WO2005075245A1 - Vehicle seat - Google Patents

Vehicle seat Download PDF

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Publication number
WO2005075245A1
WO2005075245A1 PCT/EP2005/000518 EP2005000518W WO2005075245A1 WO 2005075245 A1 WO2005075245 A1 WO 2005075245A1 EP 2005000518 W EP2005000518 W EP 2005000518W WO 2005075245 A1 WO2005075245 A1 WO 2005075245A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
ventilation layer
cushion
backrest
vehicle seat
Prior art date
Application number
PCT/EP2005/000518
Other languages
German (de)
French (fr)
Inventor
Karl-Heinz Minuth
Karl Pfahler
Lothar Renner
Original Assignee
Daimlerchrysler Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daimlerchrysler Ag filed Critical Daimlerchrysler Ag
Priority to EP05715195A priority Critical patent/EP1711370A1/en
Priority to US10/588,269 priority patent/US20090066122A1/en
Priority to JP2006551750A priority patent/JP2007520288A/en
Publication of WO2005075245A1 publication Critical patent/WO2005075245A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/56—Heating or ventilating devices
    • B60N2/5607—Heating or ventilating devices characterised by convection
    • B60N2/5621—Heating or ventilating devices characterised by convection by air
    • B60N2/5635—Heating or ventilating devices characterised by convection by air coming from the passenger compartment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/56—Heating or ventilating devices
    • B60N2/5607—Heating or ventilating devices characterised by convection
    • B60N2/5621—Heating or ventilating devices characterised by convection by air
    • B60N2/565—Heating or ventilating devices characterised by convection by air sucked from the seat surface

Definitions

  • the invention relates to a vehicle seat according to the preamble of claim 1.
  • Such vehicle seats are equipped with so-called active seat ventilation, in which air is sucked in from the passenger compartment and blown through the upholstery of the seat cushion and backrest, in order to then partially exit through the air-permeable upholstery cover to the front of the seat.
  • active seat ventilation in which air is sucked in from the passenger compartment and blown through the upholstery of the seat cushion and backrest, in order to then partially exit through the air-permeable upholstery cover to the front of the seat.
  • this air removes moisture and heat from the upholstery and on the other hand cools the heated surfaces of the upholstery.
  • the backrest has a backrest cushion and a backrest covering that conceals the back of the backrest, a cavity remaining between the backrest cushion and backrest covering.
  • the backrest upholstery consists of a pressure distribution layer attached to an upholstery support with an inflow opening for ventilation air at the lower end and an air-permeable ventilation layer made of rubber hair, which is covered with an air-permeable upholstery cover.
  • a fan is arranged at the inflow opening, which sucks in air from the cavity and blows it into the ventilation layer.
  • the ventilation air flows through the ventilation layer and exits again through an air outlet opening arranged at the upper end.
  • the backrest In rear seats, the backrest is arranged directly on the rear wall of the passenger compartment, which separates the passenger compartment from the trunk.
  • a large number of units and electrical control units are installed in the trunk in the area of the rear or partition wall, which emit a relatively large amount of heat and thus heat up the space still existing between the backrest and the rear wall of the passenger compartment. Only relatively warm intake air is then available for active seat ventilation, which sucks in air from the space and blows it into the ventilation layer of the backrest cushion, so that adequate seat cooling cannot be achieved.
  • the seat user of the rear seat lacks the feeling of freshness that makes the seat comfortable.
  • the invention has for its object to change the active seat ventilation in a vehicle seat of the type mentioned so that even when using the vehicle seat as a rear seat with installation on the rear wall of the passenger compartment, sufficient fresh air flows through the ventilation layer of the backrest cushion and thus also with a rear seat the desired seating comfort is achieved in front of the rear wall of the passenger compartment.
  • the vehicle seat according to the invention has the advantage that the at least one second fan assigned to the upper ventilation layer section transports fresh air through the upholstery cover and the air duct or ventilation layer into the heated backrest space due to its air flow direction reversed with respect to the at least one first fan, so that the at least one first fan associated with the lower ventilation layer section is in turn able to blow significantly cooler air into the ventilation layer.
  • the backrest cushion is better ventilated overall and with much cooler air, which leads to an improvement in seating comfort.
  • the increase in seating comfort is achieved with low additional costs only due to the additional second fan and does not require any design changes to the vehicle seat, so that the seating concept for the front seats can also be retained for the rear seats.
  • the drawing shows a schematic representation of a partial side view of one in a passenger compartment a vehicle as a rear seat installed vehicle seat with the backrest shown in longitudinal section.
