U.S. patent application number 13/071057 was filed with the patent office on 2011-09-29 for cooling device for a motor vehicle.
This patent application is currently assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC. Invention is credited to Udo MILDNER.
Application Number | 20110232865 13/071057 |
Document ID | / |
Family ID | 43981068 |
Filed Date | 2011-09-29 |
United States Patent
Application |
20110232865 |
Kind Code |
A1 |
MILDNER; Udo |
September 29, 2011 |
COOLING DEVICE FOR A MOTOR VEHICLE
Abstract
A cooling device is provided for a motor vehicle with a first
heat exchanger and with a second heat exchanger that is arranged in
vehicle longitudinal direction offset from the first heat
exchanger. In the intermediate space between first and second heat
exchanger a flow regulating device with a cross-sectional area
through which cooling air can flow is arranged, whose permeability
to cooling air is variable.
Inventors: |
MILDNER; Udo; (Limburg,
DE) |
Assignee: |
GM GLOBAL TECHNOLOGY OPERATIONS
LLC
Detroit
MI
|
Family ID: |
43981068 |
Appl. No.: |
13/071057 |
Filed: |
March 24, 2011 |
Current U.S.
Class: |
165/98 ;
165/96 |
Current CPC
Class: |
F01P 7/10 20130101; Y02T
10/88 20130101; F01P 3/18 20130101; B60K 11/085 20130101; F01P
2003/187 20130101 |
Class at
Publication: |
165/98 ;
165/96 |
International
Class: |
F01P 7/10 20060101
F01P007/10; F28F 27/00 20060101 F28F027/00 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 24, 2010 |
DE |
102010012485.0 |
Claims
1. A cooling device for a motor vehicle, comprising: a first heat
exchanger; a second heat exchanger that is offset to the first heat
exchanger in a longitudinal direction of the motor vehicle; and a
flow regulating device in an intermediate space between the first
heat exchanger and the second heat exchanger, the flow regulating
device including a cooling air through flow-capable cross-sectional
area with a variable permeability to the cooling air.
2. The cooling device according to claim 1, wherein the motor
vehicle, the first heat exchanger is arranged downstream of the
flow regulating device and the second heat exchanger is arranged
upstream of the flow regulating device.
3. The cooling device according to claim 1, wherein the flow
regulating device extends in a plane that is substantially
perpendicular to a driving direction of the motor vehicle and
substantially over a cross section that can be subjected to inflow
from the first heat exchanger.
4. The cooling device according to claim 1, wherein the flow
regulating device extends in a plane that is substantially
perpendicular to a driving direction of the motor vehicle and
substantially over a cross section that can be subjected to through
flow from the second heat exchanger.
5. The cooling device according to claim 1, further comprising a
frame for the flow regulating device through which the cooling air
can flow and on which an actuator is configured to change the
through flow-capable cross-sectional of the flow regulating
device.
6. The cooling device according to claim 5, wherein the frame
comprises a two-component lattice structure with a front lattice
substantially overlapping a rear lattice.
7. The cooling device according to claim 6, wherein the actuator is
a roller blind displaceable between the front lattice and the rear
lattice.
8. The cooling device according to claim 6, wherein a winding shaft
substantially aligned in a transverse direction of the motor
vehicle is arranged on an upper end portion of the two-component
lattice structure.
9. The cooling device according to claim 5, wherein the actuator
comprises an areal structure with a first passage spaced from a
second passage configured for the cooling air.
10. The cooling device according to claim 6, wherein the front
lattice and the rear lattice are positively interconnectable.
11. The cooling device according to claim 8, wherein the front
lattice on an upper marginal portion has a mounting for the winding
shaft.
12. The cooling device according to claim 8, wherein the rear
lattice on an upper marginal portion has a covering for the winding
shaft.
13. The cooling device according to claim 5, wherein the frame is
supported on an air guiding device with a marginal sealing
element.
14. The cooling device according to claim 8, further comprising a
guide strip for an end portion of a roller blind unwindable from
the winding shaft.
15. The cooling device according to claim 8, wherein the winding
shaft is operationally connected to a drive.
16. The cooling device according to claim 14, wherein the guide
strip is operationally connected to a drive.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims priority to German Patent
Application No. 102010012485.0, filed Mar. 24, 2010, which is
incorporated herein by reference in its entirety.
TECHNICAL FIELD
[0002] The technical field relates to a cooling device for a motor
vehicle with at least one first and one second heat exchanger each
subject to cooling air.
