DE102007031323B4 - Seat ventilation device for a pad of a vehicle seat - Google Patents

Abstract

A seat ventilation device for a pad (14) of a vehicle seat (10), in particular an open passenger car, having a channel arrangement (34) arranged inside the pad (14) and having at least one air inlet channel (40; 62) with an associated air inlet opening (42) and at least one open air outlet duct (54; 64) with an associated air outlet opening (52), wherein the air outlet opening (52) of at least one open air outlet duct (54) in a covered by a seat cover (36) region of the pad (14) is arranged, characterized in that at least one open air inlet channel (48) is provided, the air inlet opening (46) of which is arranged in a region of the cushion (14) covered by the seat cover (36).

Description

The The invention relates to a seat ventilation device for a Upholstery of a vehicle seat of a motor vehicle, in particular a open passenger car, in the preamble of the claim 1 specified type. Furthermore, the invention relates to a vehicle seat, especially for an open passenger car, with a backrest cushion and with a Seat cushion pad.

From the not pre-published DE 10 2006 003 880 A1 a cushion for a vehicle seat is known, which comprises a cushion layer arrangement which is covered by a cushion cover and having an air-conducting cushion layer, in which air can enter via air inlets and from which the air can escape after flowing through air outlets. The air outlets are associated with air outlet openings, which are arranged in the region of the upholstery cover.

From the DE 196 28 698 C1 a vehicle seat with such a seat ventilation device is already known to be known. In each case, a channel arrangement is provided within the seat cushion cushion and the backrest cushion of the vehicle seat, which comprises as an essential part of a large-sized or a large flow channel forming ventilation layer, which is essentially formed by a spacer knitted fabric. The ventilation layer can be supplied with air via a plurality of air inlet ducts having respective air inlet openings, wherein in each case a mini-fan is arranged within the air inlet ducts. Furthermore, the channel arrangement comprises a plurality of air outlet channels with associated open air outlet openings, via which the air circulated through the ventilation layer and enriched with moisture of the seat occupant can escape from the cushion.

All in all Thus, a circulation system is created in which the air by means of respective miniature fans is transported into or through the ventilation layer before passing over the exhaust vents gets out of the upholstery out into the open again. During the flows through The ventilation layer is moisture or sweat of the seat occupant transported away, which by the seat cover of the upholstery and by a below this arranged, air and moisture-permeable cover layer in the area of the ventilation layer, from where it is transported away becomes.

at this known prior art are thus the air inlet ducts through respective miniature fans closed and the air outlet openings accordingly open, d. H. the air accelerated by the miniature fans passes after flowing through the ventilation layer automatically out of the ventilation layer. An alternative system for this provides that the air intake openings open and the air vents closed by miniature fans are formed, so that there the air flowing through the ventilation layer airflow is generated by a suction function of the miniature fan.

task The present invention is a seat ventilation device and a Vehicle seat of the aforementioned type to create, in which the air flow of the at least one air inlet opening and the at least one air outlet can be generated in a simple manner.

These The object is achieved by a Seat ventilation equipment and a vehicle seat with the features of claims 1 and 16 solved. Advantageous embodiments with appropriate and non-trivial developments of Invention are in the dependent claims specified.

Around a seat ventilation device to create, in which the air flow between the at least one Air inlet opening and the at least one air outlet opening, which is an open air outlet channel is assigned and in a covered by a seat cover Area of the pad is arranged to be generated particularly easily can, it is provided according to the invention, that at least one open air inlet duct is provided, whose Air inlet opening in a covered by a seat cover Area of the pad is arranged. In other words, is present a system is provided in which at least one open air inlet duct and at least one open air outlet passage are provided within which therefore no miniature fans are required to to circulate the air inside the cushion. Since thus the Air flow between said air inlet opening and said air outlet opening is not by means of a miniature fan, which operates either suction-based or pressure-based can be, according to the invention, the air inlet opening of the respective air intake duct in a covered by a seat cover Area of the upholstery arranged.

