EP0985829B1 - Housing for radial blower - Google Patents

Abstract

The fan housing has a housing assembly with at least one bearer part (5) mounted near an axial air inlet opening (1) of a fan and that forms a bearing for a bearer element of the fan assembly. The housing assembly has at least two shell parts (7a,7b) that are reversibly connected together and that divide the air inlet opening, whereby the bearer part is held between the shell parts in the assembled state. An Independent claim is also included for a fan.

Description

The invention relates to a housing for a blower, wherein the fan has at least one axial air inlet opening and has a radial air outlet opening and from a Housing assembly and a fan assembly with one There is an electric motor and a fan wheel, the housing assembly comprises at least one carrier part in the area the axial air inlet opening is arranged and for storing a support element of the fan assembly serves. The invention further relates to a radial fan of the type described above e.g. US-A-2 923 460.

Such a radial fan is from the German utility model DE-GM 297 06 216 known. This well-known blower consists of two side panels with air intakes and a jacket connecting the side parts with an air outlet. The blower is made of sheet metal. Via both sides attached to the end faces, designed as supporting stars Carrier parts is the electric motor with the fan wheel in the Interior of the housing rotatably mounted. That on the connection side arranged carrier part has a central Through opening through which the connecting lines for the electric motor.

The invention is based, for a blower housing the task of the type described above or a radial fan with this housing the manufacturing and assembly effort to lower.

This object is achieved in that the housing assembly at least two detachably connectable, the air inlet opening dividing shell parts, which Carrier part in the assembled state between the shell parts is held.

A fan with the housing according to the invention can this way be modular, the individual Basic elements by simply plugging and clipping or screwing can be mounted. The Assembly times can be shortened significantly.

Furthermore, it is extremely advantageous if that Carrier part of the housing according to the invention at least one support arm connected to a frame of the support part has that for receiving connecting cables for the Electric motor as a channel open on one side, in particular as a U-shaped strut is formed, wherein the frame is broken through by the channel so that the Connection lines above a top surface of the frame the carrier part can be led out. Through this Training can be done in a technically advantageous manner Threading and pulling the connecting cables for the Electric motor through a central opening of the Carrier part, as in the known radial fan is necessary.

Fig. 1

eine perspektivische Ansicht eines erfindungsgemäßen Radialgebläses mit einem erfindungsgemäßen Gehäuse,

Fig. 2

eine Seitenansicht (in Richtung der Rotationsachse) des in Fig. 1 dargestellten erfindungsgemäßen Radialgebläses und Gehäuses,

Fig. 3

einen Axialschnitt entsprechend der Linie III-III durch das in Fig. 2 dargestellte erfindungsgemäße Radialgebläse und Gehäuse,

Fig. 4

eine perspektivische Ansicht der Lüfterbaugruppe des in Fig. 1 dargestellten erfindungsgemäßen Radialgebläses in einem Zwischenzustand der Montage einschließlich einiger Bestandteile des erfindungsgemäßen Gehäuses,

Fig. 5

eine perspektivische Ansicht der in Fig. 4 dargestellten Teile des erfindungsgemäßen Radialgebläses in einem weiteren Zwischenzustand der Montage,

Fig. 6

eine perspektivische Explosionsdarstellung verschiedener Bestandteile des erfindungsgemäßen Gehäuses.

Further advantageous embodiments of the invention are contained in the subclaims and the description below. The invention will be explained in more detail with reference to an embodiment shown in the accompanying drawing figures. Show it:

Fig. 1

2 shows a perspective view of a radial fan according to the invention with a housing according to the invention,

Fig. 2

2 shows a side view (in the direction of the axis of rotation) of the radial fan and housing according to the invention shown in FIG. 1,

Fig. 3

3 shows an axial section along the line III-III through the radial fan and housing according to the invention shown in FIG. 2,

Fig. 4

2 shows a perspective view of the fan assembly of the radial fan according to the invention shown in FIG. 1 in an intermediate state of assembly, including some components of the housing according to the invention,

Fig. 5

4 shows a perspective view of the parts of the radial fan according to the invention shown in FIG. 4 in a further intermediate state of assembly,

Fig. 6

a perspective exploded view of various components of the housing according to the invention.

The same in the different figures of the drawing Parts always have the same reference numerals, see above that they are usually only described once become.

1 to 3 show the fan housing according to the invention and the radial fan according to the invention in the assembled state.

