U.S. patent application number 11/702931 was filed with the patent office on 2007-08-30 for heating, ventilation and/or air-conditioning unit designed to accommodate a cartridge for the treatment of air by diffusion of a volatile treating agent.
This patent application is currently assigned to Valeo Systemes Thermiques S.A.S.. Invention is credited to Gilles Elliot, Frederic Giraud, Frederic Ladrech.
Application Number | 20070202799 11/702931 |
Document ID | / |
Family ID | 37232967 |
Filed Date | 2007-08-30 |
United States Patent
Application |
20070202799 |
Kind Code |
A1 |
Giraud; Frederic ; et
al. |
August 30, 2007 |
Heating, ventilation and/or air-conditioning unit designed to
accommodate a cartridge for the treatment of air by diffusion of a
volatile treating agent
Abstract
The subject of the invention is a heating, ventilation and/or
air-conditioning unit, especially for a vehicle, which is equipped
with means for treating the air by diffusion of a volatile agent.
This unit comprises a wall (2) bounding an air circuit (8), this
wall (2) having an opening (7) therethrough for the passage of a
treatment cartridge (1). A permeable partition (10) defines a
diffusion chamber (11) for the volatile agent, this partition (10)
being placed in the internal volume of the air circuit (8).
Inventors: |
Giraud; Frederic; (Le Perray
en Yvelines, FR) ; Ladrech; Frederic; (Maurepas,
FR) ; Elliot; Gilles; (Courcouronnes, FR) |
Correspondence
Address: |
Valeo Climate Control Corp.;Intellectual Property Dept.
4100 North Atlantic Boulevard
Auburn Hills
MI
48326
US
|
Assignee: |
Valeo Systemes Thermiques
S.A.S.
8, rue Louis-Lormand-La Verriere
Le Mesnil St Denis
FR
78320
|
Family ID: |
37232967 |
Appl. No.: |
11/702931 |
Filed: |
February 6, 2007 |
Current U.S.
Class: |
454/290 |
Current CPC
Class: |
A61L 9/12 20130101; B60H
3/0021 20130101; F24F 8/50 20210101; B60H 3/0007 20130101; B60H
2003/0057 20130101 |
Class at
Publication: |
454/290 |
International
Class: |
F24F 13/08 20060101
F24F013/08 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 8, 2006 |
FR |
06 01127 |
Claims
1. Heating, ventilation and/or air-conditioning unit comprising an
air circuit (8) between at least one inlet vent and at least one
outlet vent, this air circuit (8) being bounded by an
air-impermeable volume bounded by a wall (2) that includes at least
one opening (7) for the passage therethrough of a cartridge (1) for
treating the air by diffusion of a volatile treating agent,
characterized in that a permeable partition (10) defining a chamber
(11) for diffusion of the volatile agent is placed in the internal
volume of the air circuit (8).
2. Unit according to claim 1, characterized in that, when the
opening (7) is provided through the wall (2) along an axis
transverse to the direction of the air flow inside the circuit (8),
the partition (10) lies in the extension of the opening (7) in the
wall (2).
3. Unit according to claim 1, characterized in that, when the
opening (7) is provided through the wall (2) along an axis
corresponding to the direction of air flow inside the circuit (8),
the partition (10) lies transversely to the axis of the opening
(7).
4. Unit according to any one of the preceding claims, characterized
in that the partition (10) is at least partly provided on the
cartridge (1).
5. Unit according to any one of claims 1 to 3, characterized in
that the partition (10) is provided at least partly on the wall of
the air circuit (8).
6. Unit according to claim 5, characterized in that it does not
matter whether the partition (10) is attached to and/or integrally
molded with the wall (2) of the air circuit (8) in order to form a
unitary part.
7. Unit according to claim 4, characterized in that it does not
matter whether the partition (10) is attached to and/or integrally
molded with a support (3) for the cartridge (1) in order to form a
unitary part.