BACKGROUND
[0003] Cooling devices or cooling systems are indispensable for the
discharge of the waste heat generated during the operation of a
motor vehicle. Popular cooling devices have a multiplicity of
different heat exchangers that are subjected to cooling air inflow
or through flow and in this way can discharge thermal energy of a
heat exchanger medium circulating in a circuit to the
environment.
[0004] In addition to a radiator thermally coupled to a combustion
engine known cooling systems comprise further heat exchangers such
as for example a charge air cooler, a transmission oil cooler as
well as a condenser of a vehicle air conditioner. All these heat
exchangers are mostly arranged on a common cooling module, which
furthermore comprises a fan arrangement for generating an air
stream in order to generate a cooling air flow that is adequate for
discharging the heat even in the low speed range or with the
vehicle stationary.
[0005] Particularly when driving in a middle or higher speed range
the headwind generates a dynamic air pressure that is adequate for
the cooling of the heat exchangers. Besides, if the vehicle for
example is moved with uniform speed on a substantially level route
the power demand on the drive unit is relatively low; accordingly,
the heat quantity to be discharged to the environment is
comparatively low. However, especially in the higher speed range
the aerodynamic of the motor vehicle plays an increasingly greater
role. The supplied cooling air typically branched off from the
headwind for example swirls in the region of the heat exchangers
and of the vehicle floor. Permanently subjecting heat exchangers of
a cooling device of a motor vehicle to cooling air can have a
disadvantageous effect on the aerodynamics of the vehicle.
[0006] From DE 102 35 192 A1 a cooling system is known, which in a
first operating phase is cooled via a first air flow path and in a
second operating phase by means of a second air stream passing a
second air flow path. Here, a device for controlling the air stream
flowing through the radiator is provided, wherein that device is
arranged in the outflow region of the radiator. In this way, a more
homogenous through flow of the radiator over the entire cooling
surface is to be realized so that the cooling capacity of the
radiator and possible additional heat exchangers can be increased.
That known device for controlling the air stream in this case is
designed as covering device with at least one pivotable flap or
with a lateral roller blind box. The covering device in this case
however is arranged downstream of all heat exchangers seen in
driving direction of the vehicle, as a result of which the
installation space requirement of the cooling system in the vehicle
is increased.
[0007] In view of the foregoing at least one objective is to
provide a cooling device that is optimized with respect to
installation space requirement, which with respect to its cooling
capacity is adaptable to different requirements and which in
addition contributes to the improvement of the aerodynamics of the
motor vehicle. In addition, other objectives, desirable features
and characteristics will become apparent from the subsequent
summary and detailed description, and the appended claims, taken in
conjunction with the accompanying drawings and this background.
SUMMARY
[0008] The cooling device is designed for a motor vehicle. It
comprises at least one first and one second heat exchanger. The two
heat exchangers are arranged offset from each other in vehicle
longitudinal direction or in driving direction of the vehicle. The
cooling device in this case is preferably designed as preassembled
cooling module which comprises a multiplicity or even all heat
exchangers of a motor vehicle cooling system and as an integrated
unit can be preferentially arranged in the vehicle front
region.
[0009] To improve the vehicle aerodynamics a flow regulating device
is arranged in the intermediate space between first and second heat
exchanger which comprises a cross-sectional area through which
cooling air can flow. The permeability of that cross-sectional area
to cooling air can be changed. As far as this is concerned the flow
regulating device comprises regulating or adjusting means for
changing the through flow-capable cross-sectional area of the flow
regulating device.
[0010] Alternatively or additionally it can be further provided
that instead of changing the cross-sectional area through which a
flow can freely flow to merely change the flow resistance for
supplied cooling air. With the help of the flow regulating device
arranged in the intermediate space between at least two heat
exchangers the quantity and the flow rate of cooling air to be
supplied can be variably and preferentially continuously changed in
accordance with the cooling requirements of the cooling device.
[0011] If for instance, dependent on the present driving
performance, only a comparatively low cooling capacity is to be
generated by the cooling device the cooling air permeability of the
flow regulating device can be lowered to improve the vehicle
aerodynamics. Upon provision of an increased cooling capacity by
contrast the permeability of the flow regulating device to cooling
air is to be maximized for example through enlarging the through
flow-capable cross-sectional area.