The fan according to the invention is shown as double-sided radial suction fan with two axial air inlet openings 1 and with a radial air outlet opening 2 trained. Although the invention is also one-sided radial suction fan applicable, the advantages of shown execution, however, are that in Comparison with one-sided suction radial fans lower Air speeds and therefore a quieter run are achievable.

The fan consists of a housing assembly and a fan assembly, the main components of Fan assembly an electric motor 3 and a fan wheel 4 are. The housing assembly is also made up of several parts. It comprises two carrier parts 5, which in the area of axial air inlet openings 1 are arranged and for bearing recording of a support element 6 of the fan assembly serve. By a double-sided in the illustrated radial suction fan on both sides of the Fan assembly in the housing assembly becomes an optimal one Power flow from the fan assembly to the housing assembly achieved. In particular, none occur in the carrier parts 5 Tilting moments.

The invention is particularly suitable for an embodiment in the as shown in the illustration Electric motor 3 is designed as an external rotor motor. The Support element 6 is in this case as an elongated, with their ends in the carrier parts 5 supported axis formed on the one hand a stator 3a of the electric motor 3 sits and on the other hand an external rotor 3b is rotatably mounted. This is a simple plug-in assembly possible, with a stable and low-noise system is formed.

As from FIGS. 1 and 2, but in particular from the exploded view of the housing parts in Fig. 6, clearly , the housing assembly has assembly technology optimized version at least two detachable with each other connectable, the air inlet opening 1 and the air outlet opening 2 dividing shell parts 7a, 7b, namely an upper half-shell part 7a and a lower half-shell part 7b, between which, as in particular from the sectional view of the fan in Fig. 3 clearly shows the support parts 5 are kept in the assembled state. The separation point the housing lies in a plane that is approximately in the middle to the blow-out opening 2 and the axis position of the motor 3. The housing according to the invention is more preferred Way of plastic, so that the individual components of the Housing assembly advantageously by injection molding can be produced.

The shell parts 7a, 7b are in the embodiment shown can be connected to one another via brackets 8. To the top and to hold the lower shell part 7a, 7b together is a total four brackets 8 attached, two of which are in the 1 in the rear area of the housing and two in the front of the case to the side of the Air inlet openings 1 and the air outlet opening 2 are arranged are. This connection represents a simple and robust technical solution, which due to the fact that Assembly no tools required and in case of repairs easy disassembly is possible as extremely inexpensive is to be assessed.

The carrier parts 5 have a flow-optimized Construction, in particular in its basic shape, circular, braced frame 9 on. The strut is there by means of three support arms 10 connected in a star shape, 10a formed. The support arms 10, 10a each extend from the center of the support part 5 arcuate outwards and are connected to the frame 9 there. The space between struts and frame 9 of the carrier part 5 forms the air inlet opening 1.

4 and 5 show two different assembly states of the Blower according to the invention. As already mentioned, the Figures the fan assembly with the electric motor 3, from the the standing (non-rotating) support axis as a support element 6 is led out on both sides. At least one in that Carrier part 5 held end of the support shaft 6 has an inner guide channel 11 for receiving connecting lines 12 for the electric motor 3. The advantage of this Channel routing of the connecting lines 12 consists in one concealed wiring. The axis is therefore partial, starting from one axis end, designed as a hollow axis. The Connection lines 12 are through the guide channel 11 in the interior of the electric motor 3 led to the stator 3a. The other ends of the connecting lines 12 end in a terminal box 13 in which both at AC motors required operating capacitor is housed, as well as any necessary fuses and similar components and a terminal block 14 for pluggable connection of a not shown (outer) motor connection cable. The terminal box 13 is open advantageously integrated into the fan unit in this way, can simply be removed in the event of a repair. The Motor connection cable advantageously does not need for assembly or disassembly through any openings to be drawn.

The terminal box 13 belongs to the housing assembly and is on one of the shell parts 7a, 7b releasably attachable. to Attachment can be provided by a screw an opening 15 at the lower part of the terminal box 13 passed through and for example as shown in Fig. 1, is screwed to the lower shell part 7b. The screw pushes the terminal box 13 at its lower End of the shell part 7b. Alternatively, molded ones are also used Locking hooks conceivable in specially trained Can snap tabs on the shell part 7b.

The terminal box 13 has on the upper edge for mounting on Shell part 7b at least one, in the illustrated Execution two mounting pins 16 on (Fig. 4, 5), which in appropriately arranged molded on the blower housing Intervene receiving pockets 17 (Fig. 1). This is one simple pre-fixation possible, and for fastening the Terminal box 13 only one screw is necessary.