8. Unit according to any one of the preceding claims, characterized
in that the partition (10) is interposed between a substrate (4) of
the cartridge (1) and the volume in which air flows through the
circuit (8), the diffusion chamber (11) forming a housing for
accommodating the substrate (4).
9. Unit according to claim 8, characterized in that a receptacle
for accommodating the substrate (4) is removeably attached to the
support (3), the wall of this receptacle constituting said
permeable partition (10).
10. Unit according to any one of the preceding claims,
characterized in that the cartridge (1) is fitted into the wall of
a module (28) that houses at least air heat treatment means (30,
31).
11. Unit according to any one of the preceding claims,
characterized in that the cartridge (1) is fitted into the wall of
a duct (26, 35) that is located upstream and/or downstream of a
module (28) that houses at least air heat treatment means (30,
31).
12. Unit according to any one of the preceding claims,
characterized in that the cartridge (1) is an interchangeable
removable cartridge provided with means for reversibly fastening it
to the wall (2).
13. Unit according to any one of the preceding claims,
characterized in that the cartridge (1) is equipped with reversible
means for joining it between a support (3) and a substrate (4), the
latter being interchangeable.
Description
TECHNICAL FIELD OF THE INVENTION
[0001] The invention relates to the field of heating, ventilation
and/or air-conditioning units, especially for vehicle passenger
compartments. The subject of the invention is such a unit, which is
designed to accommodate a device for treating the air that flows
through it, by diffusion of a volatile treating agent to prevent
growth of microorganisms.
PRIOR ART
[0002] It will be recalled that a heating, ventilation and/or
air-conditioning unit for a motor vehicle comprises an air circuit
between at least one intake vent and at least one discharge vent,
various air treatment means being interposed in said circuit. This
air intake vent is an external air inlet and/or a recycled air
inlet. The means are for example blowing means, for making a stream
of air move through the circuit, means for heating and/or cooling
the air, and means for purifying the air, such as by particle
filtration, by ionization, by photocatalysis or the like. Known
from among these treatment means are those employing a volatile
treating agent. The treating agent is customarily a product in
liquid or gelled form supported by a substrate and intended to
prevent the growth of microorganisms, so as to counteract the
unpleasant smells that are a source of discomfort to passengers.
Such microorganisms grow more particularly in the area of an
evaporator that the unit includes. This treating agent therefore
has antiseptic properties.
[0003] The problem that arises is how to incorporate into the
circuit means for treating the blown air by diffusion of a volatile
agent.
[0004] Such an incorporation must not be effected to the detriment
of the overall size of the unit, which is desired to be as small as
possible, nor must it be a source of an appreciable overcost. Again
as regards costs, it is desirable to organize this incorporation so
as to allow easy maintenance of the treatment means, especially by
facilitating access to them, in order to replace the carrier
substrate for the treating agent, or even to replace the treating
agent itself when it is exhausted. Again as regards costs, this
incorporation must not compromise standardization of the unit,
which it is desirable to organize so as to be able to be
integrated, without major modifications, into any vehicle and more
particularly into vehicles of any platform of one manufacturer and
into vehicles of different manufacturers so as to optimize the
cost-effectiveness of the effort in designing the unit.
[0005] Moreover, the diffusion of the treating agent into the
stream must be uniform and reliable, and in a quantity suitable for
providing satisfactory and long-lasting treatment.
[0006] It has been proposed in DE 10 346 182 (Behr GmbH & Co
Kg) to have the treatment means in a container for the treating
agent, said container being placed inside the air circuit.
Replenishment of the treating agent is accomplished via a channel
that connects the container to the outside of the circuit. Such
arrangements are tricky to implement and are neither satisfactory
as regards air flow pressure drops or as regards standardization of
the unit.
