SE526854C2 - Arrangement for ventilation of a vehicle seat - Google Patents

Abstract

The invention relates to an arrangement for ventilation of a vehicle seat, which arrangement comprises an air-distributing material and an electric heating element comprising at least one electrically conductive component arranged in a pattern in conjunction with at least one support, where the vehicle seat comprises a bottom part which is adapted for ventilation by blowing air in or sucking air out via at least one passage through the bottom part and on through the said air-distributing material. According to the invention, the said support, heating element and air-distributing material are manufactured as an integrated arrangement adapted for mounting in conjunction with the said vehicle seat, the said air-distributing material being designed as at least one unit which is dimensioned for mounting in a correspondingly designed cutout in the vehicle seat. By means of the invention, an improved arrangement for heating and ventilation of a seat in a vehicle is obtained.

Description

00 0000 00 0000 00 0000 00 gc 0 0 0 0 0 0 O 0 0 0 c 0 I 0 0 0 0 0 0 I 00 nu 00 10 15 20 25 30 526 this way an arrangement where the electrically conductive wires are i xcerated in a desired configuration, so that, for example, unwanted wiring patterns and any electrical short circuit can be prevented. Because the heating element is connected to a power supply unit that supplies power, the heating element can be heated to a suitable temperature.

Both the driver's seat and other vehicle seats can also be set up so that they can be cooled down with supplied blown air, which in turn is cooled by means of a special cooling device, e.g. in the form of a so-called Peltier element. However, in some cases it can be more comfortable and efficient with ventilation through air that is sucked from the person sitting in the seat, which air is further led down through the seat. In this case no special cooling device is used. Ventilation of seats in vehicles can thus be realized with devices for both blowing in and extracting air.

Today's seats are normally made by so - called cold foaming, which is a previously known manufacturing method for the production of soft, elastic foam plastic.

The material for the pre-cast part that is used as a seat part and a backrest part, respectively, is called comfort foam. Preferably, the shaping tool used in the cold foaming process is designed so that so-called ditches arise in the comfort foam during its casting. These ditches are relatively narrow depressions in the comfort foam. whereby so-called tenar, i.e. thin shaped metal rods on holding fasteners arranged at the bottom of each ditch. This arrangement of the underside of the upholstery, is used for cooperating purposes for fastening the upholstery, which is lowered into the ditches and there fastened with the help of the toes. In this way, the upholstery is fastened to the seat part.

The blown or extracted air is distributed via one or more openings made in the comfort foam. This opening has a certain depth and a certain shape, for example circular or square. The opening communicates with a fl genuine which is suitably located on the underside of the respective seat and which can then be arranged to blow in or suck out air via at least one duct made in the comfort foam. For the case of blowing air, said cooling element may be 10 15 20 25 30 s 2 6 s s 4 0 0 000000 0 O 000 00 I 00 I 0 0 0 00000 0 placed before or after said fl marriage. The opening, like the ditches, is preferably formed in the foam of the seat in that the shaping tool used in the cold foaming process is designed so that said opening occurs in the comfort foam during its casting. Above the opening, possibly covering the entire seat part, a lu fl distributing material is applied which preferably has a ponous wire structure and is made of relatively thin som bricks which are relatively sparsely placed in an asymmetrical three-dimensional net structure so that a distribution of air supplied is measured. This air-distributing material is not significantly compressed when someone sits in the chair, so its function is then not significantly affected in this condition. The air-distributing material further allows air-desolation both along and across the main extent of the seat part, as well as air-desolation in the intermediate directions. A similar structure can also apply to the seat backrest part.

When mounting a vehicle seat, an air-distributing material as above is thus applied to the comfort foam so that the air-distributing material at least covers the opening or openings present in the comfort foam. A heating loop is applied on top of the air-distributing material, preferably one whose wires are placed between two protective material screens as described above. A suitable upholstery is then attached to the seat.

Additional upholstery material may be inserted between the upholstery and the heating coil.

A particular circumstance which may be a problem is that the above-mentioned type of seats comprise a number of layers of material between the comfort foam and the upholstery in order to achieve the desired functions of efficient ventilation and efficient upwelling. This in turn can lead to a time-consuming and costly manufacturing procedure and a high price of the finished product.

US 6003950 discloses a ventilation system in a vehicle seat. The air is sucked into a duct in the seat through the seat cover by means of a fl genuine. The seat cover consists of an outer and an inner layer. The air also passes through a layer of electric heating wires placed on a perforated plastic material and further an underlying additional layer of air-distributing material.