On the two ends of the suspension axle are also like this from the above-mentioned German utility model DE-GM 297 06 216 is known, placed on elastic elements 18 for vibration-isolating bracket of the electric motor to the Support parts 5 serve. This is on the side of the electrical connection lines 12 attached elastic element 18 penetrated by these lines.

As is clear from the sectional illustration in FIG. 3, the elastic elements 18 are each formed in one piece, however, each consist of three axially one behind the other Sections 18a, 18b, 18c, and from a twist-proof with the carrier part 5 connecting carrier connection section 18a, a non-rotatable with the support element 6 connected motor connection section 18b and one arranged between the two connecting sections 18a, 18b elastically twistable intermediate section 18c. Elastic elements 18 designed in this way bring about a optimal vibration decoupling and noise reduction.

The respective elastic element 18 can in the direction of rotation of the electric motor 3 positive and thus relative rotations preventing plug connections with the support element 6 and / or be connected to the carrier part 5. These plug connections make assembly easier, since they are a simple insertion of the electric motor 3 in the Allow carrier part 5. For more details is fully referred to DE-GM 297 06 216.

An assembly consisting of the electric motor 3, the leads out of it 12, the one end on the terminal block located in the terminal box 13 14 are connected, and if necessary from both ends the support axis attached elastic elements 18 can with Advantage as a pre-assembled unit in the assembly process like a supplied part can be introduced. Such an assembly can be completely subjected to a test process, whereby the advantages through the separation into pre-assembled modules manufacturing in different production sites can be optimally used. The connecting cables led out 12 enable an easy to manufacture electrical connection of the module.

The fan wheel 4 can be mounted on a unit preassembled in this way be put on the rotor 3b of the electric motor 3 is pressed on. During further assembly, the two support parts 5 belonging to the housing assembly each placed laterally on the two elastic elements 18.

As shown in particular in FIG. 4, but also in FIG. 1, points the carrier part 5 a support arm connected to the frame 9 10a, which for receiving the connecting lines 12 for the Electric motor 3 as a channel 19 open on one side, in particular is designed as a U-shaped strut. Fig. 1 shows the top, Fig. 4 shows the bottom of the Strut. During assembly, the 13 outgoing connecting lines leading to the motor windings 12 are inserted into this support arm 10a. The Frame 9 is broken through by channel 19 in such a way that the connecting lines 12 above a top surface of the Frame 9 can be guided out of the carrier part 5. The connecting lines 12 are thus in the assembled state protected against external influences in the channel 19 of the support arm 10a, without being threaded through an opening to have to. The unit assembled in this way is shown in Fig. 5 shown. The radial fan can therefore also be used the assembled connecting lines 12 and with the Terminal box 13 are made to it then without a complicated threading into the housing according to the invention to be able to use. It is therefore advantageous Separation into complete assemblies possible. Because the connecting lines 12 are completely covered after installation, there is no risk of damage and it can affect one Cover hose for the connecting lines 12 omitted become.

As can be seen from the drawing figures 1, 2, 4, 5 the frame 9 of the carrier part 5 in its basic form circular, but the carrier part 5 does not have one completely rotationally symmetrical outer contour. In particular are two diametrically opposed in its outer contour Flattenings 20 are provided. Like the drawing figures 1 and 6 illustrate, they point to each other connected shell parts 7a, 7b in the area of Air inlet opening 1 one of this outer contour in the form adapted inner contour. The flats 20 serve as Assembly aid, in particular for centering and for one improved orientation during assembly.

In addition, on the periphery (shown in the Execution at the top and bottom) on each support part 5 Mounting pin 21 may be attached. This mounting pin 21 serve both as a positioning and assembly aid for Insert the pre-assembled unit between the shell parts 7a, 7b and the anti-rotation device.

To accommodate the with the support parts 5 (and the terminal box 13) The pre-assembled fan assembly is in the shell parts 7a, 7b, each bordering the air inlet opening Groove 22 provided. The carrier part 5 is in the assembled state clamping in this circumferential groove 22 in the Shell parts 7a, 7b held. This enables easy Plug-in assembly without additional parts. advantageously, there is no point load, because the Clamping forces are absorbed over surfaces. For the production the shell parts 7a, 7b preferably usable Injection molds can be carried out easily, but only an extraction direction for the injection molds is required is.

The groove 22 can advantageously be at least one, advantageously however two, e.g. above and below, diametrically opposed pocket-like depressions 23 have for receiving the mounting pin 21 of the carrier part 5. These depressions 23 act as anti-rotation devices and can be used for orientation during assembly. By the pocket-like design of the receptacles is the mounting pin 21 advantageously no longer after assembly visible.

