US20060175877A1 - Heat, cool, and ventilate system for automotive applications - Google Patents
Heat, cool, and ventilate system for automotive applications Download PDFInfo
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- US20060175877A1 US20060175877A1 US11/348,701 US34870106A US2006175877A1 US 20060175877 A1 US20060175877 A1 US 20060175877A1 US 34870106 A US34870106 A US 34870106A US 2006175877 A1 US2006175877 A1 US 2006175877A1
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- Prior art keywords
- ventilation
- air
- temperature
- temperature regulation
- seat
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Classifications
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- 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
- B60N2/90—Details or parts not otherwise provided for
- B60N2/986—Side-rests
- B60N2/99—Side-rests adjustable
-
- 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
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/62—Accessories for chairs
- A47C7/72—Adaptations for incorporating lamps, radio sets, bars, telephones, ventilation, heating or cooling arrangements or the like
- A47C7/74—Adaptations for incorporating lamps, radio sets, bars, telephones, ventilation, heating or cooling arrangements or the like for ventilation, heating or cooling
-
- 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
-
- 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
-
- 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
- B60N2/5657—Heating or ventilating devices characterised by convection by air blown towards the seat surface
-
- 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
- B60N2/5678—Heating or ventilating devices characterised by electrical systems
- B60N2/5685—Resistance
-
- 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
- B60N2/5678—Heating or ventilating devices characterised by electrical systems
- B60N2/5692—Refrigerating means
-
- 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
- B60N2/64—Back-rests or cushions
- B60N2/66—Lumbar supports
Definitions
- the present invention relates to an air ventilation and conditioning apparatus for seats in general, and in particular vehicle seats.
- the automotive seat market faces the challenge of the high demand for comfort. This not only involves stability and position on the seat but also temperature and moisture of the seat. Heating and cooling add tremendous comfort to the customers as they adapt to the climatic situation and the body temperature.
- a solution to the challenges described above is to utilize a polyester fiber fill product in conjunction with, or replacing, the conventional foam bun.
- Key advantages for the fiber support include improved breathability (eliminating perspiration and humidity from under occupant) as well as the fact that the material can be recycled, is lighter than foam, and provides improved noise attenuation, all while still providing mechanical properties equivalent to those of foam.
- the present invention is a seat heat, cool, and ventilation system designed to operate with a vehicle seat, preferably a vehicle seat with an integrated comfort system.
- the seat heat, cool, and ventilation system includes a meshwork of plastic fibers, preferably polyester, fused together in such a manner as to permit airflow therethrough, the meshwork makes up at least part of the seat cushioning material.
- the meshwork in a preferred embodiment is encapsulated in a relatively air-impermeable compartment having a limited number of holes, so that air forced into the compartment exits in a limited region of the seat, preferably where the occupant contacts the seating surface.