In this case, one makes use of the existing, for example, when driving open effect, namely that result due to the air flow around the motor vehicle air pressure differences between the area within the passenger compartment and the environment, which exert a suction effect on the respective pad of the vehicle seat. Thus, for example, in the footwell area in front of the seat cushion cushion corresponding negative pressure constellation, so that an air flow over the corresponding arranged air inlet openings enters the channel arrangement of the pad and exits through the air outlet openings from this.

It It can be seen, therefore, that a system can be created which both on the side of the air intake duct as well as on the part of Air outlet duct without miniature fan gets along and therefore each is open.

With In other words, both a seat ventilation device is conceivable in which completely can be dispensed miniature fan, as well as a solution, in which the described arrangement in support of miniature fans is used. The second variant can then be simplified accordingly be that a smaller number of miniature fans or smaller dimensioning miniature fans can be used.

One Particularly good circulating air foam can in particular in a open car over it Be achieved in that the channel arrangement a plurality of channels includes, which extend in the extension direction of the pad. The extension direction of the pad is in a seat cushion pad a passenger car to understand the vehicle longitudinal direction. at a backrest cushion This is to be understood as the course in the vehicle vertical direction.

In Further embodiment of the invention comprises the channel arrangement a plurality of channels, which run transversely to the extension direction of the pad. Consequently can - in Combination with the extending in the direction of extension of the pad channels - a grid pattern be created over which the moisture is superficial can be removed. Another advantage of such grid-like arrangement of the channels it is that these simply in a cushion part - for example, a foam part - introduced can be.

When Furthermore, it has been shown to be advantageous if the extension direction and the transversely extending to the extension direction channels at the top a cushion pad, in particular a foam pad, arranged and are open at the top. Such a design of the channels is particularly easy in the cushion pad, especially the foam pad, recoverable.

is the cushion support or the channels covered with an air and moisture permeable cover layer, so a cushion structure is created, which overall extremely simple can be produced or in which the channel arrangement to simple Way is closed at the top.

When In addition, it has been shown to be advantageous if at the front of a as a cushion pad cushion formed a plurality of covered the seat cover Air intake ports are provided. This allows a sufficiently large air flow get into the channel arrangement. The same applies in reverse for the Plurality of air outlet channels, which are arranged in a rear region of the seat cushion.

Further It is also advantageous if the air inlet openings in a middle front area are positioned so that the air is correspondingly in the air intake ducts can get. The middle front area has the advantage that this by the seat occupant or by his thighs not is covered, allowing a reliable air supply for the channel arrangement guaranteed can be.

In Another embodiment of the invention is at least one more open air inlet duct provided, the air inlet opening in Mounting position of the vehicle seat is arranged lower than the air outlet of the at least one air outlet duct. In addition, one makes oneself in addition to the above-described Sogeffekt the so-called chimney effect, that is the above the air inlet opening in the channel arrangement reaching air when flowing through accordingly heated until this is over the air outlet openings gets back into the open air. This heating causes an upgrade the warm air, the so-called chimney effect.

is at the bottom of a backrest cushion formed pad at least one front lower air inlet duct provided, which one extending in the direction of extension of the pad Channel is assigned, so is an easy way to let in Air created in the channel arrangement.

Of the Airflow passing through the ducting may be in one simple embodiment of the channel arrangement in a particularly favorable manner thereby leave the pad, which is the majority of the extension direction of the upholstery running channels the air outlet channels form.

Finally has it is shown to be advantageous if the at least one front upper or front lower air inlet duct and / or the at least one Air outlet duct of a perforated leather cover or one Covered fabric cover is. In the case of perforated leather cover can thus be on easy Way a cover are created, which is correspondingly permeable to air. This applies in just as much for the fabric cover, which needs no further perforations.