  • a rear seat with a seat cushion 11 and a backrest 12 and is arranged in the rear of a passenger compartment 13 of the vehicle.
  • the passenger compartment 13 is separated by a rear wall 14 from a trunk 15, which merges into the parcel shelf or trunk cover 16 at the upper edge of the backrest 12.
  • the rear wall 14 ends at a seat platform 17, which is formed in one piece with the floor pan of the vehicle and serves to accommodate the rear seat.
  • the seat cushion 11 is fastened in such a way that the backrest 12 rests with its upper, somewhat rearward-shaped end against the rear wall 14 and between the rear wall 14 and the backrest 12 there is an intermediate space, in the following backrest space
  • Called 18 remains.
  • the head cushion 19 placed above the trunk cover 16 is indicated by a headrest assigned to the rear seat.
  • the backrest 12 shown in longitudinal section has a backrest cushion 20 on which backrest cheeks 21 are integrally formed for the purpose of supporting the seated person.
  • the backrest cushion 20 consists of a cushion cover 22 which is fixed to a cushion support 23, an air guidance or ventilation layer 24 covering the cushion cover 22, a pressure distribution layer 25 covering the ventilation layer 24 and an air-permeable cushion cover 26 spanning the pressure distribution layer 25, which the seat user facing front of the backrest cushion 20 completes.
  • the cushion cover 22 consists of a rubber hair layer with an integrated air barrier layer
  • the ventilation layer 24 consists of a pressure-resistant spacer fabric
  • the pressure distribution layer 25 made of a perforated or perforated foam
  • the cushion cover 26 made of fabric or leather.
  • An air duct 27 is formed in the pressure distribution layer 25 in its lower region and an air duct 28 is spaced apart from it in its upper region.
  • Each air duct 27, 28 penetrates the cushion cover 22 all the way to the ventilation layer 24 and opens into the back space 18.
  • At least one first fan 29 is arranged in the lower air duct 27 and at least one second fan 30 is arranged in the upper air duct 28.
  • the fans 29, 30 can also be attached in a larger version on the back of the backrest cushion 20.
  • the fans 29, 30 are in the air channels 27,
  • the lower, first fan 29 draws air from the backrest area 18 and the upper, second fan 30 blows air into the backrest area 18.
  • an air barrier 31 running horizontally in the transverse direction of the seat, which extends over the entire width of the backrest cushion 20 and separates the ventilation layer 24 into a lower section 241 and an upper section 242 such that no air exchange between these two sections 241 and 242 is possible.
  • the lower air duct 27 thus opens at the lower section 241 of the ventilation layer 24 and the upper air duct 28 at the upper section 242 of the ventilation layer 24.
  • the upper, second fan 30 sucks in air from the upper region of the front of the backrest cushion 20 via the air-permeable cushion cover 26, the perforated pressure distribution layer 25 and the upper section 242 of the ventilation layer 24, and blows it out into the backrest space 18.
  • the air delivery through the upper, second fan 30 is controlled by appropriate air flow arrows indicated in the drawing.
  • the fresh air flowing in the upper section 242 of the ventilation layer 24 absorbs moisture and heat in the upper region of the backrest cushion 20 and removes it. This air displaces the significantly warmer air in the heated backrest area 18.
  • the lower first fan 29 draws in the air blown out by the upper second fan 30, which is significantly cooler than the air previously present in the heated backrest area 18, and blows it into the lower section 241 ventilation layer 24.
  • part of the air flow also exits via the lower region of the perforated pressure distribution layer 25 and the air-permeable cushion cover 26 spanning this region, so that the surface of the backrest cushion 20 is cooled.
  • a plurality of air channels, each associated with the lower section 241 and the upper section 242 of the ventilation layer 24, are provided with integrated fans, which are preferably formed in the cushion cover 22 evenly distributed over the lower and upper sections 241, 242 of the ventilation layer 24.
  • All the fans assigned to the lower section 241 have the same air delivery direction and blow ventilation air from the backrest space 18 into the lower section 241 of the ventilation layer 24.
  • All the fans facing the upper section 242 also have the same air delivery direction, but suck ventilation air from the front of the backrest cushion 20 through the upper section 242 of the ventilation layer 24.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Seats For Vehicles (AREA)

Abstract

The invention relates to a vehicle seat, in particular a rear seat, comprising a back rest (12) provided with upholstery (20) having a ventilation layer through which air can flow (24), and at least one ventilator (29) for ventilating the upholstery, which suctions the air from the rear area of the upholstery (20) and blows into the ventilation layer (24). In order to maintain the air conditioning comfort of the seat even when the vehicle seat is used as a rear sear which is inserted directly in front of the rear wall of the passenger compartment, the ventilation layer is divided into an upper and lower section by means of an air barrier extending in a cross-direction in relation to the seat. At least one ventilator is associated with the lower section of the ventilation layer and at least one other ventilator comprising an air conveying device acting inversely in relation to the air conditioning device of the first ventilator is associated with the upper section of the ventilation layer

Description

Fahrzeugsitz vehicle seat
Die Erfindung betrifft einen Fahrzeugsitz gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a vehicle seat according to the preamble of claim 1.
