic sectional representation of a further alternative embodiment to FIG. 5,

FIG. 8 a schematic sectional representation of a further alternative embodiment to FIG. 5,

FIG. 9 a schematic view onto a motor holder of a receiving apparatus for the motor according to the embodiment in FIG. 1,

FIG. 10 a schematic front view onto an alternative embodiment of the fan, and

FIG. 11 a schematic sectional view along the line X-X according to FIG. 10.

A schematic sectional representation of a fan 11 for gaseous media is depicted in FIG. 1, which is designed as a diagonal fan, for example. The fan 11 has an outer housing section 12, in particular a housing casing, which encloses a circular cylindrical straight cylinder interior. A respective right and left flange 17, 18 are firmly applied externally to the housing section 12 at its respective left and right front wall 14, 15. A respective schematically depicted pipeline 21, 22 can be connected to both ends of the housing section 12, and thus to the diagonal fan 11, by means of these flanges 17, 18. The diagonal fan 11 can thus be installed between these pipelines 21, 22. An external diameter of the pipelines 21, 22 can also correspond to the external diameter of the housing section 12. The pipelines 21, 22 can also possess a respective diameter that deviates from the diameter of the housing section 12 and can be connected to the diagonal fan 11 via a corresponding pipe adaptor.
The diagonal fan 11 possesses a diagonal impeller 26, which is allocated to a suction unit 29 on the inflow side. A guidance device 28 and, connected to this, a diffuser 30, is formed within the diagonal fan 11 on the outflow side of the diagonal impeller 26. The diffuser 30 is formed by a blow-out unit 31. The gaseous flow medium pushed through the diagonal ventilator 11 by means of the diagonal impeller 26 flows around a central interior space of the diagonal fan 11, which is delineated inwardly by a support disc 33 of the diagonal impeller 26 and an intermediate casing 34 connected to the support disc 33 for optimal flow. The support disc 33 bends on the outflow side in the axial direction, such that it abuts upon the intermediate casing 34 aligned in the axial direction for optimal flow, which is part of a basic body 59 of a receiving apparatus 60. The flow medium thus flows radially outwards past the support disc 33 and the intermediate casing 34.
The diagonal impeller 26 possesses peripherally distributed blades 36, which are fastened on one side to the support disc 33. Opposite this, free blade ends 37 of the blades 36 point towards a peripheral surface 39 of a covering disc 40, which is fastened to the housing section 12. The blades are, for example, designed to be profiled in its cross-section and three-dimensionally twisted. The inflow-side entry edges of the blades 36 are configured approximately perpendicular to the flow direction of the flowing flow medium and have smoothing applied. The outflow-side exit edge of the blades 36 is also configured approximately perpendicular to the outflow-side, departing diagonal flow. The covering disc 40 can form a piece of an inlet nozzle 41. Alternatively, the inlet nozzle 41 can be fastened to the housing section 12 and encompass or bear the covering disc 40, such that a flow-optimal transition from the suction unit 29 to the guidance device 28 is provided. As long as the inlet nozzle 41 and the covering disc 40 are each designed separately, there arises an annular gap located therebetween, which can be sealed by a sealing element. Alternatively, such an annular gap can also be designed as a flow labyrinth. Furthermore, provision can alternatively be made for the covering disc 40 to be designed as a rotating covering disc, which is fitted onto the external free blade ends of the blades 36.
The flow leaving the diagonal impeller 26 then flows through the region of the guidance device 28. In this section of the diagonal fan 11, stationary guidance blades 45 are arranged with peripheral distribution between the intermediate casing 34 and the housing section 12. Due to the guidance blades 45, the flow leaving in the helical, diagonal direction of the diagonal impeller 26 is redirected into an axial flow direction. As well as the blades 36 of the diagonal impeller 26, the guidance blades 45 are, in the present exemplary case, also designed to be profiled and three-dimensionally twisted. Alternatively, for the blades 36 and/or the guidance blades 45, the profiling could also be dispensed with.
In the interior space 47 of the basic body 59 of the receiving apparatus 60, which can also form one part of the intermediate casing 34, there is located a motor 50, which drives the diagonal impeller 26 by means of a driveshaft 51. The motor 50 is advantageously fastened to a motor holder 61, which is preferably provided on the base 64 of the receiving apparatus 60, such as arises, for example, from FIG. 9.