[0007] It has also been proposed, in JP 2004210087 (Zexel Valeo
Climate Control Corp.), to design the treatment means as a
cartridge fastened to one wall of the air circuit. This cartridge
is formed from a support, which includes a housing for
accommodating the substrate, said cartridge being provided with
means for fastening it to the external face of a bounding wall of
the circuit. This wall includes, in its thickness, a cavity which
may or may not open onto the internal volume of the air circuit,
for accommodating part of the cartridge, including the housing for
accommodating the substrate. However, ways of making the treating
agent diffuse deserve to be improved so as to provide a uniform,
reliable and long-lasting treatment of the air blown by the
circuit. In other words, the arrangement of the cartridge in JP
2004210087 does not provide a satisfactory exchange surface. It
should be recalled in this regard that the cartridge or treating
agent is in operation even when the blower is stopped, that is to
say when there is little or no movement of air in the unit. This is
why the surface for exchange with this volume of stationary air
assumes major importance. Moreover, it should be noted that the
space available in an air-conditioning module is limited so that
the incorporation of the treatment agent cartridge lying in the
same plane as the wall of the unit is practically impossible if it
is desired to maintain satisfactory diffusion for a very long
period, for example a year.
SUBJECT OF THE INVENTION
[0008] The object of the present invention is to propose a heating,
ventilation and/or air-conditioning unit, especially for a vehicle,
designed to accommodate a device for the treatment of air flowing
through it by diffusion of a volatile treating agent. More
particularly, the aim of the present invention is to propose such a
unit in which the ways of incorporating the treatment means, for
treating air by diffusion of a volatile agent, allow the treatment
means to be easily and inexpensively replenished after the volatile
agent has become exhausted, allow uniform diffusion of said
volatile agent in sufficient quantity and allow such an
incorporation to be made at any point in the air circuit of the
unit without compromising either the quality of the treatment
obtained or the standardization of the unit, and without incurring
an appreciable overcost.
[0009] The unit of the present invention is a heating, ventilation
and/or air conditioning unit. This comprises an air circuit between
at least one inlet vent and at least one outlet vent. This air
circuit defines a volume impermeable to the air of the external
environment, this volume being bounded by a wall. This wall can be
one wall of a duct or a module that houses means for treating the
air, especially heat treatment means. The unit is equipped with
means for treating the air by diffusion of a volatile agent, said
means being placed in the air circuit so as to purify the air and
in particular prevent the growth of microorganisms. More
particularly, the unit is of the kind in which the wall bounding
the air circuit includes at least one opening for the passage
therethrough of a cartridge for treating the air by the emission of
a volatile treating agent. This cartridge is of the type comprising
a support for a substrate impregnated with the volatile agent.
[0010] According to the present invention, such a unit is
principally recognizable in that a permeable partition defining a
chamber for diffusion of the volatile agent is placed in the
internal volume of the air circuit. The expression "placed in the
internal volume" is understood to mean that the permeable partition
extends beyond the thickness of the wall of the unit so as to
emerge in the internal volume of this unit. It will therefore be
understood that this wall includes an emitting surface or partition
in contact with the air in at least two mutually intersecting
planes.
[0011] These arrangements are such that the treating agent is
capable of occupying the internal volume of the chamber located in
the air circuit bounded by the wall and of diffusing through the
partition into the air circuit. The overall surface of the
partition offers both the capability of the treating agent
diffusing into the circuit in sufficient quantity and of this
diffusion being controlled according to the desired daily
amount.
[0012] A direct communication space is especially provided between
the substrate and the partition for diffusion of the treating agent
into the chamber. This space within which the volatile agent
expands prior to its diffusion through the permeable partition may
be formed by a peripheral region of the diffusion chamber which is
provided around the substrate housed at least partly inside this
diffusion chamber. This space may also be formed by at least part
of the diffusion chamber, especially the distal part, if not by the
entire volume of the diffusion chamber if the substrate is placed
outside this volume.
[0013] More particularly, the partition is preferably interposed
between the substrate and the volume for flow of the air through
the circuit, the diffusion chamber forming a housing for
accommodating the substrate.