Furthermore, the patent document US 6064037 shows a device for use in heating a vehicle seat. The device comprises an air-distributing material and a heating element which are arranged together.

The mentioned document shows how a number of different layers are used in the seat structure to obtain the desired functions of efficient ventilation and efficient heating.

A particular problem that exists in connection with heated and ventilated vehicle seats is the need to provide a cost-effective and compact delivery unit intended for mounting in a seat in connection with the manufacture of a vehicle.

REVIEW OF THE DISCLAIMER; A main object of the present invention is to provide an improved seat structure in which the above-mentioned problems are solved, in particular in which the number of constituent layers is reduced (relative to the prior art) while retaining functionality.

This object is achieved with a device according to the following claim 1, i.e. a device as described in the introduction, which is characterized in that said carrier, heating element and air-distributing material are manufactured as an integrated device arranged for mounting in connection with said vehicle seat, said air distributor material is designed as at least one unit dimensioned for mounting in a correspondingly designed recess in the vehicle seat.

Examples of advantages achieved with the present invention are a cost-effective manufacture and a simpler construction of a vehicle seat compared with prior art. A particular advantage of the invention is that it can be implemented in the form of a single delivery unit that contains all the parts required for installation in a seat, i.e. a heating element, a suitably designed air-distributing material and a carrier for these 5 components. This provides a complete, integrated delivery unit that can be mounted in a seat during a vehicle manufacturing process. An additional advantage of the invention is that this integrated delivery unit can be attached to the top of a seat in a simple and efficient manner. FIGURE DESCRIPTION: The invention will be described in the following in connection with preferred embodiments and the accompanying diagrams, in which Figure 1 is a perspective view of a vehicle seat according to the invention; Figure 2 is a perspective view of the seat portion of a vehicle seat; Figure 3 is a perspective view of a guard loop intended for a vehicle seat; Figure 4 is a partially sectioned perspective view of the seat part of a vehicle seat according to a first embodiment of the invention; Figure 5 is a sectional view of the seat portion of a vehicle seat; Figure 6 is a perspective view of a heating coil and air distribution: _§ :: material intended for a vehicle seat according to a second embodiment of the invention; Figure 7 is a partially sectioned perspective view of the seat portion of a vehicle seat according to a second embodiment of the invention; OO OQO c 0 O 0 0 0 I 0 Q 0 O I ll OO 00 00 ln 000 10 15 20 25 30 6 Figure 8 is a partially sectioned perspective view of the seat part of a vehicle seat according to a third embodiment of the invention; Figure 9 is a sectional view of the seat part of a vehicle seat according to a variant of the above embodiments; Figures 10a-b are perspective views of the seat portion of a vehicle seat; Figure 11 is a perspective view of an alternative embodiment of the invention; and Figure 12 shows a manufacturing method for a device according to the invention.

PREFERRED EMBODIMENTS: Figures 1-3 show components used in the present invention, but which are previously known per se.

The invention preferably has its area of use in connection with a vehicle seat, which according to what is shown in Figure 1 consists of a seat 1 comprising a seat part 2 and a backrest part 3. The description that follows is focused on the seat part 2, but the configuration according to the following description can also be applied. on a backrest part 3 belonging to the seat 1.

Said seat part 2 is normally manufactured by so-called cold foaming, which is a previously known manufacturing method for the production of soft, elastic foam plastic. Cold foaming is common in the manufacture of upholstery materials for cushions, mattresses, etc., and is based on certain predetermined components being mixed and reacted together so that foaming takes place. The reaction takes place at a relatively low temperature, suitably in a specially designed design tool. In the cold foaming process, a G I 0 0 0 0 0 I 0 o 0 0 0 0 00 00 00 00 00 00 00 00; 0 00 0000 00 0000 00 0000 00 I Ü I I I O O I I I 0 0 10 15 20 25 30 506 854 ._-_: "fermentation" whereby the finished plastic material is formed in the mold. The pre-molded part is called comfort foam 2 ”.

Seat part 2 is equipped for ventilation and tempering for increased comfort. Both the driver's seat and other vehicle seats can then be set up for ventilation by blowing or extracting air, preferably extraction, which will be the variant described in the following. The extracted air is led via at least one recess or opening 4 which is made in the seat part. The extracted air is led from an area at the top of the seat part 2, i.e. around the area of the person sitting in the seat in question, and further in through the seat part 2 via the opening 4. At least above the opening 4, preferably designed to fit in the opening, an air-distributing material 5 is placed as shown in Figure 2, which material 5 has a porous fibrous structure and is made of relatively thin fibers which are relatively sparsely placed in an asymmetrical three-dimensional mesh structure so that a distribution of air supplied to the metered material takes place.