Zur Erzielung eines hohen Sitzklimakomforts sind solche Fahrzeugsitze mit einer sog. aktiven Sitzbelüftung ausgestattet, bei welcher Luft aus dem Fahrgastraum angesaugt und durch die Polster von Sitzkissen und Rückenlehne hindurchgeblasen wird, um dann teilweise über den luftdurchlässigen Polsterbezug zur der Vorderseite des Sitzes hin auszutreten. Diese Luft führt einerseits Feuchte und Wärme aus dem Polster ab und kühlt andererseits die erwärmten Oberflächen des Polsters .To achieve a high level of seat climate comfort, such vehicle seats are equipped with so-called active seat ventilation, in which air is sucked in from the passenger compartment and blown through the upholstery of the seat cushion and backrest, in order to then partially exit through the air-permeable upholstery cover to the front of the seat. On the one hand, this air removes moisture and heat from the upholstery and on the other hand cools the heated surfaces of the upholstery.
Bei einem bekannten Fahrzeugsitz mit aktiver Sitzbelüftung (DE 198 04 284 C2) weist die Rückenlehne ein Lehnenpolster und eine die Rückseite der Rückenlehne kaschierende Lehnenverkleidung auf, wobei zwischen Lehnenpolster und Lehnenverkleidung ein Hohlraum verbleibt. Das Lehnenpolster besteht aus einer an einem Polsterträger festgelegten Druckverteilungsschicht mit einer am unteren Ende angeordneten Einströmöffnung für Ventilationsluft und einer darauf aufliegenden, luftdurchlässigen Ventilationsschicht aus Gummihaar, die mit einem luftdurchlässigen Polsterbezug überzogen ist. An der Einströmöffnung ist ein Ventilator angeordnet, der Luft aus dem Hohlraum ansaugt und in die Ventilationsschicht einbläst. Die Ventilationsluft durchströmt die Ventilationsschicht und tritt über eine am oberen Ende angeordnete Luft- ausströmöffnung wieder aus. Teilweise strömt die Ventilati- onsluft auch aus den Poren des Polsterbezugs aus, insbesondere bei unbesetztem Fahrzeugsitz. Die Wirksamkeit einer solchen aktiven Sitzbelüftung bezüglich eines gesteigerten Sitzklimakomforts setzt voraus, dass im Hohlraum der Rückenlehne ausreichend Frischluft zur Verfügung steht, die aus dem Fahrgastraum, insbesondere vom Boden in den Hohlraum nachströmt .In a known vehicle seat with active seat ventilation (DE 198 04 284 C2), the backrest has a backrest cushion and a backrest covering that conceals the back of the backrest, a cavity remaining between the backrest cushion and backrest covering. The backrest upholstery consists of a pressure distribution layer attached to an upholstery support with an inflow opening for ventilation air at the lower end and an air-permeable ventilation layer made of rubber hair, which is covered with an air-permeable upholstery cover. A fan is arranged at the inflow opening, which sucks in air from the cavity and blows it into the ventilation layer. The ventilation air flows through the ventilation layer and exits again through an air outlet opening arranged at the upper end. Some of the ventilation flows onsluft also from the pores of the upholstery, especially when the vehicle seat is unoccupied. The effectiveness of such active seat ventilation with regard to increased seat climate comfort presupposes that sufficient fresh air is available in the cavity of the backrest, which flows in from the passenger compartment, in particular from the floor, into the cavity.