[0014] According to an alternative embodiment in which the opening
is made through the wall along an axis transverse to the direction
of flow of the air inside the circuit, the partition lies more
particularly as an extension in the vicinity of the periphery of
the opening in the wall for passage of the cartridge. It will
therefore be understood that the cartridge extends approximately
perpendicular to the direction of flow of the air stream.
[0015] According to various embodiments, the partition is provided
at least partly on the cartridge, if not completely, or the
partition is at least partly provided on the wall of the air
circuit, if not completely. The partition can be formed from
elementary partitions provided on the cartridge and on the wall
respectively. According to various exemplary embodiments, it does
not matter whether the partition or the elementary partitions are
attached to and/or integrally molded with the wall of the air
circuit or the support for the cartridge, according to the cases
mentioned above, in order to form a unitary part with these.
According to one embodiment, the permeable partition is that of a
removable receptacle of the housing for the substrate, which is
attached to the support via reversible accommodation means, such as
by interlocking, clip-fastening or stapling or by the use of
cooperating assembly members, such as by screwing. For example,
this support includes a cradle or the like for accommodating the
receptacle by interlocking.
[0016] According to various ways of incorporating the cartridge,
this is for example fitted into the wall of a module housing at
least air heat treatment means or else it is fitted into the wall
of a duct located upstream of such a module or else is fitted into
the wall of a duct located downstream of such a module. The meaning
of the terms "upstream" and "downstream" relates to the direction
of flow of the air stream inside the unit.
[0017] Of course, several cartridges may be fitted at any
respective point in the air circuit and more particularly into the
wall of any duct or module. This is because, and without departing
from the scope of the invention, the cartridge may be fitted into
the air inlet module of the unit, in or alongside the blower or in
the duct for feeding air to the module containing the heat
exchangers.
[0018] Likewise, the cartridge may be fitted into an ancillary air
feed circuit.
[0019] According to various embodiments, the cartridge is an
interchangeable removable cartridge provided with means for
reversibly fastening it to the wall or else is a cartridge that is
equipped with reversible means for joining it between the support
and the substrate, the latter being interchangeable, or else that
is provided with means for recharging the substrate with the
volatile agent. It is apparent that replenishment of the treating
agent can be effected by replacing the cartridge and/or the
substrate and/or by recharging the substrate with treating
agent.
[0020] More particularly, the means for fastening the cartridge to
the wall may be irreversible fastening means, such as adhesive
bonding, soldering or welding, integrally molding the support to
the wall, or a similar technique, for example. According to another
embodiment, the means for fastening the cartridge to the wall may
be reversible fastening means, such as by interlocking, by
clip-fastening, by screwing, by means of cooperating assembly
members or similar techniques, for example.
[0021] The joining means between the support and the substrate may
be irreversible joining means, such as by adhesive bonding or a
similar technique. According to another embodiment, the joining
means between the support and the substrate may be reversible
joining means, such as by interlocking, by clip-fastening, by means
of cooperating assembly members or similar techniques for example.
According to yet another embodiment, the joining means between the
support and the substrate are formed from said receptacle for
accommodating the substrate, which is attached to the support, the
wall of this receptacle constituting said permeable partition.
[0022] Preferably, the substrate is a spongy cohesive body. These
arrangements allow the cartridge to be incorporated into the wall
in any orientation, without affecting the natural behavior of the
substrate.
[0023] It should be noted that the treating agent may also be an
odorizing agent.