As shown in Figure 2, the air-distributing material 5 forms a layer comprising an upper side 5 'and a lower side 5 ", which are substantially parallel and separated by the thickness d of the material. This air-distributing material 5 is not significantly compressed when someone sits in the vehicle seat, so its function is then not significantly affected.It is appropriate to use a material called “spaceH material, but different types of material can be used within the scope of the invention.

Suitably a material is chosen where the brim has such a elasticity that the shape of the material is mainly maintained when it is subjected to load. The fibers should also not be brittle so that they come off when subjected to load, but be resiliently resilient, so that the deformation which the material undergoes when it is subjected to load returns when the load is removed. The air-distributing material 5 further allows air-desolation both along and across the main extent of the seat part 2, as well as air-desolation in the intermediate directions. the term is used In summary, when "air-distributing material" 00 0 0 000 0000 000 OIIIII II 0000 00 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 OO 00 00 OI IC 10 OI 00 0000 00 0000 00 0 0 0 0 0 0 0 0 0 0 0 0 10 15 20 25 30 f 11 OL, \ CC * if! For example, in this context, it is meant in this context that the material 5 in question has certain properties, mainly that it is substantially incompressible when a passenger has sat in the seat, and that the material 5 allows a control of air at least in a direction substantially along the plane in which the air-distributing material 5 is oriented.

Tempering of the seat part 2 can take place in the form of cooling of the supplied air and / or by heating the seat part by means of a special, electrically heatable heating element 6, see Figure 3. The heating element 6 comprises in a manner previously known a pattern of electrically conductive element which according to the embodiment shown consists of electrically conductive resistance wires 7 in the form of a heating loop. However, the invention is not limited to this embodiment only, but the electrically conductive elements can alternatively consist of other forms of electrically conductive elements, for example carbon wires. nor do the electrically conductive elements need to be laid in such a configuration as shown in Figure 3, i.e. in the form of a regular loop, but can alternatively be laid in some other pattern, e.g. in a rivet net or in the form of a number of substantially parallel wires.

Because the heating element 6 is connected to a current supply unit 8 which supplies current, the heating element 6 can be heated up to a suitable temperature.

The heating element 6 also includes a temperature sensor 23 of a type known per se which is connected to the current supply unit 8. With the aid of the temperature sensor 23, the temperature in connection with the heating element 6 can be detected. In this way, a control of the temperature of the heating element 6 can be allowed in dependence on the current temperature and set setpoints regarding the desired temperature for the current seat. This type of temperature-dependent heat regulation is known per se and is therefore not described in detail here.

According to the present invention, the resistance wires 7 of the protection element are made in connection with the air-distributing material 5, according to a first embodiment as shown in Figure 4. Here, the resistance wires 7 are attached to the underside of a 0 000 Û I cb vi OQIO nu nian II 0000 ul l 0 u 0 0 I 0 I 0 l 0 0 Oc II 10 15 20 25 30 (ft l \.) O \ CC (f: a carrier 9, i.e. the side of the carrier 9 facing the comfort foam 2 '. The carrier consists of a thin, relatively thick layer of foamed polyurethane, or similar softly resilient material.The opening 4 of the comfort foam 2 'is arranged for mounting a layer of air-distributing material 5, the main plane of extension of the layer largely coinciding with the main plane of extension of the comfort foam 2'. 9, to which the resistance wires 7 are attached, so that the resistance wires 7 come into contact with the air-distributing material 5 and the carrier material 9 will be turned substantially upwards, from comfort foamed 2 '. The main extension plane of the carrier material 9 will in this case largely coincide with the main extension plane of the comfort foam 2 '.

According to Figure 5 in particular, which shows the invention in disassembled condition, the carrier material 9 has a surface extent which slightly exceeds the surface extent of the air-distributing material 5 and the dimensions of the recess 4. This means that the air-distributing material 5 and the carrier material 9 with associated resistance wires 7 will form a unit which is inserted into and mounted in the opening 4. Because the carrier material 9 has an extent which exceeds the extent of the opening 4 they are thus formed an edge portion 9a (cf. also Figure 4) of the carrier material 9 extending over the gap formed between the outer edge of the air-distributing element 5 and the corresponding inside 4a of the opening 4 (cf. Figure 5) in the comfort foam 2 '. This edge portion 9a then has two functions. One function is that it forms an edge strip with the aid of which the carrier material 9 can be fi xcerated towards the top of the comfort foam 2 '. This in turn can be implemented by coating the underside of the edge portion 9a with a suitable means for attaching the edge portion 9a to the top side of the comfort foam 2 ', e.g. a suitable glue.