- FIG. 1 is a perspective view of an integrated comfort seat
- FIG. 2 is a side view of an integrated comfort seat
- FIG. 3A is a cross-section of a fiber pad with open fiber construction
- FIG. 3B shows a cross-section of a fiber pad with an impermeable barrier layer or sealed layer construction
- FIG. 3C shows a cross-section of a fiber pad with a semi-permeable barrier layer
- FIG. 4A shows a side view of one embodiment of an integrated comfort seat
- FIG. 4B shows a rear view of one embodiment of an integrated comfort seat
- FIG. 4C shows a side view of another embodiment of an integrated comfort seat
- FIG. 4D shows a side view of a manifold overmolded into place
- FIG. 4E shows a side view of a cushion edge that is overmolded with foam
- FIG. 4F shows a side view of the end of a manifold embedded in a base pad
- FIG. 4G shows a side view of a flange that is attached to the air-permeable fiber ventilation layer
- FIG. 4H shows a side view of a wire overmolded into a foam support pad and attached via a ring to the trim layer;
- FIG. 5A shows a multilayer arrangement of air-permeable fiber mesh pads with fasteners to hold the pads in place, having a heat-sealed edge;
- FIG. 5B shows a multilayer arrangement of air-permeable fiber mesh pads with fasteners to hold the pads in place, having a heat-sealed edge, with an air-permeable heating layer between the two fiber layers;
- FIG. 6A shows a multilayer arrangement of air-permeable fiber mesh pads, with a sewn edge
- FIG. 6B shows a multilayer arrangement of air-permeable fiber mesh pads, with a sewn edge, with an air-permeable heating layer between the two fiber layers;
- FIG. 7 shows one embodiment of an integrated comfort seat, showing the use of an optional guard and filter to diffuse air coming from the air-moving device;
- FIG. 8 shows one embodiment of an integrated comfort seat using a belt-style lumbar support
- FIG. 9A shows an embodiment of an integrated comfort seat using a belt-style lumbar support
- FIG. 9B shows a front view of one embodiment of a comfort module based on a belt-style lumbar support
- FIG. 9C shows a rear view of an embodiment of a comfort module based on a belt-style lumbar support
- FIG. 9D shows a top view of an embodiment of a comfort module based on a belt-style lumbar support
- FIG. 10A shows a front view of an embodiment of an integrated comfort seat using a wire flex mat support
- FIG. 10B shows a rear view of an embodiment of an integrated comfort seat using a wire flex mat support
- FIG. 11A shows a rear view of an embodiment of an integrated comfort seat using a belt-style lumbar support
- FIG. 11B shows a front view of an embodiment of an integrated comfort seat using a belt-style lumbar support
- FIG. 12A shows a front view of an embodiment of an integrated comfort seat using a flex mat lumbar support
- FIG. 12B shows a rear view of an embodiment of an integrated comfort seat using a flex mat lumbar support
- FIG. 13 shows an embodiment of an integrated comfort seat wherein the support pad is a fiber mesh pad
- FIG. 14 shows an embodiment of an integrated comfort seat wherein the support pad and bolsters are fiber mesh pads
- FIG. 15 shows an embodiment of an integrated comfort seat wherein the ventilation layer and second, or outer, layer of fiber mesh are produced together as a single product
- FIG. 16 shows an embodiment of a comfort module based on a flex mat support
- FIG. 17A shows a side view of one embodiment of an integrated comfort seat
- FIG. 17B shows a perspective view of one embodiment of an integrated comfort seat
- FIGS. 18A-18D show various embodiments of integrated comfort seats
- FIG. 19A shows an anchor connector for attaching seat trim material to a wire flex mat
- FIG. 19B shows seat trim material attached to a wire flex mat
- FIG. 19C shows seat trim material attached to a wire flex mat with the air-permeable fiber ventilation layer going around the attachment point
- FIGS. 20A-20C show various embodiments of integrated comfort seats
- FIG. 21 shows an embodiment of a control module for an integrated comfort seat
- FIG. 22 shows another embodiment of a control module for an integrated comfort seat
- FIG. 23A shows an embodiment of a thermoelectric module for an integrated comfort seat
- FIG. 23B shows another embodiment of a thermoelectric module for an integrated comfort seat
- FIG. 23C shows another embodiment of a thermoelectric module for an integrated comfort seat
- FIG. 23D shows another embodiment of a thermoelectric module for an integrated comfort seat.
- An integrated comfort seat 100 comprises an ergonomic support device 110 such as a lumbar support 120 as well as a cushion 130 having an air-permeable ventilation layer 140 ( FIGS. 1-2 ).
- cushion 130 also comprises a second layer 220 of fiber, as discussed below.
- an air-moving device 150 such as a fan or blower.
- integrated comfort seat 100 comprises one or more comfort modules 105 , each having one or more heat, cool, ventilate, and ergonomic support features, attached to a seat frame 107 .
- Cushioning and trim material may be integrated into comfort modules 105 , may be integral to seat frame 107 , or may be added to seat 100 after assembly of comfort modules 105 .