Bei Fondsitzen ist die Rückenlehne unmittelbar an der Rückwand des Fahrgastraums angeordnet, die den Fahrgastraum vom Kofferraum trennt. In einigen Kraftfahrzeugen sind im Kofferraum im Bereich der Rück- oder Trennwand eine Vielzahl von Aggregaten und elektrische Steuergeräte installiert, die relativ viel Wärme abgeben und somit den noch zwischen der Rückenlehne und der Rückwand des Fahrgastraums vorhandenen Zwischenraum aufheizen. Für die aktive Sitzbelüftung, die Luft aus dem Zwischenraum ansaugt und in die Ventilationsschicht des Lehnenpolsters einbläst, steht dann nur noch relativ warme Ansaugluft zur Verfügung, so dass eine ausreichende Sitzkühlung nicht erreicht werden kann. Dem Sitzbenutzer des Fondsitzes fehlt das den Sitzklimakomfort ausmachende Frischegefühl beim Sitzen.In rear seats, the backrest is arranged directly on the rear wall of the passenger compartment, which separates the passenger compartment from the trunk. In some motor vehicles, a large number of units and electrical control units are installed in the trunk in the area of the rear or partition wall, which emit a relatively large amount of heat and thus heat up the space still existing between the backrest and the rear wall of the passenger compartment. Only relatively warm intake air is then available for active seat ventilation, which sucks in air from the space and blows it into the ventilation layer of the backrest cushion, so that adequate seat cooling cannot be achieved. The seat user of the rear seat lacks the feeling of freshness that makes the seat comfortable.
Der Erfindung liegt die Aufgabe zugrunde, bei einem Fahrzeugsitz der eingangs genannten Art die aktive Sitzbelüftung so zu verändern, dass auch bei Verwendung des Fahrzeugsitzes als Fondsitz mit Einbau an der Rückwand des Fahrgastraums ausreichend frische Luft die Ventilationsschicht des Lehnenpolsters durchströmt und so auch bei einem Fondsitz vor warmer Fahr-gastraum-Rückwand der gewünschte Sitzklimakomfort erreicht wird.The invention has for its object to change the active seat ventilation in a vehicle seat of the type mentioned so that even when using the vehicle seat as a rear seat with installation on the rear wall of the passenger compartment, sufficient fresh air flows through the ventilation layer of the backrest cushion and thus also with a rear seat the desired seating comfort is achieved in front of the rear wall of the passenger compartment.
Die Aufgabe ist erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst . Der erfindungsgemäße Fahrzeugsitz hat den Vorteil, dass der mindestens eine, dem oberen Ventilationsschichtabschnitt zugeordnete zweite Ventilator aufgrund seiner gegenüber dem mindestens einen ersten Ventilator umgekehrten Luftförderrichtung Frischluft durch den Polsterbezug und die Luftfüh- rungs- oder Ventilationsschicht hindurch in den aufgeheizten Lehnenrückraum transportiert, so dass der dem unteren Ventilationsschichtabschnitt zugeordnete mindestens eine erste Ventilator seinerseits deutlich kühlere Luft in die Ventilationsschicht einzublasen vermag. Dadurch wird das Lehnenpolster insgesamt besser und mit wesentlich kühlerer Luft durchlüftet, was zu einer Verbesserung des Sitzkomforts führt. Der Sitzkomfortgewinn wird mit nur durch den zusätzlichen zweiten Ventilator bedingten, geringen Mehrkosten erzielt und erfordert keine konstruktive Umgestaltung des Fahrzeugsitzes, so dass das Sitzkonzept für die Vordersitze auch für die Fondsitze unverändert beibehalten werden kann. Da häufig in der Rückenlehne schon mehrere Ventilatoren zur Sitzbelüftung vorhanden sind, die gleichmäßig über das Lehnenpolster verteilt sind, entfallen selbst diese geringen Mehrkosten, da die Förderrichtung der dem oberen Ventilationsschichtabschnitt zugeordneten Ventilatoren lediglich umgekehrt werden muss, diese Ventilatoren also nur um 180° gewendet eingebaut werden müssen.The object is achieved by the features of claim 1. The vehicle seat according to the invention has the advantage that the at least one second fan assigned to the upper ventilation layer section transports fresh air through the upholstery cover and the air duct or ventilation layer into the heated backrest space due to its air flow direction reversed with respect to the at least one first fan, so that the at least one first fan associated with the lower ventilation layer section is in turn able to blow significantly cooler air into the ventilation layer. As a result, the backrest cushion is better ventilated overall and with much cooler air, which leads to an improvement in seating comfort. The increase in seating comfort is achieved with low additional costs only due to the additional second fan and does not require any design changes to the vehicle seat, so that the seating concept for the front seats can also be retained for the rear seats. Since there are often several fans for seat ventilation in the backrest, which are evenly distributed over the backrest upholstery, even these small additional costs do not apply, since the conveying direction of the fans assigned to the upper ventilation layer section only has to be reversed, so these fans are only installed turned through 180 ° Need to become.
Vorteilhafte Ausführungsformen des erfindungsgemäßen Fahrzeugsitzes mit zweckmäßigen Weiterbildungen und Ausgestaltungen der Erfindung sind in den weiteren Patentansprüchen angegebe .Advantageous embodiments of the vehicle seat according to the invention with expedient developments and refinements of the invention are specified in the further patent claims.