On the outflow side of the guidance device 28, the diffuser 30 is designed to be connected to the guidance device 28. The diffuser 30 is constructively implemented by a flow annular channel, which increases on the outflow side, between a holding apparatus 54, which, for example, completely or partially closes the receiving apparatus 60, and a housing wall 56 of the blow-out unit 31. The holding apparatus 54 is, for example, fastened to the intermediate casing 34 by means of several screws (not shown here) and preferably closes off the interior space 47 on the outflow side.
In this embodiment according to FIG. 1, the basic body 59 of the receiving apparatus 60 is designed to be pot-shaped, wherein an insertion opening 62 is formed on the interior space 47 that is open on one side, which points in the outflow direction. The motor 50 is, for example, fastened to the base 64 of the receiving apparatus 60 by a screw connection, wherein the base 64 has a push-through opening for the driveshaft 51. In this exemplary embodiment, provision is made for the base 64 and a side wall connected thereto to have its external periphery adapted to a housing contour of the motor 50, such that this is received by a collar section of the basic body 59. The fastening of the motor 50 to the motor holder 61 forms a first bearing position of the motor in the receiving apparatus 60, wherein this first bearing position is designed on the inflow side.
For the improved mounting of the motor 50 and for transportation security and vibration damping, the holding apparatus 54 is provided at a distance from the first bearing position, which forms, on the outflow side, a second bearing position for the motor housing 52 of the motor 50. This holding apparatus 54 is, for example, designed as a cap or plate and closes off the interior space 47 of the receiving apparatus 60.
The holding apparatus 54 comprises two fastening sections 67, with which the holding apparatus 54 is releasably fastened to the basic body 59 of the receiving apparatus 60, for example by means of a screw connection. Furthermore, the holding apparatus 54 comprises a damping element 68, which enables a decoupling between the motor 50 and the basic body 59 of the receiving apparatus. The fastening sections 67 can be provided on a holding element 72, which receives the damping element 68 or is itself formed as a damping element 68.
The receiving apparatus 60 has the advantage that this is formed to receive several motors 50 of different sizes. For example, motors 50 with a small housing (depicted with a dashed line) can also be inserted into this receiving apparatus 60 and can be connected to the motor holder 61. The holding apparatus 54 furthermore enables the formation of the second bearing position for fixing, transportation security and decoupling of the motor to the receiving apparatus 60 as well as to the housing 12. A form of modular construction is also enabled by such an arrangement.
Provision can alternatively be made for the base 64 of the basic body 59 of the receiving apparatus 60 to be arranged on the outflow side, such that the holding apparatus 54 is provided on the inflow side for the formation of a second bearing position and, adjacent to the driveshaft 51, engages with a front side or a front region of the motor 50 on its motor housing 52.
A schematic view of one embodiment of the holding apparatus 54 is depicted in FIG. 2. This holding apparatus 54 can, for example, be designed as a spring element, which has a dual bending angle and is formed with two fastening sections 67, with which the holding apparatus 54 is fastened to the basic body 59 of the receiving apparatus 60 and, for example, to a front side of the motor 50. The damping element 68 is formed by the holding element 72 that is designed as a spring element, i.e. a component can be provided that comprises both the damping function and the corresponding fastening function. Alternatively, the fastening sections 67 can also be formed by separate components that can be attached to the holding element 72 or the damping element 68.
A further alternative to FIG. 2 is depicted in FIG. 3. For example, the holding apparatus 54 comprises an annular or screw-like segment, on which two fastening element 67 are provided, wherein the fastening section 67 directly adjoins a front side of the basic body 59 of the receiving apparatus 60 and a second fastening section 67 simultaneously receives the damping element 68 in order to connect this to a front side of the basic body 59.