When inserting the preassembled fan assembly into the The housing engages the respective outer edge of the carrier part 5 first in the circumferential groove 22 of the lower shell part 7b a, with the lower mounting pins 21 in the pocket-like Intervening recesses 23. After that it will upper shell part 7a placed. The respective outer edges and the mounting pin 21 of the support part 5 engage when Assemble in the circumferential groove 22 or in the pocket-like Recess 23 of the upper shell part 7a.

For easier positioning of the two shell parts 7a, 7b, one or more positioning pins 24 can be injection molded onto it be, each in corresponding openings 25th engage in the other shell part 7b, 7a opposite. In the illustrated embodiment, this is at the top Shell part 7a at the rear corner areas and at the bottom Shell part 7b at the front corner areas Positioning pin 24 is provided. This makes it advantageous possible to implement a so-called assembly catch i.e. e.g. the positioning pins 24 can on the in the drawing shown rear side of the invention Housing in the corresponding openings 25th are used, then the housing by a Swiveling movement can be closed until the on the front positioning pins 24 in the engage corresponding openings 25. Around the shell parts Holding together 7a, 7b can then - as already described above - a clamp connection between them by means of the brackets 8 shown as an individual part in FIG. 6 getting produced.

As can be seen from the above, the present invention is not illustrated Embodiment limited, but includes all in Means and measures having the same effect according to the invention. For example, when describing the terminal box 13 already hinted that it is possible to solve the Connections between the individual components to others than the way shown in each case (e.g. snap connection instead of the screw connection). The frame 9 the base part 5 does not have to be circular in its basic shape be trained. Furthermore, the division level between the shell parts 7a, 7b of the housing assembly not run in the manner shown. Through the described flats 20 it is e.g. easily possible that the division plane runs off-center. Also one Application of the invention to an embodiment with a Internal rotor motor is possible if necessary.

Furthermore, the person skilled in the art has numerous options for given further embodiment of the invention. So shows for example Fig. 1, that laterally on the terminal box 13 is a cable duct piece 26, which is in the further radially to the formed by the U-shaped bracket 10a Channel 19 of the carrier part 5 connects. Through this piece of cable duct 26 is a complete coverage of the connecting lines 12 ensures that both a mechanical Protection and protection against contact ensured is. Because of this advantageous concealed cable routing here, too, no insulation of the connecting lines an additional hose is necessary. 1 also shows that in the area of the discharge opening 2 for suppression blow-out noises, an arcuate tongue 27 that separates the suction chamber from the pressure chamber.

reference numeral

1

Air inlet opening

2

air blow

3

electric motor

3a

Stator of 3

3b

Rotor of 3

4

fan

5

support part

6

Support element (axis)

7a

upper shell part

7b

lower shell part

8th

clip

9

Frame of 5

10

Beam

10a

Support arm with 19

11

Guide channel in 5

12

leads

13

terminal box

14

Terminal block in 13

15

Opening in 13

16

Mounting pin on 13

17

Pockets for 16

18

elastic member

18a

Beam connection section of FIG. 18

18b

Motor connection section from 18

18c

Intermediate section of 18th

19

channel

20

Flattening on 9

21

Mounting pin on 9

22

Groove in 7a, 7b

23

Deepening in 22nd

24

positioning

25

positioning

26

Cable channel piece

27

tongue

Claims (19)