The second function of the edge portion 9a is that it overlaps the above-mentioned gap between the outer edge of the air-distributing element 5 and the corresponding inner edge 4a of the opening 4, so that said gap is sealed for passage of air, if not completely so at least to a very high degree. cc 9 000 0000 000 n 0 o I I 00 I! IQ IIII Il OIOO OI "00 00 o O 0 0 0 0 II 0 OIOIOIIO OI IQ IO 10 15 20 25 30 An advantage of the present invention is that the carrier element 9 with resistance wires 7 and air distributing elements 5 can be manufactured as a single integrated unit which is ready for delivery and subsequent mounting in a seat, which in turn is made possible by first mounting the heating element 6 with the resistance wires 7 (or other suitable electrical element) on the carrier material 9, preferably by gluing. Then the formed unit (consisting of resistance wires 7 and carrier material 9) with the air-distributing material 5. When joining, it is ensured that the above-mentioned edge portion 9a of the carrier material 9 is defined, thus forming an integrated arrangement which can be delivered as a single delivery unit and mounted in an opening 4 shown in Figure 4. the carrier material 9 is larger than the opening 4, finally the edge portion 9a fi can be xered towards the top of the comfort foam 2 '.

In order to clearly indicate the structure of the invention, it is indicated by dashed arrows in Figure 2 how the carrier material 9 is attached to the air-distributing material 5 (whereby the resistance wires 7 are arranged between the carrier material 9 and the air-distributing material 5) and how the carrier material 9 edge portion 9a is attached to the top of the comfort foam 2 '.

After attachment of the carrier material 9, the desired upholstery 10 is applied to the seat part, whereby the upholstery 10 is clamped on the seat part 2, more specifically in so-called ditches 11, 12 which are formed in the comfort foam 2 '. Preferably, the molding tool used in the cold foaming process is designed so that the grooves 11, 12 arise in the comfort foam 2 'during its casting. These ditches 11, 12 are relatively narrow depressions in the comfort foam 2 ', at the bottom of which so-called tines (not shown), i.e. thin shaped metal rods arranged at the underside of the upholstery 10, are used for holding with cooperating fastening means 13 (shown schematically). as a partially dashed line in Figure 4) in the respective ditches 11, 12. Thus, the upholstery 10 is lowered into the ditches 11, 12 and fastened there to fastening means 13 by means of the toes.

As a result, the upholstery 10 will be clamped against the seat part 2.

Referring to Figure 5, the opening 4 in the comfort foam 2 'has a certain depth h and a certain shape, for example circular or square. The opening 4 communicates with a fl genuine 14 which can blow in or suck out air via at least one duct 15 made in the comfort foam 2 ”. Suitably a number of channels 15 are used, which is also shown in Figure 5. The fan 14 is preferably of the radial type and is according to the embodiment of the type which sucks air from an area at the top of the comfort foam 2 ', through the channels 15 and out via the hole 14. The opening 4, like the grooves 11, 12, are preferably formed in the comfort foam 2 'in that the shaping tool used in the cold foaming process is designed so that said opening 4 and the grooves 11, 12 occur in the comfort foam 2' during its casting.

According to a second preferred embodiment as shown in Figure 6, the resistance wires 7 are fastened between carriers consisting of a first layer 16 and a second layer 17 of the previously mentioned air-distributing material. With reference to Figure 7, the layers 16, 17 are placed in the opening 4 so that their main extension plane largely coincides with the main extension plane of the comfort foam. In this case, the heating wires are attached to the first 16 or the second 17 layer of the air-distributing material, or to both 16, 17. air-distributing material as carrier, no other special carrier material is used. In this embodiment, only this is used. Otherwise, the seat part 2 is assembled in the same way as the first embodiment.

According to a third preferred embodiment as shown in Figure 8, the resistance wires are baked inside a layer 18 of the air-distributing material.