A schematically enlarged sectional view of a holding apparatus 54 according to FIG. 3 is, for example, depicted in FIG. 4 a. A fastening section 67 and, at the same time, the damping element 68 of the holding apparatus 54, are fixed to the front side of the motor housing 52 via a releasably connecting element 71, such as a screw. The holding element 72 of the holding apparatus 54 is designed, for example, as a metal plate or metal strip. The fastening section 67 simultaneously receives the damping element 68, such that this is fixed firmly to the holding apparatus 54. For example, a rubber spout with a sleeve is provided, into which the connecting element 71 is inserted. Thus, a vibration decoupling between the motor 50 and the basic body 59 can be enabled.
An alternative embodiment to FIG. 4 a is depicted in FIG. 4 b. In this embodiment, the damping element 68 is designed in two parts and the fastening section 27 is offset in the region for receiving the connecting element 71. This enables the damping element 68 to be applied subsequently to the fastening section 67, for example, and thereafter to be able to be connected to the motor 50.
A further alternative embodiment to FIGS. 4 a and 4 b is depicted in FIG. 4 c. In this embodiment, provision is made for the holding element 72 to be provided as a metal plate, metal strip or metal covering and for a through-hole to form the fastening section 67 and by means of the connecting element 72, which is positioned as a separate damping element 68 from the fastening section 67, as soon as the connecting element 71 engages with the motor housing 51. The damping element 68 is, for example, designed as a rubber buffer.
An alternative embodiment of the holding apparatus 54 is depicted in FIG. 4 d. Here, this is a membrane suspension or a membrane element, wherein the damping element 68 is clamped between two holding elements 72. A certain bendability and elastic mounting is provided by the non-continuous holding elements that are arranged on both sides of the damping element 68.
A further alternative embodiment of the holding apparatus 54 is depicted in FIG. 4 e. This shows a sandwich construction, wherein the damping element 68 is arranged between holding elements 72. Depending on the thickness of the individual layers, the flexibility, vibration absorption and bendability can be adjusted.
A further alternative embodiment of the holding apparatus 54 is depicted in FIG. 4 f. Here, two holding elements 72 are used as perforated plates, which are connected to each other by interconnection of the damping elements 68.
The holding apparatus 54 can be designed as a covering, such that these only have one opening for the driveshaft 51 when there is an inflow-side arrangement, but still incidentally cover the insertion opening 62 of the receiving apparatus 60. Should the insertion of the holding apparatus 54 take place when there is an insertion opening 62 of the receiving apparatus 60 arranged on the outflow side, the holding apparatus 54 can be designed as a completely closed cover. Alternatively, the holding apparatus 54 can be formed from an annular element having several tabs. Furthermore, the holding apparatus 54 can be formed from two or more tabs, which form a second bearing position and fix the motor housing 52 to the basic body 59 of the receiving apparatus 60.
An alternative embodiment to FIG. 1 is depicted in FIG. 5. This embodiment deviates from the one in FIG. 1 in that the receipt of the motor 50 with respect to the first bearing position is not provided by a motor holder 61 in the base 64 of the basic body 59 and engage with a front side of the motor 50, but rather the motor holder 61 engages with an external peripheral surface of the motor housing 52. In this case, the motor holder 61 can be designed, for example, as a strut, which is in contact with the side wall that also forms the intermediate casing 34. The second bearing position can then in turn be formed by the holding apparatus 54, which engages on the outflow side with the receiving apparatus 60. The further embodiment variants and fastening options of the holding apparatus 54 in the embodiment according to FIG. 5 correspond to the embodiments described above and can be selectively applied and combined with one another.
Further alternative arrangements for receiving the motor 50 in the receiving apparatus 60 are depicted in FIGS. 6 to 8. The motor 50 is fixed to a motor holder 61 with respect to the receiving apparatus 60, which motor holder is provided in the base 64 of the receiving apparatus 16. The base 64 can thus be designed on the outflow or inflow side. The holding apparatus 54 is, in the embodiments according to
FIGS. 6 to 8, not arranged on a front side of the basic body 59 of the receiving apparatus 16, but rather engages with an interior side wall 65 of the basic body 59 of the receiving apparatus 60.
