GB2212861A

GB2212861A - Blower and drive arrangement for vehicle ventilation apparatus

Info

Publication number: GB2212861A
Application number: GB8827259A
Authority: GB
Inventors: Gunter Siegel; Gunther Kohler
Original assignee: Daimler Benz AG
Current assignee: Daimler Benz AG
Priority date: 1987-11-26
Filing date: 1988-11-22
Publication date: 1989-08-02
Anticipated expiration: 2008-11-22
Also published as: DE3740132A1; GB2212861B; IT1235790B; FR2623757A1; JPH02155828A; GB8827259D0; IT8822595A0; DE3740132C2

Description

1 Ventilatingr apparatus for the interior of a 1 2-'M 2 1 \,ehicle The

invention relates to a ventilating apparatus for the interior of a vehicle having a plurality of blowers arranged at a mutual radial interval, by means of which intake air is feedable through pressure side discharge ducts to the interior A ventilating apparatus of this type is known (DE-OS 3,513,95-2) which is intended for a tourist omnibus and is arranged as a housing unit ready for installation in the rear roof region. In order to obtain good air distribution there over the entire approach surface, a plurality of radial blowers are arranged superimposed s- taggered in two rows in order to economise installation space. The blowers of the upper row are arranged with the discharge orifice upwards and the blowers of the lower row with the discharge orifice downwards. Each blower has an integrated particular drive motor as customary. The designs of the blower and of the associated drive motor must be mutually adapted. It has also been found difficult in close space conditions, in the case of such a superimposed staggered arrangement, to accommodate blowers each with a particular drive motor of the required capacity and size.

The underlying aim of the invention is to develop a ventilating apparatus for the interior of a vehicle which makes it possible to accommodate the individual components of the ventilating apparatus even in constricted space conditions without the need to accept sacrifices of capacity in the design.

According to the invention there is provided ventilating apparatus for the interior of a vehicle having a plurality of blowers arranged at a mutual radial interval, by means of which intake air is feedable through pressure side discharge ducts to the interior, wherein a drive motor common to all the blowers is provided which is coupled in transmission through a transmission device to 2 respective intake corresponding device, for example.

the individual impellers of the blower to drive them.

Because a drive motor common to all the blowers is provided which drives the individual impellers of the blowers through the transmission device, the drive motor can be accommodated with economy of space in regions of a vehicle, a motor vehicle for example, which cannot otherwise be used. The drive motor can then even be chosen of larger diameter, which makes a higher drive torque possible and permits the individual impellers- of-the blowers to be driven by the drive motor through the transmission device at reduced speed. An improvement in the efficiency of the drive motor can then be achieved.

Compared to conventional blowers having a drive motor each, the noise generated by the drive motor is reduced for comparable equal capacity. Because it is not necessary for the drive motor common to all the blowers to be located in a position which obstructs the flow, the scoop of a blower for example, the efficiency of the ventilating apparatus is improved by eliminating this impairment of the flow. The impellers of the individual blowers can be made of smaller diameter.

Consequently the axial extension parallel to the drive motor can be reduced and the space required for installation likewise, or else the circulation cross section dn the intake region, which is sometimes narrow depending upon the space conditions, can be improved.

This results in a further improvement in the efficiency of the individual blowers. The invention further creates the necessary conditions for varying the speeds of the impellers of the individual blowers at will, by the transmission also creates the necessary conditions for uncoupling and stopping the impellers of the individual blowers, or leaving them connected to the drive, at will by couplings for example.

The air capacity and also depending upon the configuration of the discharge ducts, the discharge direction, are therefore variable in a simple manner, without particular transmission means in The invention 3 air flaps or the like. For example, if an impeller of a blower is uncoupled from the drive by disengaging the coupling, then increased capacity of the drive motor is available for the remaining driven blowers, so that their speed and their air capacity increases. Part of the capacity reduction resulting from the stopping of a blower is therefore compensated. The invention also creates favourable conditions for separate discharge ducts and their discharge directions for each blower, so thata tbue right and left separation of the air volumes can be made, for example.