Die Erfindung ist anhand eines in der Zeichnung dargestellten Ausführungsbeispiels im folgenden näher beschrieben. Dabei zeigt die Zeichnung in schematischer Darstellung ausschnittweise eine Seitenansicht eines in einem Fahrgastraum eines Fahrzeugs als Fondsitz eingebauten Fahrzeugsitzes mit im Längsschnitt dargestellter Rückenlehne.The invention is described below with reference to an embodiment shown in the drawing. The drawing shows a schematic representation of a partial side view of one in a passenger compartment a vehicle as a rear seat installed vehicle seat with the backrest shown in longitudinal section.
Der in Fig. 1 ausschnittweise in Seitenansicht, teilweise geschnitten und schematisch dargestellte Fahrzeugsitz ist als Fondsitz mit Sitzkissen 11 und Rückenlehne 12 konzipiert und im Fond eines Fahrgastraums 13 des Fahrzeugs angeordnet . Der Fahrgastraum 13 ist durch eine Rückwand 14 von einem Kofferraum 15 getrennt, die an der Oberkante der Rückenlehne 12 in die Hutablage oder Kofferraumabdeckung 16 übergeht. Unten endet die Rückwand 14 an einem Sitzpodest 17, das einstückig mit der Bodenwanne des Fahrzeugs ausgebildet ist und zur Aufnahme des Fondsitzes dient. Auf dem Sitzpodest1, partially in section and schematically shown, is designed as a rear seat with a seat cushion 11 and a backrest 12 and is arranged in the rear of a passenger compartment 13 of the vehicle. The passenger compartment 13 is separated by a rear wall 14 from a trunk 15, which merges into the parcel shelf or trunk cover 16 at the upper edge of the backrest 12. At the bottom, the rear wall 14 ends at a seat platform 17, which is formed in one piece with the floor pan of the vehicle and serves to accommodate the rear seat. On the seat platform
17 ist das Sitzkissen 11 so befestigt, dass die Rückenlehne 12 mit ihrem oberen, etwas nach hinten ausgeformten Ende an der Rückwand 14 anliegt und zwischen der Rückwand 14 und der Rückenlehne 12 ein Zwischenraum, im folgenden Lehnenrückraum17, the seat cushion 11 is fastened in such a way that the backrest 12 rests with its upper, somewhat rearward-shaped end against the rear wall 14 and between the rear wall 14 and the backrest 12 there is an intermediate space, in the following backrest space
18 genannt, verbleibt. Von einer dem Fondsitz zugeordneten Kopfstütze ist das oberhalb der Kofferraumabdeckung 16 platzierte Kopfpolster 19 angedeutet.Called 18 remains. The head cushion 19 placed above the trunk cover 16 is indicated by a headrest assigned to the rear seat.
Die im Längsschnitt dargestellte Rückenlehne 12 weist ein Lehnenpolster 20 auf, an dem seitlich Lehnenwangen 21 zur Körperabs ützung des Sitzenden angeformt sind. Das Lehnenpolster 20 besteht aus einer Polsterauflage 22, die an einem Polsterträger 23 festgelegt ist, einer die Polsterauflage 22 überziehenden Luftführungs- oder Ventilationsschicht 24, einer die Ventilationsschicht 24 abdeckenden Druckverteilungsschicht 25 und einem die Druckverteilungsschicht 25 überspannenden, luftdurchlässigen Polsterbezug 26, der die einem Sitzbenutzer zugekehrte Vorderseite des Lehnenpolsters 20 abschließt. Im beschriebenen Ausführungsbeispiel besteht die Polsterauflage 22 aus einer Gummihaarschicht mit integrierter Luftsperrschicht, die Ventilationsschicht 24 aus einem druckfesten Abstandsgewirk, die Druckverteilungsschicht 25 aus einem gelochten oder perforierten Schaumstoff und der Polsterbezug 26 aus Stoff oder Leder. In der Druckverteilungsschicht 25 ist in deren unterem Bereich ein Luftkanal 27 und mit Abstand davon in deren oberem Bereich ein Luftkanal 28 ausgebildet. Jeder Luftkanal 27, 28 durchdringt die Polsterauflage 22 vollständig bis hin zur Ventilationsschicht 24 und mündet im Lehnenrückraum 18. Im unteren Luftkanal 27 ist mindestens ein erster Ventilator 29 und im oberen Luftkanal 28 mindestens ein zweiter Ventilator 30 angeordnet. Die Ventilatoren 29, 30 können aber auch in größerer Ausführung auf der Rückseite des Lehnenpolsters 20 befestigt sein. Die Ventilatoren 29, 30 sind so in die Luftkanäle 27,The backrest 12 shown in longitudinal section has a backrest cushion 20 on which backrest cheeks 21 are integrally formed for the purpose of supporting the seated person. The backrest cushion 20 consists of a cushion cover 22 which is fixed to a cushion support 23, an air guidance or ventilation layer 24 covering the cushion cover 22, a pressure distribution layer 25 covering the ventilation layer 24 and an air-permeable cushion cover 26 spanning the pressure distribution layer 25, which the seat user facing front of the