In the exemplary embodiment according to FIG. 6, provision is made for the holding apparatus 54 to consist of strut-like projections 73, wherein preferably at least two, in particular three or more, projections 73 are formed, such that an interior space 47 adjusted to the external diameter of the motor housing 52 is formed by the front faces of the projections 73. Thus, a simple and secure mounting of the motor 50 can be provided, such that a second bearing position is formed without additional connecting elements 71. This embodiment can, moreover, be produced cost-effectively as an injection-moulded part, such that the projections 73 of the holding apparatus 54 are produced at the same time as the receiving apparatus 60. For vibration decoupling of the motor 50, provision can be made for the projections 73 to be produced from a material that is more flexible than that of the receiving apparatus 60. Likewise, the front sides of the projections 73, which point towards the motor housing 52, can be equipped with a damping element 68. This can subsequently be applied or, for example, be moulded at the same time in a dual or multi-component injection-moulding process.
The embodiment according to FIG. 7 has alternative holding apparatus 54. For example, these can be designed as a pressure spring element 75 or as a rubber buffer 76. In this case, only one kind of holding apparatus 54 can be used, or even a combination thereof.
A further alternative embodiment of the second bearing position is depicted in FIG. 8. The holding apparatus 54 can, for example, be designed as a splitter 78, with which the motor housing 52 is supported.
In FIG. 9, the motor holder 61 is depicted exemplarily in the base 64 of the basic body 59 of the receiving apparatus 60. This motor holder 61 can be designed as a stiffening element. Here, this can be a separate component that is connected to the base 64. It is preferable for the stiffening element to be designed as an insertion, such that, during the production of the receiving apparatus 60, the motor holder 61 is injected or at least moulded into the base 64. The motor holder can be designed as a sheet component. Likewise, the motor holder 61 can be designed as a fibreglass-reinforced plastic element. It is preferred for the motor holder 61 to have a cross-shaped or star-shaped contour, on which fastening points 79 of the frontal receiver of the motor 50 are provided. If the motor holder 61 is being used as per FIG. 1, the motor holder will have a central opening 81 leading to the driveshaft 51.
With the embodiment of a further bearing position, in addition to the first bearing position, by means of the at least one holding apparatus 54 it is enabled that the motor 50 can be received in the receiving apparatus 60 with vibration decoupling. At the same time, a durable alignment of the axis of rotation of the driveshaft 51 is enabled independent of temperature influences.
A schematic side view of an alternative embodiment of a fan 11 in FIG. 1 is depicted in FIG. 10. FIG. 11 shows a schematic sectional view along the line X-X in FIG. 10. This fan 11 is, for example, designed as a radial fan and has an external housing section 12, in particular a housing casing, which comprises, for example, a square cross-section and dimensions that correspond to the typical dimensions of an air duct. A suction unit 29 comprises a frontally arranged inlet nozzle 41, which comprises a central opening that leads to the impeller 26, such that an axial inflow and a radial outflow is produced. The housing section 12 comprises an upstream flange 17 and a downstream flange 18, wherein the downstream flange 18 is provided at right angles to the upstream flange 17 and, for a housing section 12 that is cuboidal, for example, can be formed on one of the four side wall sections arranged at right angles to the front side.
The impeller 26 is received by a driveshaft 51, which is driven by a motor 50. The motor 50 is received and held by a receiving device 60, on which the motor 50 is arranged frontally—i.e. in the region of the received driveshaft 51. The receiving device 60 is a part of guidance surfaces 85, which extend from the motor holder 61 of the receiving apparatus 60 to a side wall of the housing section 12, whereby the motor 50 is encapsulated by the flow channel 25.
A holding apparatus 54 is provided on a rear side wall of the housing section 12, which is designed to be tab-shaped, for example, and which fixes the end of the motor housing 52 opposite the driveshaft 51 to the adjacent front wall. Thus, this holding apparatus 54 can have both fastening sections and/or at least one flexible damping element. The aforementioned embodiments for the formation of a second bearing position of the motor 50 with respect to the housing 12 can also be applied here.
The fan depicted in FIGS. 10 and 11 enables secure transportation with the additional holding apparatus 54. At the same time, an increased damping effect can thus be produced to reduce noise. Moreover, this arrangement enables a modular construction, since, for example, different housing sizes of the motor 50 within the guidance struts 85 can be fastened to the base 64 of the receiving apparatus 60 and the holding apparatus 54 can be adapted accordingly.