Further particulars and advantages of the invention will appear from the following description.

Th full text of the claims is not reproduced above solely in order reference is made numbers, however, disclosure relevant to avoid unnecessary repetition, but ot it solely by quoting the claim this is deemed to constitute express to the invention of all these claim features at this point. All features mentioned in the above and following description, and also those features apparent only from the drawing, are further constituents of the invention, even if they are not particularly emphasized and particularly not mentioned in the claims.

The invention is explained more fully below with reference to embodiments illustrated in the drawing in which:- Figs. I - 4 each show a diagrammatic side elevation of a ventilating apparatus of a vehicle according to a first, second, third and fourth embodiment respectively.

The ventilating apparatus 10 of -the first embodiment, shown in Fig. 1, is provided for the interior of a vehicle, particularly motor vehicle. It exhibits two blowers 20 and 30 arranged at a mutual radial interval, which are respectively constructed as radial blowers as The first blower 20 exhibits an indicated diagrammatically, in a housing 22. 21 is mounted and retained at least at one axial end for rotation about the axis 23. During the rotation of the customarv impeller 21, The im-neller 4 impeller 21 air is taken in at both axial end regions and fed through a discharge duct 24 associated with the blower 20 in the direction of the arrow 25 towards the interior of the vehicle.

The other blower 30 exhibits an impeller 31 in an associated housing 32. The impeder 31 is mounted at least at one axial end for rotation about the axis 33. Durin.-, the rotation of the impeller 31 the latter takes in air at both axial ends which is fed through a connected discha7rge duct 34 in the direction of the arrow 35) towards the interior of the vehicle.

Departing from the first embodiment not shown the ventilating exhibit more than two such blowers 20, The blowers 20, 30 are arranged interval. They are driven by a drive them through a transmission device transmission, which is in urn coupled embodiment, in an apparatus may also 30.

at a mutual radial motor 11 common to 12 coupled to it in in transmission to the individual impellers 21, 31 to driven them. The drive motor 11 is arranged at an interval from the impellers 21, 31 in the radial direction of the latter and in the region between the impellers 21, 31 and in a region otherwise unused, for example, therefore with space economy. The arrangement of the drive motor 11 is made here in the region between the housings 22 and 32.

The transmission device 12 exhibits a belt drive, particularly toothed belt drive or V-belt drive, the drive belt 13 of which is driven by a belt pulley 14 of the drive motor 11. Each blower 20, 30 exhibits respectively at the same one axial end of the respective impeller 21 or 31 a belt pulley 26 or 36 which is drivable by the drive belt 13 common to all. The blowers 20, 30 may have different blower capacities. Their impellers 21, 31 may be dimensioned with different diameters. Instead of this, or also additionally, the drive speed of the impellers 21, 31 may be chosen variable and/or of different values. This can be achieved in simple manner, for example by the belt pulleys 26, 36 exhibiting unequal diameters.

r In the described arrangement according to Fi.-. I the individual impellers 21, 31 are drivable by means of the drive motor 11 and of the transmission de,.-ice 12 respectively in the same direction of rotation, namely each clockwise. The two discharge ducts 24 and 34 of the two blowers 20 and 30 lead downstream, that is to say in the direction of the arrow 25, 35, into a common duct 15.

The ventilating apparatus 10 according to Fig. 1 has the advantage that under restricted space conditions a large capacity ventilating apparatus 10 can still be can be better utilised The single drive motor 11 common to the blowers 20, 30 can be chosen of larger diameter, because it is accommodated in an otherwise unused region, as shown, and can be mounted thereby flanges by an axial end, for example.