1. Housing for a blower, the blower having at least one axial air-inlet opening (1) and one radial air-outlet opening (2) and comprising a housing sub-assembly, and an impeller sub-assembly having an electric motor (3) and an impeller (4), the housing sub-assembly comprising at least one carrier part (5) which is arranged in the region of the axial air-inlet opening (1) and which is used to receive and act as a mounting for a supporting member (6) of the impeller sub-assembly, characterised in that the housing sub-assembly has at least two shell parts (7a, 7b) which can be releasably connected together and which split the air-inlet opening (1), the carrier part (5) being held between the shell-parts (7a, 7b) in the assembled state.
2. Housing according to claim 1, characterised in that the electric motor (3) is in form of an external-rotor motor, the supporting member (6) being in the form of an elongated support shaft which is mounted in the carrier part (5) at at least one of its ends and on which, on the one hand a stator (3a) of the electric motor (3) is seated and on the other hand an external rotor is mounted to rotate.
3. Housing according to claim 1 or 2, characterised in that, in the assembled state, the carrier part (5) is held in the shell parts (7a, 7b) with a clamping action in a groove (22) which borders the air-inlet opening (1).
4. Housing according to any of claims 1 to 3, characterised in that the shell parts (7a, 7b) can be releasably connected together by clips (8).
5. Housing according to any of claims 1 to 4, characterised in that the carrier part (5) has a strutted frame (9) of which the basic configuration is, in particular, annular, the strutting being formed by carrier arms (10, 10a), of which there are preferably three, which are connected together in a star shape.
6. Housing having a carrier part (5) to receive and act as a mounting for a supporting member (6) of an impeller sub-assembly of a blower, particularly according to any of claims 1 to 5, characterised in that the carrier part (5) has at least one carrier arm (10a) connected to a/the frame (9), which carrier arm (10a) is in the form of a channel (19) open on one side, and in particular in the form of a strut formed to a U-shape, to receive connecting leads for an/the electric motor (3), the frame (9) being pierced by the channel (19) in such a way that the connecting leads (12) can be run out of the carrier part (5) above an outer surface of the frame (9).
7. Housing according to any of claims 2 to 6, characterised in that an end of the support shaft which is mounted in the carrier part (5) has an internal guiding passage (11) to receive connecting leads (12) for the electric motor (3).
8. Housing according to any of claims 1 to 7, characterised in that the carrier part (5) has an external contour which is not symmetrical in rotation, and particularly an external contour which has two diametrically opposed flats (20), and the shell parts (7a, 7b) which are connected together have, in the region of the air-inlet opening (1), an internal contour which is matched to this external contour.
9. Housing according to any of claims 1 to 8, characterised in that the carrier part (5) has at least one peripherally arranged assembly lug (21) and at least one of the shell parts (7a, 7b) has a receptacle for this assembly lug.
10. Housing according to claim 9, characterised in that the receptacle (23) for the assembly lug (21) is in the form of a pocket-like depression in the groove (22) bordering the air-inlet opening (1).
11. Housing according to any of claims 1 to 10, characterised in that at least one of the shell parts (7a, 7b) has at least one locating pin (24) and the other shell part (7b, 7a) has at least one corresponding locating opening intended to receive the locating pin (24).
12. Housing according to any of claims 1 to 11, characterised in that the housing sub-assembly comprises a terminal box (13), which can be releasably fastened to one of the shell parts (7a, 7b), to receive a connecting terminal strip (14), the connecting terminal strip (14) being used to connect an (external) electrical connecting cable to (internal) connecting leads (12) belonging to the electric motor (3).
13. Housing according to claim 12, characterised in that the terminal box (13) has at least one assembly lug (16) and one of the shell parts (7a, 7b) has at least one receiving pocket (17) for this assembly lug (16).
14. Housing according to claim 12 or 13, characterised in that the connecting leads (12) of the electric motor (3) are run between the terminal box (13) and the carrier part (5) in a piece of cable ducting (26).
15. Housing according to any of claims 1 to 14, characterised in that the supporting member (6) of the impeller sub-assembly is connected to the carrier part (5) via a one-piece elastic member (18), the elastic member (18) comprising three sections (18a, 18b, 18c) situated one behind the other, namely a carrier-connecting section (18a) which is connected to be secure against torsion to the carrier part (5), a motor-connecting section (18b) which is connected to be secure against torsion to the supporting member (6), and an elastically deformable intermediate section (18c) which is arranged between the two connecting sections (18a, 18b).
16. Housing according to claim 15, characterised in that the elastic member (18) is connected to the supporting member (6) and/or to the carrier part (5) by plug-in connections which are positively interengaged in the direction of rotation of the electric motor (3) and which thus prevent any relative rotation.
17. Blower having a housing according to any of claims 12 to 16, characterised by a pre-assembled sub-assembly comprising the electric motor (3) having the supporting shaft which runs out of the electric motor (3) and which is partly, starting from one end of the shaft, in the form of a hollow shaft, the internal guiding passage (11) in the supporting shaft receiving the connecting leads (12) for the electric motor (3) which are connected at one end to the connecting terminal strip (14) situated in the terminal box (14).
18. Blower according to claim 17 , characterised in that the pre-assembled sub-assembly also comprises elastic members (18) which are fitted at both ends of the supporting shaft to provide a mounting for the electric motor (3) which gives insulation against vibration, the elastic member (18) which is fixed in place at the cabled end having the connecting leads (12) passing through it.
19. Blower having a housing according to any of claims 1 to 16 or according to claim 17 or 18, characterised in that it is in the form of a double-entry centrifugal blower having two axial air-inlet openings (1) and two carrier parts (5) in the region of these air-inlet openings (1).

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