backrest cushion 20 completes. In the exemplary embodiment described, the cushion cover 22 consists of a rubber hair layer with an integrated air barrier layer, the ventilation layer 24 consists of a pressure-resistant spacer fabric, and the pressure distribution layer 25 made of a perforated or perforated foam and the cushion cover 26 made of fabric or leather. An air duct 27 is formed in the pressure distribution layer 25 in its lower region and an air duct 28 is spaced apart from it in its upper region. Each air duct 27, 28 penetrates the cushion cover 22 all the way to the ventilation layer 24 and opens into the back space 18. At least one first fan 29 is arranged in the lower air duct 27 and at least one second fan 30 is arranged in the upper air duct 28. The fans 29, 30 can also be attached in a larger version on the back of the backrest cushion 20. The fans 29, 30 are in the air channels 27,
28 eingesetzt, dass ihre Luftförderrichtungen einander entgegengesetzt sind, so dass der untere, erste Ventilator 29 Luft aus dem Lehnenrückraum 18 ansaugt und der obere, zweite Ventilator 30 Luft in den Lehnenrückraum 18 einbläst. In der Ventilationsschicht 24 ist eine horizontal in Sitzquerrichtung verlaufende Luftbarriere 31 angeordnet, die sich über die gesamte Breite des Lehnenpolsters 20 erstreckt und die Ventilationsschicht 24 in einen unteren Abschnitt 241 und einen oberen Abschnitt 242 so trennt, dass kein Luftaustausch zwischen diesen beiden Abschnitten 241 und 242 möglich ist. Somit mündet der untere Luftkanal 27 an dem unteren Abschnitt 241 der Ventilationsschicht 24 und der obere Luftkanal 28 an dem oberen Abschnitt 242 der Ventilationsschicht 24.28 used that their air delivery directions are opposite to each other, so that the lower, first fan 29 draws air from the backrest area 18 and the upper, second fan 30 blows air into the backrest area 18. Arranged in the ventilation layer 24 is an air barrier 31 running horizontally in the transverse direction of the seat, which extends over the entire width of the backrest cushion 20 and separates the ventilation layer 24 into a lower section 241 and an upper section 242 such that no air exchange between these two sections 241 and 242 is possible. The lower air duct 27 thus opens at the lower section 241 of the ventilation layer 24 and the upper air duct 28 at the upper section 242 of the ventilation layer 24.
Ist die Sitzbelüftung aktiviert, also die Ventilatoren 29,If the seat ventilation is activated, i.e. the fans 29,
30 eingeschaltet, so saugt der obere, zweite Ventilator 30 über den luftdurchlässigen Polsterbezug 26, die perforierte Druckverteilungsschicht 25 und den oberen Abschnitt 242 der Ventilationsschicht 24 Luft aus dem oberen Bereich der Vorderseite des Lehnenpolsters 20 an, und bläst diese in den Lehnenrückraum 18 aus. Die Luftförderung durch den oberen, zweiten Ventilator 30 ist durch entsprechende Luftströmungs- pfeile in der Zeichnung angedeutet . Die in dem oberen Abschnitt 242 der Ventilationsschicht 24 strömende, frische Luft nimmt Feuchte und Wärme im oberen Bereich des Lehnenpolster 20 auf und führt diese ab. Diese Luft verdrängt die deutlich wärmere Luft im aufgeheizten Lehnenrückraum 18. Der untere erste Ventilator 29 saugt die vom oberen zweiten Ventilator 30 ausgeblasene Luft, die deutlich kühler ist als die zuvor im aufgeheizten Lehnenrückraum 18 vorhandene Luft, an und bläst diese in den unteren Abschnitt 241 der Ventilationsschicht 24 ein. Die Luft durchströmt in gleicher Weise den unteren Abschnitt 241 der Ventilationsschicht 24 und tritt am unteren Ende der VentilationsSchicht 24 aus, wobei die Ventilationsluft wiederum Feuchte und Wärme aus dem unteren Bereich des Lehnepolsters 20 abführt. Bei unbesetztem Fondsitz tritt ein Teil der Luftströmung auch über den unteren Bereich der perforierten Druckverteilungsschicht 25 und den diesen Bereich überspannenden, luftdurchlässigen Polsterbezug 26 aus, so dass die Oberfläche des Lehnenpolsters 20 gekühlt wird.30 switched on, the upper, second fan 30 sucks in air from the upper region of the front of the backrest cushion 20 via the air-permeable cushion cover 26, the perforated pressure distribution layer 25 and the upper section 242 of the ventilation layer 24, and blows it out into the backrest space 18. The air delivery through the upper, second fan 30 is controlled by appropriate air flow arrows indicated in the drawing. The fresh air flowing in the upper section 242 of the ventilation layer 24 absorbs moisture and heat in the upper region of the backrest cushion 20 and