[0024] The present invention will be better understood on reading
the following description of exemplary embodiments, in conjunction
with the figures of the appended drawings, in which:
[0025] FIG. 1 is a diagram illustrating a first exemplary
embodiment of treatment means with which a heating, ventilation
and/or air-conditioning unit is equipped in order to treat the air
blown through this unit with a volatile agent;
[0026] FIG. 2 is a diagram illustrating a second exemplary
embodiment of treatment means similar to those shown in FIG. 1;
[0027] FIGS. 3 and 4 are diagrams illustrating a third exemplary
embodiment of treatment means similar to those shown in FIGS. 1 and
2, in longitudinal section and in cross section respectively;
[0028] FIG. 5 is a diagram illustrating a fourth exemplary
embodiment of treatment means similar to those shown in the
previous figures;
[0029] FIGS. 6 to 10 are illustrations of various examples of the
incorporation of a cartridge into a wall of the unit, said
cartridge comprising the treatment means shown in the previous
figures, shown on end and in longitudinal section in each of these
figures;
[0030] FIG. 11 is another example of the incorporation of a
cartridge into a wall of the unit, shown in longitudinal section;
and
[0031] FIG. 12 is a diagram illustrating various points of
incorporation of the treatment means of the invention into a wall
of an air circuit of a heating, ventilation and/or air-conditioning
unit for a motor vehicle.
[0032] In FIGS. 1 to 4, means are provided for equipping a heating,
ventilation and/or air-conditioning unit of a motor vehicle for
treating the air blown through this unit in order to prevent the
growth of microorganisms. Such means employ a volatile treating
agent that diffuses an active and antiseptic substance into the
volume bounded by the air circuit of the unit. This treating agent
may incidentally be mixed with an odorizing substance. It is also
conceivable to replace the treating agent with an odorizing
substance or the like, so as to limit the action of the treatment
means to odorizing the air blown by the unit.
[0033] These treatment means comprise a cartridge 1 designed to be
fitted into a wall 2 of the unit. This cartridge 1 comprises a
support 3 for a substrate 4 impregnated with the volatile treating
agent. The substrate 4 consists for example of a permeable sachet
or the like containing the treating agent in a liquid or gel state.
However, the substrate 4 is preferably a spongy cohesive body,
otherwise called a wick, advantageously consisting of a mass that
can be formed from a textile material, such as mingled textile
fibers, whether natural or artificial, from a mass of cellulose,
such as a thick pad of blotting paper of the type formed from a
strip or coupon, from a body formed from a mineral or plant-based
substrate, optionally parceled and compressed, from a cohesive mass
of polymer powder, or from an animal-derived material, such as
porous leather. Such an organization of the substrate 4 in the form
of a cohesive body gives it a natural strength allowing it to be
fitted into the unit in any orientation, especially with respect to
gravity. The treating agent is for example allyl isothiocyanate or
a similar substance, in the liquid or gelled state.
[0034] The substrate 4 is attached to the support 3 in a removable
or irreversible manner. For example, the substrate 4 may be fitted
into a housing 6 contained in the support 3, being preferably but
subsidiarily bonded to the inside of this housing 6 as shown in
FIGS. 1 to 4. In FIG. 5, the substrate 4 is fastened, such as by
adhesive bonding or the like, to one face of the support 3, this
face being turned toward the wall 2 of the unit.
[0035] The wall 2 of the unit includes an opening 7 for passage
therethrough of the substrate 4 carried by the support 3. This
opening 7 opens both to the outside of the air circuit 8 of the
unit, the volume of which is bounded by the wall 2, and to the
inside of the air circuit 8. These arrangements are aimed at
allowing the cartridge 1 to be easily fitted into the wall 2, while
leaving the possibility of the treating agent diffusing
substantially into the air circuit 8 when the stream of air
stops.
[0036] The cartridge 1 is fastened to the wall 2 by fastening
means, such as by means of screws 9, or by interlocking in the
exemplary embodiments illustrated in FIGS. 1 to 5. Such
arrangements not only allow easy incorporation of the cartridge 1
into the unit but also the ability to easily replenish the treating
agent after it has been exhausted, either by replacing the
cartridge 1 or by replacing the substrate 4 or by recharging the
substrate 4 with the treating agent.