Preferably, the resistance wires 7 are integrated with the air-distributing air-distributing material. That material in the manufacture of the air-distributing material 18 and the resistance wires "embedded" therein 7 00 0 0 0 000 000 0000 000 0 0 0 0 0 0 0 00 000 00 0 00 00 0 00 0000 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 00 00 00 15 15 25 25 526 12 are placed in the opening 4 so that their main extension plane largely coincides with the main extension plane of the comfort foam 2 '. In this embodiment, therefore, only the air-distributing material 18 is otherwise used as a carrier, no other special carrier materials are used. In, the seat part 2 is assembled in the same way as the first embodiment. led in the comfort foam look in many ways. One can, as shown in Figure 9, place For the above-mentioned embodiments, the duct where the air can be a presence sensor 19 of known type in the comfort foam 2 ', which presence sensor 19 aims, for example, to detect whether an airbag placed in connection with the current vehicle seat should be connected or not. For example, if a rear-facing child seat (not shown) is placed in the vehicle seat, it is not desirable for such an airbag to be activated in the event of a collision. Such a presence sensor 19 can advantageously also be used to activate a reminder signal for the use of seat belts, if applicable.

When such a presence sensor 19 is placed between the spigot 14 and the opening 4, it is required that the air flow be passed past the presence sensor 19 in a suitable manner. A bypass channel 20 as shown in Figure 9 is a suitable type of bypass. This channel can be rectangular with a long narrow cross-section, but can also have other cross-sections.

The invention is thus applicable to an arrangement as above with an air fate channel 20 which is led past a presence sensor 19 through a circumferential stretch.

For all the above embodiments, for the attachment of the resistance trees 7 to the actual carrier material 9, 16, 17, they are fastened, for example, by gluing, where the glue is applied in such a way that it follows the path of the resistance trees 7 and thus does not unnecessarily impede air. oo oooo oo oooo oo oooo oo oooooooooo 0 I oooooo oo- ooo oooo ooooooooooooooo oo o oo oo oo oo ooo oo oo 10 15 20 25 30 5 2 5 g 5 4 °. = .. ' 4 is arranged so that it is more integrated with the ditches 11, 12, 21, 22, 23, 24, so that these are assigned a distance which to a greater extent runs towards the middle part of the comfort foam 2 '.

In this case, clothing can be attached in a more satisfactory manner. in these cases the opening 4 will have a more irregular shape, a shape which will also apply to the air-distributing material (not shown) and, where applicable, also the carrier material for the resistance wires (not shown). With reference to Figure 10c, fl your openings 25, 26 may also be present, whereby luft your air distributors and, where applicable, carrier material for materials (not shown) the resistance wires (not shown) which fit in the openings 25, 26 are used.

Furthermore, the above embodiments, as previously mentioned, can also be applied to a backrest part 3 belonging to the seat 1, which as shown in Figure 1 can also be arranged for ventilation by blowing or extracting air to or from at least one air-distributing opening 30. Figure 11 shows a further embodiment of the invention, in which it is shown that it can be formed with a layer of a carrier material 9 which in turn on its underside carries electrically conductive elements 7, suitably in the form of resistance wires, included in a heating element of the above-mentioned kind. .

The resistor wires 7 are in turn connected to a current supply unit 8.

According to the embodiment, the carrier material 9 further carries two different units of air-distributing material 5, which are dimensioned to fit in two corresponding openings 4 in the comfort foam 2 'of the seat in question.

Analogous to what has been stated above, the carrier material 9 is designed so that it overlaps the gaps formed between the respective unit with air-distributing material 5 and the respective opening 4. In this way an edge portion 9a of the carrier material 9 is used which is used to seal this gap and to attach the carrier material 9 (and thus the whole unit comprising air-distributing material 5 and resistance wires 7) to the comfort foam 2 '. Analogous to what 00 0 au 000 000 0000 000 0 0 0 I 0 Ill 0000 00 0000 00 0 0 0 0 0 0 OI 00 00 10 15 20 25 30 526 8 01 -l> - 14 as stated above, the comfort foam 2 'has a number of accommodated ducts 15 in each opening 4, for supplying air through the seat.

The invention is not limited to one or two units consisting of air-distributing material, but can in principle be implemented with any number of units of air-distributing material, all of which can then be mounted on the underside of the carrier material. Fig. 12 schematically shows a manufacturing process for assembling an integrated unit according to the invention. Figure 12a shows how an adhesive string 27 is laid out on the underside of a carrier material 9 (cf. eg 4 gur 4 and 5).

The placement of the glue string 27 corresponds to the placement of a resistor wire (not shown in Figure 12a).

The next step in the manufacturing process is that the resistance wire 7 is passed on the glue string 27 on the carrier material 9. Figure 12b shows the unit after the resistance wire 7 with its connections (for connection to an I power supply unit) has been applied to the glue string.