- Other methods of assembling the disclosed comfort modules 105 to produce an integrated comfort seat 100 are possible and are within the scope of the invention.
- ergonomic support device 110 is overlaid with one or more support pads 160 , which in turn are overlaid with the air-permeable ventilation layer 140 .
- foam such as urethane foam
- a preferred embodiment utilizes a fibrous meshwork 170 comprising a non-woven polyester fiber fill, the manufacture and use of which is described in detail below.
- fibrous mesh In contrast to fibrous mesh, current foam technologies have limitations in these applications as they do not readily permit free air movement through the product and have high levels of thermal mass, which decreases the effect of heating or cooling on the surface until the foam reaches the required temperature.
- the apparatus and methods of assembly disclosed herein are adaptable for use with a number of different ergonomic support devices in general and in particular to lumbar support devices such as are mounted on a seat back, including the numerous archable pressure surfaces ( FIG. 16 ), belt-style lumbar supports ( FIG. 11A ), and flex mat wire-based supports ( FIG. 10A ) that are well known to those skilled in the art. Also, the apparatus and methods are adaptable for use with lumbar supports and other ergonomic devices that are programmed to provide massage by repeated cycling of the adjustment mechanisms.
- a foam bun is used for structural purposes as a support pad 160 while air is circulated through the ventilation layer 140 comprising fibrous meshwork 170 disposed on top of the foam bun.
- one or more holes 180 are formed in the foam bun to permit air flow 152 through the foam to fiber mesh ventilation layer 140 ( FIG. 2 ).
- seat 100 has lateral bolsters 190 made of foam, laterally disposed on either side of the seat back ( FIG. 2 ).
- foam support pads 160 underlying the main seating surface In another embodiment the foam support pads 160 underlying the main seating surface can be replaced with additional fiber mesh pads ( FIG. 13 ).
- the additional fiber mesh pads can optionally be circulated with air or not, depending on the application.
- the foam-based lateral bolsters 190 can also be replaced with fiber mesh pads ( FIG. 14 ), again with optional circulation of air through the fiber-based lateral bolsters 190 .
- the fibrous mesh ventilation layer 140 is encapsulated by a non-permeable barrier layer 148 of air-tight material(s) such as non-permeable plastic sheeting ( FIG. 3B ).
- the air-tight encapsulation has a limited number of openings, such as hole 180 which is provided for air intake through via air-moving device 150 along with those openings that are provided for exhaust through one or more holes or slits 200 .
- air-moving device 150 such as a fan or blower is disposed so as to move air into the cavity of ventilation layer 140 formed by the encapsulation.
- the sheeting or other encapsulating material 148 has one or more distribution holes or slits 200 to permit air to move out towards the seat occupant.
- Encapsulating the mesh and providing air holes in the sheeting 148 proximal to the seat occupant has the effect of focusing air flow 152 towards certain areas, which in a preferred embodiment includes the areas where the occupant's body contacts the seat surface.
- a seat trim layer 210 needs to be made from inherently-breathable materials or perforated leather and in one embodiment is sewn together with a second layer 220 of fiber along a sewn ( FIGS. 5A, 5B ) or heat-sealed ( FIGS. 6A, 6B ) region 222 , second layer 220 helping with air distribution and homogeneity at the surface of seat 100 .
- second layer 220 is made from polyester fiber with a thickness of approximately 6 to 10 mm with different densities and provides softness and improved breathability at the seat surface, as well as improved air diffusion and distribution.
- second layer 220 of fiber i.e.
- the width of sewn or heat-sealed region 222 along the edge of the fiber pad will depend on a number of factors such as the density of fibers and in one embodiment is approximately 10 mm wide all around ( FIGS. 5A, 5B , 6 A, 6 B).
- the outer, seating surface of ventilation layer 140 is partially sealed, e.g. by repeated applications of heat to fuse fibers together at the surface, so as to have a limited number of holes for air to escape.