Further Advantages Features and details of the invention will become apparent the following description of a preferred embodiment as well as from the drawings; these show in:

1 a schematic side view of a designed as a roadster passenger cars with a seat cushion pad and a backrest cushion, which are equipped with a seat ventilation device for the removal of body moisture or sweat;

2 a schematic and partial sectional view through the pad of the seat cushion part or the backrest portion of the vehicle seat, wherein a channel arrangement is recognizable, which comprises at least one open air inlet duct and at least one open air outlet duct with a corresponding air inlet opening, which is arranged lower in the installed position of the vehicle seat as an air outlet and at least one open air outlet duct; and wherein via the at least one open air inlet channel, a plurality of extending in the extension direction and transverse to the extension direction of the pad channels below a seat cover and a cover layer to be supplied with air;

3 a schematic and partial plan view of the cut cushion shown along the line III-III in 2 wherein the one of a plurality of extending in the extension direction and transverse to the extension direction channel arrangement is recognizable on the upper side of a cushion pad, which have a grid-like basic structure;

4a and 4b each a schematic plan view of the seat cushion of the vehicle seat, which in 4a with an at least partially perforated leather and in 4b covered with a fabric cover, with front upper air inlet ducts and rear air outlet ducts are thematically indicated;

5 a schematic sectional view through the backrest cushion of the vehicle seat, which a channel arrangement analogous to the embodiment according to the 2 and 3 comprising, wherein at least one air inlet opening of an open air inlet channel is provided, which is arranged lower in the installation position of the vehicle seat as the air outlet opening of the at least one open air outlet channel at the top of the backrest cushion; and in

6 a schematic front view of the backrest cushion according to 5 In particular, front lower air inlet ducts and front upper air outlet ducts can be seen, which are covered by an at least locally perforated leather cover or a fabric cover.

In 1 is shown in a schematic side view of a trained as a roadster open passenger car with omitted driver's door. As a result, a driver-side vehicle seat 10 schematically recognizable.

In particular, when driving open arise in such an open passenger car with the arrows 12 illustrated air flows, which are due to differences in air pressure between the area inside the passenger compartment and the environment. As a result, in the present case, a suction effect of the vehicle flow, which in a manner which will be described in more detail hereinafter, has a positive effect on the discharge of air of a seat ventilation device of the vehicle seat 10 effect.

In 2 is a sectional and schematic sectional view of the basic structure of a pad 14 a seat cushion part 16 ( 1 ) recognizable. The construction of the upholstery 14 essentially also corresponds to that of a backrest part 18 ( 5 . 6 ).

The upholstery 14 includes a thick cushion pad 20 , in particular in the form of a foam pad, at its lower or rear side a support part 22 made of plastic is provided.

In synopsis with 3 which in a schematic and partial sectional view along the line III-III in 2 a plan view of the cushion pad 20 shows, it becomes apparent that within this a lattice structure 24 from the top of it 26 ago introduced. This grid structure 24 comprises several parallel to each other and in the extension direction of the pad 14 running channels 28 as well as several likewise mutually parallel and transverse to the direction of extension channels 30 , In the extension direction is in the case of the seat cushion part 16 to understand the vehicle longitudinal direction. In the case of the backrest part 18 is under the extension direction of the pad 14 to understand essentially the vehicle vertical direction.

The extending in the direction of extension channels 28 as well as the transverse to the extension direction channels 30 are in this case arranged approximately at right angles to each other. Likewise, of course, other basic arrangements would be conceivable. The individual channels 28 . 30 are doing so at the top 26 the cushion pad 20 arranged that they are open at the top. The individual channels are closed 28 . 30 through an air and moisture permeable cover layer 32 , which in this case, for example, from an Ab knitted fabric, a rubber hair or the like. Alternatively, a foam, in particular a reticulated foam material would be conceivable here. Other cover layers are also conceivable. Through the cover layer 32 thus becomes a channel arrangement 34 - consisting of the channels 28 and the channels 30 - bounded to one side. Out 2 is further recognizable that the upholstery 14 with a seat cover 36 is covered or covered, which will be discussed in more detail below.