The next step is to apply glue to the underside of the carrier material 9 and the resistance wire 7, in preparation for mounting one or more units of air-distributing material. This adhesive layer is shown in Figure 12c as a number of areas 28a, 28b, 28c on the underside of the carrier material 9. For the sake of clarity, the resistance wire 7 is not shown in Figure 12c.

According to a particular embodiment of the invention, which appears from Figure 12d, certain selected areas on the underside of the carrier material 9 can be provided with a specially applied layer of material 29, which may for instance consist of an extra thick layer of glue or alternatively a thin layer of fabric. dyl. The location, dimensions and thickness of this additional layer of material 29 are then selected according to special wishes on the control of the air flow through the relevant seat.

The additional material layer 29 then de denies an Iuft styr fate control layer as OO 00 0000 0 0 0 OIIO 0 0 0 0 0 0 000 000 0000 000 IOOOIIII 0 0 00 00 000 00 0 0 00 10 15 20 25 (fl l \ JO \ 'O i The degree of air permeability can then be controlled by the choice of thickness of said material layer 29. Insofar as the further material layer 29 is made of glue, it can be used to limit, for example, the flow of air flowing through in the area of the seat corresponding to the location of the material layer 29. The air gap in the area in question is limited depending on how thick this material layer 29 is made.

Finally, Figure 12e shows how a unit of air-distributing material is glued to the underside of the carrier 9. For the sake of clarity, neither the resistance wire 7, the adhesive layers 28a, 28b, 28c or the additional material layer 29 in Figure 12e are shown.

The invention is not limited to what is stated above, but various embodiments are possible within the scope of the claims. For example, before the upholstery 10 is applied, some form of additional padding for comfort reasons may be applied on top of the device according to the invention.

Furthermore, for example, a thin protective material layer can be found between air-distributing material 5 and the above-mentioned resistance wire 7, i.e. the resistance wires 7 need not be in direct respective unit of contact with the air-distributing material 5 as shown in e.g. Figure 4.

The design is suitably applied in connection with vehicle seats, but other types of seats may also be relevant.

Claims (10)

10 15 20 25 30 in JO Qx 16 PATENTKRAV An arrangement for ventilating a vehicle seat (1), which arrangement comprises an air-distributing material (5) and an electrically heating element (6) comprising at least one electrically conductive component (7) placed in a pattern adjacent to at least one carrier (9) , wherein the vehicle seat (1) comprises a seat part (2) arranged for ventilation by blowing or extracting air via at least one duct (15) through the seat part (2) and further through said air-distributing material (5), said carrier (9 ), heating elements (6) and air-distributing material (5) are manufactured as an integrated device arranged for mounting in connection with said vehicle seat (1), said air-distributing material (5) being designed as at least one unit dimensioned for mounting in a correspondingly designed recess (4) in the vehicle seat (1), characterized in that said carrier (9) is designed as a layer whose outer dimensions exceed the dimensions of said recess (4), an edge portion (9a) of the carrier (9) being defined which overlaps a gap between the outer edge (Sa) of the air-distributing material (5) and the inside (4a) of the recess (4). Arrangement according to claim 1, characterized in that said edge portion (9a) defines a seal of said gap to at least substantially prevent the flow of said air. Arrangement according to claim 1 or 2, characterized in that said edge portion (9a) is formed with means for anchoring the carrier (9) against said seat (1). Arrangement according to one of the preceding claims, characterized in that the carrier (9) consists of foamed polyurethane. 10 15 20 25 17 Arrangement according to any one of the preceding claims, characterized in that the air-distributing material (5) constitutes a carrier for said electrically conductive component (7). Arrangement according to any one of the preceding claims, characterized in that said electrically conductive component (7) is placed between two layers of the air-distributing material (5). Arrangement according to any one of the preceding claims, characterized in that said electrically conductive component (7) is placed inside a layer of the air-distributing material (5). An arrangement according to any one of the preceding claims, characterized in that it comprises an air fate controlling material layer (29) arranged between said carrier (9) and said air distributing material (5). Arrangement according to claim 8, characterized in that said material layer (29) consists of an adhesive layer whose thickness is selected depending on the permitted air flow through said carrier material (9) at the position of said material layer (29). Arrangement according to one of the preceding claims, characterized in that it is further used with a backrest part (3) belonging to the vehicle seat (1) which is arranged for ventilation by blowing or extracting air through at least one opening (30) through the arrangement. the air-distributing material (5).