Due to the greater diameter of the drive motor 11, a higher drive torque is obtained, so that the drive motor 11 can drive the blowers 20, 30, through the transmission device 12, at lower speed. Improved efficiency of the drive motor 11 is also achieved.

therefore quieter compared to ventilating apparatus of equal diameters of the belt pulleys 26 accommodated and existing space The drive motor 11 is conventional drives of capacity. By unequal 36 it is possible to prescribe different speeds for the impellers 21 and 31, therefore also different blower diameter. A drive motor, which is otherwise located in the the intake scoop of the respective blower, the flow there and causes reduced blower In the case of the ventilating apparatus 10 the other hand the and particular region of obstructs efficiency.

according explained otherwise flow and therefore improves the efficiency of the ventilating apparatus 10. Smaller diameters of the impellers 21, 31 of the blowers 20 and 30 are also possible, so that the axial extension parallel to the drive motor 11 can also be reduced and thus the space requirement also, or else the circulation cross-section in to the invention, on 7 arrangement of the drive motor 11 in an unused region avoids this obstruction of the 6 the intake region, which is frequently relatively narrow, can be improved, resultin-- in a further impr6vement in the efficiency of the individual blowers 20, 30. The mounting of the impellers 21, 31 and of the belt pulley 14 may be at least on one axial side, and of a single component. This results in further simplification and cost reduction.

In the second embodiment shown in Fig.2, reference numerals increased by 100 are used for those parts which correspond to the first embodiment, so that reference is made to the description of the first embodiment in order to avoid repetition.

The ventilating apparatus 110 according to the second embodiment differs from that according to Fig. 1 by each blower 120, 130 exhibiting 126, 137, respectively constructed here as a solenoid coupling for example. The respective coupling 127, 137 is arranged between the transmission device 112 in the form of the belt drive and the impeller 121, or 131, driven by the latter, of the associated blower, in the belt pulley 126 or 136, or immediately axially adjacent to the latter, for example. The respective coupling 127 or 137 permits the drive of the impeller 121 and/or 131 to be uncoupled selectively and thus the air capacity and also, delDending upon the run of the respective discharge duct, the discharger direction to be varied, without the need of particular air flaps or the like for this purpose. Since the uncoupling of a blower makes more motor capacity available- for the other blower which continues to be 1 driven blower, and hence its air capacity, increases, so that part of the capacity reduction involved by the uncoupling of the one blower is compensated. Although a coupling 127 or 137 is associated with each blower 120, 130 in the second embodiment, in another embodiment, now shown, a coupling in the case of one blower may be sufficient. By engaging this coupling and thereby coupling the associated blower, the overall blower capacity stage can be doubled without increased heating up by resistance or existing power electronics a shiftable coupling driven, the speed of this stil Q 7 occurring, as is otherwise the case.

In the third embodiment in Fig. 3 the two blowers 220, 230 are located closer together. The drive motor 211 with belt pulley 214 is arranged on one side of the one blower 230, namely on the side which is remote from the other blower 220. The transmi sion device 212 in the form of the belt drive is provided with a tension roller 216 which engages the drive belt 213, namely so that the angle of wrap in the region of the belt pulley 236 of the blower 230 is increased. The tension roller 216 is urged towards the drive belt 213 by a spring 217 braced integrally with the housing and may also additionally be adjustable. Differently from the previous embodiments, the blowers 220, 230 here each exhibit mutually separate discharge ducts 224 and 234, which may also be al.igned in different directions, not shown in detail. Such separate discharge ducts 224, 234 and/or different discharge directions permit a true right and left separation of the air volumes, for example, SO that, for example, passing through the discharge duct 224 can be introduced into the interior of the vehicle in the left-hand region and the air passing through the other discharge duct 234 into the interior of the vehicle in the right-hand region. Shiftable couplings corresponding to the second embodiment may also be provided for each blower 220, 230 in this embodiment. Thus ventilation only on the left or only on the right or in both regions can be obtained at will by respective control of the couplings and their disengagement.