[0012] Here it proves to be particularly advantageous that the flow
regulating device seen in vehicle longitudinal direction is
arranged in an intermediate space formed by two heat exchangers.
Here, installation space that is available between the respective
heat exchangers anyhow is utilized so that for the flow regulating
device no additional installation space for instance located in
driving direction behind a radiator is required. Here, the flow
regulating device utilizes the free space which is obtained anyhow
upon assembly or upon compilation of individual heat exchangers of
the cooling device.
[0013] According to an embodiment it is provided that seen in
driving direction of the vehicle the first heat exchanger is
arranged downstream of the flow regulating device and the second
heat exchanger is arranged upstream of the flow regulating device.
Here it is more preferably provided to design the first heat
exchanger as radiator which is thermally coupled to a drive unit of
the vehicle. The second heat exchanger in this case can be
preferentially designed as condenser of a motor vehicle air
conditioner. An obverse arrangement according to a further
alternative is likewise intended.
[0014] According to a further embodiment the flow regulating device
substantially extends in a plane perpendicularly to the driving
direction of the vehicle. In this regard, it substantially extends
completely over the inflow or through flow-capable cross-section of
the first and/or second heat exchanger. Thus, the flow regulating
device is more preferably designed for the optional blocking or
opening of a flow channel through which cooling air can flow. In a
closed configuration the flow regulating device can almost
completely cut off or separate from a cooling air supply the heat
exchanger arranged downstream of said flow regulating device.
[0015] According to a further embodiment it is further provided
that the flow regulating device comprises a frame through which
cooling air can flow, on which at least one actuator changing the
through flow-capable cross-sectional area of the regulating device
is displaceably and/or pivotably arranged. Thus, more preferably
pivotable fins or flaps and a not substantially through
flow-capable areal structure displaceable over the area of the
frame can be arranged on the frame. The actuator or a plurality of
actuators in this case can either completely open the through
flow-capable cross-sectional area or close said cross-sectional
area completely or only partially. Here, more preferably a
continuous adjustment of the actuator is provided so that a cooling
capacity that is adaptable to the respective cooling requirements
can be provided by the cooling device.
[0016] According to an embodiment it is additionally provided that
the frame comprises a lattice structure having at least two
components with a front lattice and a rear lattice. The individual
lattice components in this case are substantially arranged in an
overlapping manner relative to each other. Front and rear lattice
are additionally arranged one after the other seen in vehicle
longitudinal direction or in driving direction and form a support
structure for an individual actuator or for a plurality of variably
adjustable actuators. Through the arrangement substantially
overlapping each other of front and rear lattice the flow
resistance of the lattice structure can be kept as low as possible
despite an arrangement extending over the entire flow cross
section.
[0017] According to a further embodiment the actuator in this case
is designed as a roller blind displaceable between front and rear
lattice. In so far as that is concerned the actuator comprises an
areal structure that can be rolled up or wound up which can be
substantially designed impermeable to cooling air. Here, the
extension or the space requirement of the roller blind parallel to
its areal normal in the unwound state proves advantageous. For a
roller blind together with a correspondingly narrow frame structure
in vehicle longitudinal direction can be placed in the intermediate
space between condenser and radiator of the cooling device without
problem.
[0018] In that the roller blind on both sides, namely in each case
towards the adjacent heat exchangers located upstream and
downstream is encased by a lattice any possible deformations or
flapping of the roller blind can be effectively counteracted.
Dynamic pressure bearing against the roller blind occurring in
driving operation can be absorbed by the supporting lattice without
substantial deformation of the roller blind. The encasing of the
roller blind on both sides between front and rear lattice
additionally prevents a potential damaging of the roller blind
through dynamic pressure.
[0019] Here it is of particular advantage if the winding roller or
the winding shaft of the roller blind comes to lie outside that
intermediate space of the heat exchangers. According to an
embodiment it is more preferably provided that the winding shaft is
arranged on an upper end portion of the lattice structure and
thereby, seen in vehicle vertical direction, protrudes from an
upper end portion of at least one of the heat exchangers. In this
way the roller shaft itself, seen in vehicle longitudinal or
vehicle transverse direction, can come to lie at least in portions
in an overlapping manner with the first and/or the second heat
exchanger. In addition, the alignment of the winding shaft in
vehicle transverse direction has the advantage that unwinding of
the roller blind can take place under the effect of the weight
force of an unwindable end portion of the roller blind. Depending
on the adhesive or sliding friction resistance of the roller blind
within the lattice structure, unwinding of the roller blind can
even take place entirely without separate driving device, solely
due to the weight force of the free roller blind end. Merely for
winding up the roller blind would the help of a drive be required.