In synopsis of 2 and 3 is recognizable that at some junctions 38 between the extension direction of the pad 14 and the direction transverse to the direction of extension of the pad 14 running channels 28 . 30 further air intake ducts 40 connect their air intake openings 42 from the carrier part 22 are omitted.

In the 4a and 4b is in each case in a schematic plan view formed as a seat cushion upholstery 14 of the seat cushion part 16 ( 1 ). It shows 4a a variant of the seat cushion part 16 in which the upholstery 14 is covered with a leather or synthetic leather. 4b shows an embodiment in which the pad 14 with an air-permeable fabric, z. B. a knitted fabric, based.

In particular from 4a it becomes apparent that in a middle front area 44 of the upholstery 14 of the seat cushion part 16 the seat cover made of leather or imitation leather 36 a coarser perforation, in which correspondingly large air inlet openings 46 are omitted. These air intake openings 46 form the front end of respective air intake ducts 48 , Which present by the extension direction of the seat cushion part 16 tapered channels 28 be formed. In other words, the channels are running 28 in the present embodiment forward to the middle front area 44 or to the inside of the seat cover 36 , Accordingly, in the present case, the cover layer 32 which on the channel arrangement 34 rests, in the area of the air inlet openings 46 correspondingly recessed or designed so that the air inlet ducts 48 immediately below the seat cover 36 to come to rest.

In a rear area 50 are a plurality of air outlet openings 52 in the seat cover 36 introduced, which respective Luftauslasskanälen 54 assigned. The air outlet ducts 54 are in the present case, in turn, extended by the corresponding rearward, in the direction of extension of the vehicle 14 running channels 28 educated. In other words, extend in the present embodiment in the extension direction of the pad 14 running channels 28 between the air intake openings 46 in the front area of the cushion 14 and the air outlet openings 52 in the back of the cushion 14 ,

In the embodiment according to 4b is a according to the embodiment according to 4a similar basic design of the upholstery 14 provided, however, are the air inlet openings 46 or the air outlet openings 52 the respective air intake ducts 48 or air outlet channels 54 completely covered by the air-permeable fabric. This air-permeable fabric still ensures that enough air in the channels 28 into - or can get out of these.

Based on 1 to 4b It is now clear that, especially in an open passenger car due to the prevailing pressure conditions, a flow through the pad 14 of the seat cushion part 16 can be achieved. That's how it is 1 recognizable that in particular in the footwell area a corresponding negative pressure constellation is created, so that an air flow through the air inlet openings 46 in the channel arrangement 34 enters and over the air outlet openings 52 exit from this. These air currents in the figures with the arrows 56 characterized. A special feature is, of course, that the air intake openings according to 4a - as well as according to 4b - in a middle front area 44 are positioned so that the air is correspondingly in the air intake ducts 48 or the channels 28 can get. The middle front area 44 has the advantage that it is not covered by the seat occupant or by its legs, so that a reliable air supply for the channel arrangement 34 can be guaranteed.

Both the air intake ducts 48 as well as the air outlet ducts 54 are designed to be open, so without a miniature fan. The air flow is therefore in particular due to the suction effect of the vehicle flow around. By the suction effect within the channel arrangement 34 It also causes air through the other air intake ducts 40 in the channel arrangement 34 arrives. This effect is further supported by the fact that the air inlet openings 42 the air intake ducts 40 below the corresponding air outlet openings 52 the air outlet ducts 54 are arranged. In addition to the above-described suction effect, one makes use of the so-called chimney effect, namely that via the air inlet openings 42 or the air inlet ducts 40 Air flowing into the duct assembly is heated as it flows through until it passes through the air outlet 52 gets back into the open air. This warming causes an increase of the warm air, the so-called chimney effect.