removes it. This air displaces the significantly warmer air in the heated backrest area 18. The lower first fan 29 draws in the air blown out by the upper second fan 30, which is significantly cooler than the air previously present in the heated backrest area 18, and blows it into the lower section 241 ventilation layer 24. The air flows through the lower section 241 of the ventilation layer 24 in the same way and exits at the lower end of the ventilation layer 24, the ventilation air in turn removing moisture and heat from the lower region of the backrest cushion 20. When the rear seat is unoccupied, part of the air flow also exits via the lower region of the perforated pressure distribution layer 25 and the air-permeable cushion cover 26 spanning this region, so that the surface of the backrest cushion 20 is cooled.
In dem beschriebenen Ausführungsbeispiel sind in der Polsterauflage 22 lediglich zwei mit Ventilatoren 29, 30 besetzte Luftkanäle 27, 28 dargestellt, wobei der untere Luftkanal 27 an dem unteren Abschnitt 241 der Ventilationsschicht 24 und der obere Luftkanal 28 an dem oberen Abschnitt 242 der Ventilationsschicht 24 mündet. Vorteilhaft werden eine Mehrzahl von jeweils dem unteren Abschnitt 241 und dem oberen Abschnitt 242 der Ventilationsschicht 24 zugeordnete Luftkanäle mit integrierten Ventilatoren vorgesehen, die vorzugsweise gleichmäßig über den unteren bzw. oberen Abschnitt 241, 242 der Ventilationsschicht 24 verteilt in der Polsterauflage 22 ausgebildet sind. Alle dem unteren Abschnitt 241 zugeordneten Ventilatoren haben die gleiche Luftförderrichtung und blasen Ventilationsluft von dem Lehnenrückraum 18 in den unteren Abschnitt 241 der Ventilationsschicht 24 ein. Alle dem oberen Abschnitt 242 zugekehrten Ventilatoren haben ebenfalls die gleiche Luftförderrichtung, saugen jedoch Ventilationsluft von der Vorderseite des Lehnenpolsters 20 durch den oberen Abschnitt 242 der Ventilationsschicht 24 hindurch. In the exemplary embodiment described, only two air ducts 27, 28 occupied by fans 29, 30 are shown in the cushion cover 22, the lower air duct 27 opening at the lower section 241 of the ventilation layer 24 and the upper air duct 28 opening at the upper section 242 of the ventilation layer 24 , Advantageously, a plurality of air channels, each associated with the lower section 241 and the upper section 242 of the ventilation layer 24, are provided with integrated fans, which are preferably formed in the cushion cover 22 evenly distributed over the lower and upper sections 241, 242 of the ventilation layer 24. All the fans assigned to the lower section 241 have the same air delivery direction and blow ventilation air from the backrest space 18 into the lower section 241 of the ventilation layer 24. All the fans facing the upper section 242 also have the same air delivery direction, but suck ventilation air from the front of the backrest cushion 20 through the upper section 242 of the ventilation layer 24.

Claims

Patentansprüche claims
Fahrzeugsitz, insbesondere Fondsitz, mit einer Rückenlehne (12), die • ein Lehnenpolster (20) mit einer luft- durchflutbaren Ventilationsschicht (24) aufweist, und mit mindestens einem Ventilator (29) zur Polsterbelüftung, der Luft von der Rückseite des Lehnenpolsters (20) ansaugt und in die Ventilationsschicht (24) einbläst, dadurch gekennzeichnet, dass die Ventilationsschicht (24) mittels einer in Sitzquerrichtung verlaufenden Luftbarriere (31) in einen unteren Abschnitt (241) und einen oberen Abschnitt (242) unterteilt ist und mindestens ein erster Ventilator (29) dem unteren Abschnitt (241) und mindestens ein zweiter Ventilator (30) dem oberen Abschnitt (242) zugeordnet ist, wobei der zweite Ventilator (30) in zur Luftförderrichtung des ersten Ventilators (29) entgegengesetzter Luf förderrichtung arbeitet .Vehicle seat, in particular rear seat, with a backrest (12) which • has a backrest cushion (20) with an air-permeable ventilation layer (24) and with at least one fan (29) for cushioning ventilation, the air from the back of the backrest cushion (20 ) sucks and blows into the ventilation layer (24), characterized in that the ventilation layer (24) is divided into a lower section (241) and an upper section (242) and at least one first fan by means of an air barrier (31) extending in the transverse direction of the seat (29) the lower section (241) and at least one second fan (30) is assigned to the upper section (242), the second fan (30) working in the opposite direction to the air delivery direction of the first fan (29) air delivery direction.