[0037] To regulate the diffusion of the treating agent into the air
circuit 8 in sufficient quantity without correspondingly increasing
the size of the opening 7 made through the wall 2, a permeable
partition 10 is interposed between the substrate 4 and the internal
volume bounding the air circuit 8.
[0038] In FIG. 1 it should be noted that the partition 10 or
emitting surface forms an integral part of the support 3 and is
molded in common therewith. The support 3 and the partition 10 form
a unitary assembly. In contrast, FIG. 2 shows a removable partition
10, which may either be fastened to the inner face of the wall 2 or
to the peripheral wall of the receptacle 6.
[0039] FIGS. 3 to 5 bring out the difference between FIGS. 1 and 2.
Specifically, the emitting partition 10 forms part of the wall 2,
either by forming a cavity in the form of a "U" open to the
external environment, or by forming a substantially tubular cavity
on the internal face of the wall 2 of the unit.
[0040] This partition 10 defines a diffusion chamber 11 for the
treating agent, which is located inside the air circuit 8. This
results in diffusion of the treating agent into the air circuit 8
through a diffusion surface substantially greater in area than that
offered by just the surface of the opening 7. Furthermore, it is
easy to adjust this diffusion by modifying the intrinsic
characteristics of the permeable partition 10, such as its
thickness, its dimensions and its area, or its constituent
material. As an indication and according to a preferred embodiment,
the permeable partition 10 is formed from a plastic, such as for
example of the polypropylene type, possibly filled with talc in a
proportion of between 0% and 40%, more particularly around 20%,
especially for a partition thickness of between 0.5 mm and 2 mm. By
way of indication, and for example, the permeable partition 10 has
a thickness of around 0.9 mm.+-.20% or an overall area of 4200
mm.sup.2.+-.10%. For such an arrangement of the chamber 11 bounded
by the permeable partition 10, the annual diffusion of the treating
agent is around 45 mg/day at a constant temperature of 40.degree.
C. It will be appreciated that these indications regarding the
dimensions and constituent material of the permeable partition 10,
and the diffusion of the treating agent, may be modified without
thereby departing from the scope of the invention.
[0041] In FIGS. 1 to 4, the substrate 4 is extended beyond the
support 3 so as to be placed in the volume bounded by the wall 2.
In this case, the substrate 4 is housed inside the diffusion
chamber 11. Preferably, a space is provided around the substrate 4,
between the latter and the permeable partition 10, to allow the
treating agent to diffuse into the chamber 11 before it diffuses
through the permeable partition 10 into the air circuit. In FIG. 5,
the substrate 4 occupies a space that does not fill the internal
air circulation volume bounded by the wall 2. The treating agent
diffuses into the chamber 11 bounded by the permeable partition 10
before it diffuses through the latter into the air circuit 8.
[0042] In FIGS. 6 to 10, the substrate 4 is attached to the support
3 by means of a receptacle containing the substrate 4. The wall of
this receptacle constitutes the permeable partition 10.
[0043] In a first variant illustrated in FIG. 6 and FIGS. 8 to 10,
this receptacle is irreversibly attached to the support 3 by
adhesive bonding.
[0044] In the variant illustrated in FIG. 7, the support comprises
a cradle 22 for accommodating a receptacle 23 containing the
substrate 4. This cradle may be apertured so as to expose a large
portion of the wall of the receptacle 23 for substantial emission
into the circuit 8.
[0045] In FIGS. 6 and 7, the means for fastening the cartridge 1 to
the wall 2 comprise an interlocking pin 12 provided on a tab 13
that forms part of the cartridge 1. A quarter-lugged connection
device 14 advantageously supplements the fastening of the cartridge
1 to the wall 2.
[0046] In FIG. 8, the means for fastening the cartridge 1 to the
wall 2 are of the screwing type and comprise a screw 15 that passes
through a tab 16 that forms part of the cartridge 1 and which
cooperates with a tap hole that forms part of the wall 2.