By running in the vehicle transverse direction channels 30 is achieved that a uniform ventilation below the at least approximately the entire seating surface of the pad 14 is reached. In the present embodiment, the channels extend 30 to the side cheeks 58 of the upholstery 14 ,

By the suction effect is thus achieved that the air according to the arrows 56 through the channel arrangement 34 passes and this moisture or sweat, which from the seat occupant over the seat cover 36 and the thick film 32 in the area of the channel arrangement 34 arrives, is transported away.

In the 5 and 6 is a schematic sectional view and a schematic front view of the backrest part 18 according to 1 shown. Because the basic structure of the upholstery 14 of the backrest part 18 to the one according to 2 to 4b is identical, analogous reference numerals continue to be used.

Out 5 is therefore apparent that in the present embodiment, the backrest part 18 a carrier part 22 or comprises a clamping part, which adjoins the front side of a cushion pad, which in turn at the top 26 or front side with a channel arrangement 34 is provided. Front of the channel arrangement 34 is again a cover layer 32 and a seat cover 36 in the form of a leather or imitation leather, or provided in the form of a fabric cover.

The channel arrangement 34 essentially again in the extension direction of the pad 14 - So essentially in the vehicle vertical direction - running channels 28 , which at their upper and lower end respective air inlet ducts 48 or air outlet channels 54 assigned. The air intake openings 46 or the air outlet openings 52 the air intake ducts 48 or air outlet channels 54 are in 6 shown. For this purpose, again correspondingly enlarged openings 46 within the present invention made of a leather or imitation leather seat cover 36 intended. With a fabric cover these separate openings are not necessary, but rather the fabric cover can cover the underlying openings.

Thus is off 6 in particular recognizable that the air inlet openings 46 or air outlet openings 52 the air intake ducts 48 or air outlet channels 54 or in the extension direction of the pad 14 running channels 28 at the front of the backrest part 18 enter or exit. The air intake openings 46 or air outlet openings 52 are in a middle area, ie within the side walls 60 arranged.

Furthermore, in particular 5 at least one more air intake duct 62 and another air outlet duct 64 recognizable, which towards the rear of the carrier part 22 project through. As a result, air enters the upholstery both from the front and from behind 14 of the backrest part 18 in and on the top of both the front and on the back of the headrest 66 out.

In particular from 1 It can be seen that due to the differences in air pressure in the passenger compartment a suction effect behind the backrest part 18 arises, which causes the air according to the arrows 56 the upholstery 14 of the backrest part 18 flows through. In addition, if appropriate, the chimney effect can also be utilized in the present case, namely through the air inlet opening of the air inlet channel 62 , which are below the air outlet openings of the air outlet duct 64 is provided. Which is in the channel arrangement 34 Warming air thus passes automatically due to their heating due to the aspiration to ascend the air outlet opening of the air outlet duct 64 ,

Another special feature in the present case is that of the channel arrangement 34 of the upholstery 14 of the seat cushion part 16 flowing through and over the air outlet openings 52 the seat cushion part 16 leaving air foam directly to at least one air inlet duct 62 can get from where from this even the backrest part 18 flows through.

All in all is thus apparent that in this case a cost-effective seat ventilation can be created can, in which on other electrical components such as miniature fans, control units or electrical can be waived. Likewise, it would also be conceivable that a plurality of miniature fans for support the suction effect or the chimney effect are used.

By providing a seat heating, the moving air can also be used in the winter for active seat heating, which gives a pleasant thermal comfort. Another advantage is that the present channel arrangement 34 claimed no significant space. In addition, there is a reduced seating component diversity.

When the vehicle is closed by the vehicle air conditioning also pressure differences in the passenger compartment, so it also to air currents within the cushion 14 will come, with additional thermal effects. Thus, the present seat ventilation device is readily usable even with closed vehicles.