Thus, the winding shaft and/or the guide strip are operationally
connected to a drive for winding up and/or unwinding the roller
blind. Here, the drive can either act directly on the winding shaft
or be operationally connected to a guide element separately
fastened to the roller blind with a force transmission means
transmitting a pulling or pushing force.
[0020] According to a further embodiment the actuator comprises an
areal structure with passage openings for cooling air spaced from
one another. Thus the roller blind can more preferably comprise
individual passage openings corresponding to the lattice structure
preferentially spaced equidistantly from one another, so that even
with closed roller blind a minimum air supply to the heat exchanger
located behind said roller blind in driving direction can be
provided. The size as well as the geometrical distribution of
individual passage openings in this case can be adapted to the
geometrical targets and particularities of the respective heat
exchanger and of the flow channel conducting the cooling air.
[0021] According to an embodiment the front lattice and the rear
lattice can be positively connected to each other. More preferably
it is hereby provided that the connection of the two lattices to be
substantially arranged in an overlapping manner relative to each
other is effected by means of latching or clipping connection in
their marginal region. Holding or latching means provided for this
purpose can be preferably formed in one piece with the respective
lattices or be molded thereon.
[0022] In addition to positive connecting means for the front and
the rear lattice other connections such as for example rivet or
screwing connections of the lattice components can also be
implemented. In addition, the lattice components can be produced as
injection molded parts, for instance of glass fiber-reinforced
thermoplastic, such as for example polyamide with an at least
40-percent glass fiber component. In addition it is conceivable to
design the lattice structure or at least components thereof as die
casting components or light metal extruded components. Possible
suitable light metals in this case are more preferably aluminum or
magnesium. It can also be provided to combine individual metal
casting or extruded parts with plastic injection molded parts in
hybrid construction.
[0023] According to a further embodiment it is provided that the
front and/or the rear lattice at an upper marginal portion
comprise/s a mounting or a covering for the winding shaft. To that
extent the lattice structure can comprise an integrated mounting or
covering for the winding shaft of the roller blind. The winding
shaft with roller blind wound up thereon to that extent has to be
merely inserted rotatably mounted into that lattice-end mounting
during a final assembly.
[0024] Here it can be additionally provided that mounting or
covering preferably provided on an upper edge of the lattice
structure is simultaneously provided with a sealing element, with
which the lattice frame supports itself as air-tight as possible on
an air guiding device adjoining to the outside. The provision of a
sealing element in this case is not restricted to the region of the
winding shaft. The lower as well as lateral end portions of the
lattice frame can each also be provided with a preferably
strip-like sealing element, which in each case upon reaching of a
final assembly configuration supports itself on a marginally
adjoining air guiding device preferably in an airtight manner.
[0025] Through that quasi sealing arrangement of the lattice frame
guiding the roller blind on adjoining air guiding devices it can be
advantageously achieved that the cooling air fed in via a flow
channel and flowing through the second heat exchanger is almost
completely dammed-up and with opened roller blind flows onto the
heat exchanger, preferably the radiator or the cooling device
located downstream of the flow regulating device without any
pressure loss worth mentioning.
[0026] According to an embodiment it is additionally provided that
an end portion of the roller blind that can be unwound from the
winding shaft is provided with a guide strip. On the one hand, the
guide strip through its weight force can assist unrolling of the
roller blind. In addition, the guide strip on both of its end
portions can be separately guided on the lattice frame. There it is
additionally conceivable to couple the end portions of the guide
strip with a drive so that rolling up and unrolling of the roller
blind can be effected via a displacement movement of the guide
strip initiatable by a drive. The guide strip ends in this case can
for example be coupled to a screw, cable or chain drive. In
addition, a rotary spring element would be preferably provided on
the winding shaft by means of which the roller blind can be wound
up.