[0047] In FIG. 9, the means for fastening the cartridge 1 to the
wall 2 are of the screwing type and comprises an external thread 17
provided on the support 3, which cooperates with a complementary
internal thread provided in the opening 7.
[0048] In FIG. 10, the means for fastening the cartridge 1 to the
wall 2 are of the clip-fastening type, which combine a tab 18
provided with at least one passage for at least one lug 19. It does
not matter whether the tab 18 and the lug 19 are on the cartridge 1
and/or the wall 2 respectively. In the exemplary embodiment
illustrated, the cartridge 1 is provided with the tab 18 and
cooperates with the lug 19 provided on the wall 2.
[0049] In FIG. 11, the cartridge 1 is fitted into the outlet 20 of
a duct that forms part of the air circuit (visible in FIG. 12 with
a duct reference 35 or 35'). In this case, it will be understood
that the opening 7 in the wall 2 is formed by said outlet 20.
According to various alternative embodiments, the means for
fastening the cartridge 1 to the wall 2 are of the type operating
by clip-fastening, by stapling or by resilient pinching of the wall
2 between two opposing bearing members of the cartridge 1. In the
exemplary embodiment illustrated, the fastening means comprise a
staple 21 for keeping the cartridge 1 in place on the wall 2
bordering the outlet 20 of the duct.
[0050] In FIG. 12, a heating, ventilation and/or air-conditioning
unit, especially for a vehicle, comprises the air circuit 8 between
at least one inlet vent 24 through which air is admitted. This
inlet vent is the inlet for external air or the inlet for recycled
air. This unit comprises a plurality of outlet vents 25 intended
for aerating specific regions of the passenger compartment, or even
of a seat or another member of the vehicle. In the schematic
exemplary embodiment illustrated, the air circuit 8 comprises
especially a duct 26 for supplying air to a heat treatment assembly
27, which comprises a module 28 housing air heat treatment and/or
purification means, and a plurality of ducts 29 for discharging the
treated air from the module 28 into the regions and/or members to
be aerated.
[0051] For example, the module 28 houses heat-transferring members
for heat treating the air, such as an evaporator 30 and at least
one heat sink 31. The module 28 also houses at least one
particulate filter 32 or the like for purifying the air. This
filter 32 is based downstream of a blower 33 that generates a
stream of air in the circuit 8. Flaps 34, 34' for distributing the
airstream inside the module 28 allow the air to be directed toward
at least one or other of the heat-transfer members 30, 31. The air
circuit, and especially the module 28, is also capable of housing
other air treatment members without departing from the scope of the
invention, such as an ionizer, a photocatalytic treatment device,
an electrostatic precipitation treatment device and/or any other
air treatment device. The organization and arrangement of the
members housed in the module 28 have been illustrated as an
example, and may be modified without departing from the scope of
the invention.
[0052] The cartridge may be easily incorporated into the air
circuit at any point therein, indicated by the various arrows A.
This point of incorporation may be located upstream of the heat
treatment assembly 27, in the region of the supply duct 26, or in
the module 28, preferably upstream of the evaporator 30, or else in
the discharge ducts 29. It should be noted that the preferred
places for incorporating the cartridge are located in the easily
accessible regions of the unit so as to allow easy maintenance of
the means for treating the air by diffusion of the volatile agent
and especially with a view to replenishing these means with the
volatile agent when this has become exhausted. More particularly,
these regions are located upstream of the evaporator 30, in the air
inlet region and in the region of the particulate filter 32 or
similar air purification device. The cartridge may also be
incorporated downstream of a recycling flap 34' located upstream of
the blower 33.
[0053] The unit may also include ancillary circuits 35, 35' for
supplying secondary air, such as an air intake in the engine
compartment or an air intake in the passenger compartment, which is
located upstream and/or downstream of the heat treatment assembly
27. These ancillary circuits 35, 35' are ducts at the ends of which
a treating agent cartridge is fitted.
* * * * *