In the fourth embodiment shown in Fig. 4 the drive motor 311 with belt pulley 314 is located on one side of the one blower 330, as in Fig. 3. The drive motor 311 is again accommodated in a region which can not be used in other cases and for other purposes. Because, departing from the previous embodiments, the belt pulley 336 is not by the drive belt the latter, the mutually opposite the air arranged within the region surrounded 313, but is instead placed outside imnellers 321 331 are driven in 8 directions. The drawing also indicates that a filter 318, particularly active charcoal dust filter, for example, adjoins the discharge duct 334. Thus it is possible for example for the blower 330 alone to feed the filter 318, whereas the other blower 320 feed with air a discharge duct 324 which by-pass the filter 318. It is also possible to feed them both. The air passing directly or through the filter 318 then flows through an 319, indicated, and a following heat exchanger, towards the passenger compartment.

1 evaporator not. shown, 7 z 9

Claims

CLAIMS:

Ventilating apparatus for the interior of a vehicle having a plurality of blowers arranged at a mutual radial interval, by means of which intake air is feedable through pressure side discharge ducts to the interior, wherein a drive motor common to all the blowers is provided which is coupled in transmission through a transmission de'vice-to the individual impellers of the blower to drive them.
2. Ventilating apparatus according to claim I wherein the drive motor is arranged in the radial direction of the impellers of the individual blowers at an interval from the latter.
3. Ventilating apparatus according to claim 2, wherein the drive motor is arranged in the region between the impellers of two blowers.
4. Ventilating apparatus accordin& to claim 2, wherein the drive motor is arranged on the one side of a blower which is remote from an adjacent blower.
5. Ventilating apparatus accordina to any one of claims 1 to 4, wherein at least one blower has a shiftable coupling which is arranged between the transmission device and the impeller of said blower driven thereby.
6. Ventilating apparatus according to claim 5, wherein the coupling is constructed as a solenoid coupling.
7. Ventilating device according to any one of claims 1 - 6, wherein the transmission device has a belt drive, driven by a drive motor.
8. Ventilating apparatus according to claim 7, wherein each blower has at the respective same one axial end of the respective impeller a belt pulley drivable by a drive belt of the belt drive common to all which is drivable by means of a belt pulley driven by the drive motor.
9. Ventilating apparatus according wherein the belt drive exhibits an spring-loaded tension roller.

to claim 7 or 8, adjustable and/or
10. Ventilating apparatus according to one of claims 1 - 9,,,,herein the individual blowers have blower capacities of different values.
11. Ventilating apparatus according to any one of claims 1 - 9, wherein impellers of the individual blowers exhibit diameters of different values.
12. Ventilating apparatus according to any one of claims 1 - 11, wherein the drive speed of the impellers of the individual blowers is variable and/or us chosen of different values.
13. Ventilating apparatus according to any one of claims 8 - 12, wherein the belt pulleys of the impellers of the individual blowers have diameters of different value.
14. Ventilating apparatus according to any one of claims 1 - 13, wherein the individual impellers of the blowers are drivable in the respective same sense of rotation by means of the drive motor and of the transmission device.
15. Ventilating apparatus according to any one of claims 1 - 13, wherein the impellers of the blowers are drivable in mutually opposite directions of rotation.
16. Ventilating apparatus according to any one of claims 1 - 15, wherein the discharge ducts of the blowers lead downstream into a common duct.

AP 11
17. Ventilating apparatus according to any one of claims 1 - 15, wherein the blowers respectively ha-.-e mutually separate discharge ducts.

c
18. Ventilating apparatus according to claim 1-1, wherein the separate discharge ducts are aligned in different directions.
19. Ventilating apparatus according to claim 17, wherein a blower feeds a filter, by means of an ass'ociated discharge duct and the other blower feeds a filter bypass duct.
20. Ventilating apparatus for the interior of a vehicle ha-%,,ing a plurality of blowers arranged at a mutual radial interval, substantially as described herein with reference to and as illustrated in the accompanying drawings.

Published 1989 at The Patent Office, State House, 6671 High Holborn, Ioondon WCIR4TP. Further copies may I>e obtainedfrom The Patent Office. Wes Branch, St Mary Cray, Orpington- Kent BES 3P.D. Printed by Multiplex techniques ltd, St Mary Cray, Kent, Con- 1/87