Claims (16)

Seat ventilation device for a cushion ( 14 ) of a vehicle seat ( 10 ) in particular an open passenger car, with one inside the pad ( 14 ) arranged channel arrangement ( 34 ), which at least one air inlet duct ( 40 ; 62 ) with an associated air inlet opening ( 42 ) and at least one open air outlet duct ( 54 ; 64 ) with an associated air outlet opening ( 52 ), wherein the air outlet opening ( 52 ) of at least one open air outlet duct ( 54 ) in one through a seat cover ( 36 ) covered area of the pad ( 14 ), characterized in that at least one open air inlet duct ( 48 ) is provided, the air inlet opening ( 46 ) in one through the seat cover ( 36 ) covered area of the pad ( 14 ) is arranged. Seat ventilation device according to claim 1, characterized in that the channel arrangement ( 34 ) a plurality of channels ( 28 ), which in the direction of extension of the pad ( 14 ). Seat ventilation device according to claim 1 or 2, characterized in that the channel arrangement ( 34 ) a plurality of channels ( 30 ), which transverse to the extension direction of the pad ( 14 ). Seat ventilation device according to one of claims 1 to 3, characterized in that extending in the extension direction and the transverse to the extension direction channels ( 28 ; 30 ) at the top of a cushion pad ( 20 ), in particular a foam pad, are arranged and designed to be open at the top. Seat ventilation device according to claim 4, characterized in that the padding ( 20 ) or the channels ( 28 ; 30 ) with an air- and moisture-permeable cover layer ( 32 ) are covered. Seat ventilation device according to one of claims 1 to 5, characterized in that in a front region of a seat cushion pad ( 16 ) formed pad ( 14 ) a plurality of through the seat cover ( 36 ) covered air intake ducts ( 48 ) are provided. Seat ventilation device according to claim 6, characterized in that the air inlet ducts ( 48 ) in a middle front area ( 44 ) are arranged. Seat ventilation device according to one of claims 1 to 7, characterized in that in a rear area ( 50 ) one as a seat cushion cushion ( 16 ) formed pad ( 14 ) a plurality of through the seat cover ( 36 ) covered air outlet ducts ( 54 ) are provided. Seat ventilation device according to one of claims 1 to 8, characterized in that in a lower region of a backrest cushion ( 18 ) formed pad ( 14 ) a plurality of through the seat cover ( 36 ) covered air intake ducts ( 48 ) are provided. Seat ventilation device according to one of claims 1 to 9, characterized in that in an upper region of a backrest cushion ( 18 ) formed pad ( 14 ) a plurality of through the seat cover ( 36 ) covered air outlet ducts ( 54 ) are provided. Seat ventilation device according to one of claims 6 to 10, characterized in that the air inlet ducts ( 48 ) or the air outlet channels ( 54 ) in each case in an extension direction of the pad ( 14 ) running channel ( 28 ) assigned. Seat ventilation device according to one of claims 1 to 11, characterized in that at least one further open air inlet duct ( 40 ; 48 ; 62 ) is provided, the air inlet opening ( 42 ; 46 ) in installation position of the vehicle seat ( 10 ) is arranged lower than the air outlet opening ( 52 ) of the at least one air outlet channel ( 54 ; 64 ). Seat ventilation device according to one of claims 1 to 4, characterized in that the channel arrangement ( 34 ) a plurality of open further air intake passages ( 40 ), which at nodes ( 38 ) of extending in the direction of extension or from transverse to the direction of extension channels ( 28 ; 30 ) connect. Seat ventilation device according to one of claims 1 to 13, characterized in that the at least one air inlet duct ( 48 ) and / or the at least one air outlet duct ( 54 ) are covered by a perforated leather cover. Seat ventilation device according to one of claims 1 to 13, characterized in that the at least one air inlet duct ( 48 ) and / or the at least one air outlet duct ( 54 ) are covered by a fabric cover. Vehicle seat ( 10 ), in particular for an open passenger car, with a backrest cushion ( 18 ) and with a cushion pad ( 16 ), characterized in that at least one of the pads ( 14 ) has a seat ventilation device according to one of the claims 1 to 15.