Claims

1. Fan for gaseous media,

having an impeller (26), which has a support disc (33) with several blades (36) arranged thereon,

having a covering disc (40) or an inlet nozzle (41), which is opposite the blades (36) arranged on the support disc (33),

having a flow channel (25) formed by a housing (12),

having a receiving apparatus (60) arranged in the flow channel (25), which has a motor holder (61), on which a motor (50) is fastened, which drives the support disc (33) rotatably via a driveshaft (51),

characterised in that at least one holding apparatus (54) is provided, which is fixed in addition to and separate from the motor holder (61) of the motor (50).

2. Fan according to claim 1, characterised in that the holding apparatus (54) has at least two fastening sections (67).

3. Fan according to claim 1, characterised in that the holding apparatus (54) has at least one flexible damping element (68) or in that at least one fastening section (67) is designed as the damping element (68).

4. Fan according to claim 1, characterised in that the receiving apparatus (60) has a pot-shaped basic body (59) with an interior space (47) that is open on one side, wherein the motor holder (61) is provided on a base (64) or a side wall (65) of the basic body (59).

5. Fan according to claim 3, characterised in that the holding apparatus (54) engages with the motor (50) and the basic body (59) of the receiving apparatus (60) at a distance from the motor holder (61).

6. Fan according to claim 5, characterised in that the holding apparatus (54) is arranged on an insertion opening (62) on the basic body (59) of the receiving apparatus (60) and preferably engages with a front side of the motor (50).

7. Fan according to claim 1, characterised in that the holding apparatus (54) has at least one holding element (72), which is designed to be cap-shaped, collar-shaped washer-shaped or disc-shaped or comprise one or more holding tabs, which are releasably fastened to the motor (50) and the insertion opening (62) of the receiving apparatus (60).

8. Fan according to claim 1, characterised in that the motor holder (61) is provided on the base side on the receiving apparatus (60) and the at least one holding apparatus (54) is arranged between a side wall (65) of the receiving apparatus (60) and a housing section of the motor (50).

9. Fan according to claim 8, characterised in that the holding apparatus (54) has at least two strut-like projections (73), which are arranged on the side wall (65) of the basic body (59) of the receiving apparatus (60) and extend at least to the centre of the interior space (47).

10. Fan according to claim 9, characterised in that the strut-like projections (73) extend at least in sections along the side wall (65) of the basic body (59) of the receiving apparatus (60).

11. Fan according to claim 8, characterised in that the holding apparatus (54) is designed as a spring element, membrane element or rubber buffer.

12. Fan according to claim 3, characterised in that the at least one damping element (68) is designed as an elastic spring element, an elastic rubber element or as a membrane element.

13. Fan according to claim 1, characterised in that the holding apparatus (54) is designed as a cover that completely or partially closes the insertion opening (61) of the receiving device (60).

14. Fan according to claim 1, characterised in that the motor holder (61) that is designed as a stiffening element is provided on or in the base (64) of the receiving device (60).

15. Fan according to claim 14, characterised in that the receiving device (60) is produced as an injection-moulded part made from plastic and the motor holder (61) is at least partially moulded as an insertion.

16. Fan according to claim 14, characterised in that the motor holder (61) has a star-shaped or cross-shaped contour and has fastening points (79) at the outer end of the finger-shaped sections.