Fahrzeugsitz nach Anspruch 1, dadurch gekennzeichnet, dass das Lehnenpolster (20) eine Polsterauflage (22) aufweist, in der im Bereich des oberen Abschnitts (242) der Ventilationsschicht (24) mindestens ein oberer Luft- kanal (28) und im Bereich des unteren Abschnitts (241) der Ventilationsschicht (24) mindestens ein unterer Luftkanal (27) vorgesehen ist, dass jeder Luftkanal (27, 28) die Polsterauflage (22) von der Rückseite des Lehnenpolsters (20) bis zur Ventilationsschicht (24) voll- ständig durchdringt und dass jeweils ein Ventilator (29, 30) einem Luftkanal (27, 28) zugeordnet ist.Vehicle seat according to claim 1, characterized in that the backrest cushion (20) has a cushion cover (22) in which at least one upper air duct (28) in the region of the upper section (242) of the ventilation layer (24) and in the region of the lower one Section (241) of the ventilation layer (24) at least one lower air duct (27) is provided so that each air duct (27, 28) completely covers the cushion cover (22) from the back of the backrest cushion (20) to the ventilation layer (24). constantly penetrates and that in each case one fan (29, 30) is assigned to an air duct (27, 28).
3. Fahrzeugsitz nach Anspruch 2, dadurch gekennzeichnet, dass die Ventilatoren (29, 30) in den Luftkanälen (27, 28) selbst angeordnet sind.;3. Vehicle seat according to claim 2, characterized in that the fans (29, 30) in the air channels (27, 28) themselves are arranged .;
4. Fahrzeugsitz nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die Polsterauflage (22) auf einem Polsterträger (23) festgelegt ist.4. Vehicle seat according to claim 2 or 3, characterized in that the cushion pad (22) is fixed on a cushion carrier (23).
5. Fahrzeugsitz nach einem der Ansprüche 2 - 4, dadurch gekennzeichnet, dass die Polsterauflage (22) aus einer Gummihaarschicht mit einer Luftsperrschicht besteht.5. Vehicle seat according to one of claims 2-4, characterized in that the cushion pad (22) consists of a rubber hair layer with an air barrier layer.
6. Fahrzeugsitz nach einem der Ansprüche 1 - 5, dadurch gekennzeichnet, dass das Lehnenpolster (20) eine die Ventilationsschicht (24) abdeckende Druckverteilungsschicht (25) und einen die Druckverteilungsschicht überspannenden, luftdurchlässigen Polsterbezug (26) aufweist.6. Vehicle seat according to one of claims 1-5, characterized in that the backrest cushion (20) has a ventilation layer (24) covering pressure distribution layer (25) and an air-permeable cushion cover (26) spanning the pressure distribution layer.
7. Fahrzeugsitz nach Anspruch 6, dadurch gekennzeichnet, dass die Druckverteilungsschicht (25) aus einem gelochten Schaumstoff besteht .7. Vehicle seat according to claim 6, characterized in that the pressure distribution layer (25) consists of a perforated foam.
8. Fahrzeugsitz nach einem der Ansprüche 1 - 7, dadurch gekennzeichnet, dass die Ventilationsschicht (24) aus einem druckfestem Abstandsgewirk besteht . 8. Vehicle seat according to one of claims 1-7, characterized in that the ventilation layer (24) consists of a pressure-resistant spacer fabric.
PCT/EP2005/000518 2004-02-05 2005-01-20 Vehicle seat WO2005075245A1 (en)

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US10/588,269 US20090066122A1 (en) 2004-02-05 2005-01-20 Vehicle seat
JP2006551750A JP2007520288A (en) 2004-02-05 2005-01-20 Vehicle seat

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US20090066122A1 (en) 2009-03-12
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DE102004005573A1 (en) 2005-09-01

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