[0027] In addition to a cooling device, furthermore relates to a
motor vehicle that is equipped with a cooling device according to
the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The present invention will hereinafter be described in
conjunction with the following drawing figures, wherein like
numerals denote like elements, and:
[0029] FIG. 1 is an isolated perspective representation of the
cooling device according to an embodiment of the invention;
[0030] FIG. 2 is a perspective representation of the cooling device
in an installation situation on the vehicle;
[0031] FIG. 3 is a vertical cross section along the cross-section
line A-A according to FIG. 2;
[0032] FIG. 4 is an enlarged detail of the cross section according
to FIG. 3;
[0033] FIG. 5 is a horizontal cross section through the arrangement
according to FIG. 2 along B-B;
[0034] FIG. 6 is an enlarged representation of the right margin of
the cross section according to FIG. 5;
[0035] FIG. 7 is an isolated perspective representation of the flow
regulating device;
[0036] FIG. 8 is an exploded representation of the individual
components of the flow regulating device;
[0037] FIG. 9 is an isolated perspective representation of a
wound-up roller blind; and
[0038] FIG. 10 is an unwound roller blind.
DETAILED DESCRIPTION
[0039] The following detailed description is merely exemplary in
nature and is not intended to application and uses. Furthermore,
there is no intention to be bound by any theory presented in the
preceding background or summary or the following detailed
description.
[0040] The cooling device 10 shown in FIG. 1 and FIG. 2 in
perspective representation comprises a plurality of heat exchangers
such as for example a charge air cooler 12, a dryer 14 of a vehicle
air conditioner, a condenser 16 of the vehicle air conditioner and
a radiator 30 located behind the condenser 16 and not explicitly
shown in FIG. 1. While the condenser 16 and the dryer 14 are part
of the climate circuit of the vehicle and through which a
refrigerant can accordingly flow, the radiator 30 is in thermal
contact with the drive unit, preferentially the combustion engine
of the motor vehicle. By contrast, the charge air cooler 12 is
coupled to a turbocharger.
[0041] The radiator 30 shown in cross section according to FIG. 5
and FIG. 6 comprises a cooling water tank 18 on its end portion
lying in vehicle transverse direction which is constructed
comparatively wide in vehicle longitudinal direction. This cooling
water tank seen in vehicle longitudinal direction protrudes at
least to a minor extent over the radiator 30 so that with an
arrangement of condenser 16 and radiator 30 located one after the
other in vehicle longitudinal direction an intermediate space 48
shown enlarged in FIG. 6 is inevitably created.
[0042] The cooling device 10 shown separately in FIG. 1 is to be
fastened to a front structure 26 of the vehicle body according to
FIG. 2. For the controlled and effective inflow of the individual
heat exchangers 12, 14, 16, 30 with supplied cooling air a lateral
and circumferential cooling air guide 28 is additionally provided
in this case, which encloses the cooling device in the final
assembly situation on the front structure region of the vehicle
body at least in certain regions. The cooling air flow branched-off
from the headwind or generated by a fan separately provided for
this purpose initially flows through the condenser 16 mounted
upstream in driving direction and subsequently through the radiator
30 arranged behind. Upon or after the passage through those heat
exchangers 12, 16, 30 the cooling air is sometimes subjected to
quite severe swirling, which can noticeably impair the aerodynamics
of the motor vehicle, particularly in a high speed range.
[0043] To improve the vehicle aerodynamics a flow regulating device
20 is provided in the intermediate space 48 between condenser 16
and radiator 30, which substantially extends over the entire
through flow-capable cross section of the intermediate space 48
between condenser 16 and radiator 30. The flow regulating device
comprises a lattice structure 40 shown in FIG. 7 and FIG. 8 whose
cross-sectional area through which cooling air can flow is variable
with respect to its permeability to cooling air.
[0044] In the configuration shown in FIG. 7 to FIG. 10 it is more
preferably provided here to provide a winding shaft 34 on the upper
margin of the lattice structure 40, on which a roller blind 36 that
can be unwound downwards is wound up. The winding shaft 34 in this
case can be directly provided with an electric motor drive 22 which
through a corresponding activation can transfer the roller blind 36
into an unwound and thus unfurled configuration shown in FIG. 10 or
into a wound-up configuration thus opening the through flow-capable
cross section shown in FIG. 9. The drive 22 in this case is
provided with a plug 52 in order to simplify its electrical
contacting. It is furthermore conceivable to transfer the roller
blind 36 variably and continuously into part-opened positions
located in between.
[0045] The roller blind 36, as separately shown in FIG. 8, is
mounted between two inter-corresponding lattice structures 42, 44
in a displaceable or roll-up-capable manner. A front lattice 42 in
this case corresponds to a rear lattice 44. The two lattices can be
directly connected to each other subject to mounting the roller
blind arrangement 20 in a mounting 50 arranged on the upper end
portion of the front lattice 42 provided for this purpose.
Connecting the two lattices 42, 44 lateral clips or similar
fastening means 46 are provided for example on the front lattice
42. The front lattice 42 also has a fastening strap 24 standing
away in vehicle transverse direction, by means of which the flow
regulating device 20 shown in a pre-assembled manner in FIG. 7 can
be fastened to the cooling device, for example on the cooling water
tank 18, as is indicated for example in FIG. 1. At its upper end
portion the rear lattice 44 also comprises a kind of latching lug
56, by means of which the rear lattice 44 can for example be
fastened to the lateral strap 24 of the front lattice 42.
[0046] In that the roller blind that can be wound up onto the
winding shaft 34 is displaceably arranged between two
inter-corresponding lattice structures 42, 44 a deformation
impairing the functionality of the roller blind web 36 can be
largely prevented even upon occurrence of a substantial dynamic
pressure on the roller blind 36. The roller blind 36 can
additionally comprise individual passage openings 38 as is evident
from FIGS. 4 and 10. Here, the passage openings 38 with a
completely run-down roller blind 36', as for example shown in FIG.
10, come to lie in the region of the lattice intermediate spaces.
Thus, even with a roller blind 20 still located in closing
position, a minimum of cooling air can still be supplied to the
radiator 30 located behind. With unwound roller blind 36' a dynamic
pressure can be generated in the region of the lateral cooling air
guide 28 so that the cooling air branched off the headwind
laterally flows past the cooling device 10 which under aerodynamic
aspects proves more favorable than flowing through and swirling
through the various heat exchanges 12, 16, 30.
[0047] The roller blind 36 furthermore comprises a guide strip 54
at its end portion facing away from the winding shaft 34, which on
the one hand through its weight force supports an unrolling of the
roller blind 36 from the winding shaft 34. In addition, the guide
strip 54 keeps the roller blind 36 tensioned in the completely or
partially lowered configuration. In addition, by way of a lateral
guide of the guide strip not explicitly shown in the Figures, for
example on the lattice structure 40, the roller blind 20 can be
wound up or unwound, for example in that end portions of the guide
strip 54 located in vehicle transverse direction are coupled to
suitable drive means, for example with a cable pull, a chain drive
or a spindle drive. In this case, a spring element preferably is to
be provided in the region of the winding shaft 34 which with
diminishing downward pulling force on the guide strip 54 winds up
the roller blind 36 in a self-acting manner.
[0048] The lattice structures 42, 40 shown in FIG. 8 and in FIG. 7
in the assembled state are preferably designed as injection molded
parts. Temperature-resistant plastics such as glass
fiber-reinforced polyamide but also light metals such as aluminum
are possible as suitable material for the guide lattice 40.
[0049] Preferably an elastic sealing lip 32 is to be provided on
the lower end portion of the front lattice 42 by means of which the
lattice structure largely supports itself in a sealing manner on
the charge air cooler 12, as is evident for example from the cross
section according to FIG. 4. Here it is additionally shown that
front lattice 42 and rear lattice 44 are positively inter-latched
in the lower marginal region. In addition, the flat roller blind 36
comes to lie between the lattice bars of front lattice 42 and rear
lattice 44.
[0050] In the cross section according to FIG. 3 it is additionally
evident that the mounting 50 located at the top and arching
backwards strip-like simultaneously acts as sealing element for the
winding shaft 34, with which the lattice structure 40 supports
itself upwards on the air guiding device 28 preferably in an
air-sealing manner.
[0051] The mounting 50 in this case can be more preferably
unitarily joined to the front lattice structure 42. In the cross
section according to FIG. 5 and FIG. 6 a lateral clip 46 is
additionally shown, with which front and rear lattice 42, 44 are
positively held together.
[0052] While at least one exemplary embodiment has been presented
in the foregoing summary and detailed description, it should be
appreciated that a vast number of variations exist. It should also
be appreciated that the exemplary embodiment or exemplary
embodiments are only examples, and are not intended to limit the
scope, applicability, or configuration in any way. Rather, the
foregoing summary and detailed description will provide those
skilled in the art with a convenient road map for implementing an
exemplary embodiment, it being understood that various changes may
be made in the function and arrangement of elements described in an
exemplary embodiment without departing from the scope as set forth
in the appended claims and their legal equivalents.
* * * * *