- air moving from air-moving device 150 will be deflected and diffused as it moves into ventilation layer 140 , since there are a limited number of exit points. This also has the effect of forcing out similar amounts of air across the entire ventilation layer 140 rather than permitting a disproportionate amount of air to exit ventilation layer 140 in the vicinity of air-moving device 150 .
- the multilayered fiber product 226 with or without seat trim material such as leather attached, can also be manufactured as a separate product for installation on top of conventional seat foam buns, for use alone or as part of an active heat, cool, and ventilate system ( FIG. 15 ).
- a fan, blower, or other type of air-moving device 150 is attached to a back support module 230 using known fastening means.
- air-moving device 150 blows air out radially and into a manifold 240 ( FIG. 4B ), the radial disposition of the fan exhaust permitting the system to achieve a thinner profile.
- support pad 160 is divided into one or more vertically-adjacent sections 162 by at least one horizontally-disposed channel 164 , to permit independent movement of some sections 162 so as to accommodate the movement of ergonomic support device 110 .
- One consequence of splitting support pads 160 is that ventilation layer 140 is also divided into multiple, non-contiguous sections, each of which must receive a supply of air.
- air-moving device 150 is attached to the upper half of back support module 230 , with air being carried to the lower half by manifold 240 or other air-tight pipe, hose, or tubing ( FIG. 4A, 4B ).
- ventilation layer 140 is present only on the lower portion of the back support, and thus there is no requirement for manifold 240 ( FIG. 4C ).
- the fan, blower, or other air-moving device 150 is attached directly to lumbar support device 120 ( FIGS. 2, 8 , 10 A, 10 B).
- one or more fans, blowers, or other air-moving devices 150 are attached to a wire flex mat support 250 and flex mat support 250 is pushed forward in the lumbar region by an archable pressure surface-type lumbar support 120 ( FIGS. 16, 17A , 17 B, 18 A, 18 B).
- a guard 260 with an optional filter is placed over the output region of air-moving device 150 to filter and diffuse the air, thus preventing direct ‘read-through’ of the blown air onto the seat occupant's body ( FIG. 7 ). Instead the air is spread more evenly throughout the foam pad and therefore throughout the seating surface for improved comfort.
- the support systems of the present invention are separated into upper and lower portions by a horizontal trough, trench, or channel 164 ( FIGS. 4A, 4B ).
- the lower portion has associated therewith an adjustable lumbar support 120 , with channel 164 separating the upper and lower portions into independently movable sections.
- the sections of ventilation layer 140 in the upper and lower portions are separate from one another ( FIG. 4A ) while in other embodiments ventilation layer 140 runs continuously between the lower and upper portions ( FIGS. 16, 17A , 17 B).
- air must be delivered separately to each portion ( FIG. 4A ), for example using manifold 240 as described above.
- ventilation layer 140 curves around and past channel 164 ( FIGS. 16, 17A , 17 B), although the curves must be gradual enough to prevent creasing of ventilation layer 140 , which could restrict air flow.
- a single air-moving device 150 is sufficient to deliver air to the entire ventilation layer 140 ( FIG. 16 ), although more than one can nonetheless be employed.
- the seat cover or trim layer 210 material can be anchored directly to the back support structure, particularly when ventilation layer 140 is separate from trim layer 210 material ( FIGS. 19A-19C , 20 A- 20 C).
- a specialized anchor connector 270 attaches to seat trim layer 210 material and to the back support structure, for example to a wire that is part of wire flex mat back support 250 ( FIG. 19A ).
- seat trim layer 210 is anchored to a wire 280 that is embedded in the seat foam, for example by overmolding of the foam onto wire 280 , wire 280 being anchored to trim layer 210 by a ring 282 ( FIG. 4H ).
- the back support is divided into three portions to accommodate a centrally-positioned adjustable lumbar support 120 , with two separate horizontal channels 164 dividing the back support into lower, middle, and upper portions ( FIGS. 12A-12B ).
- air is provided to each separate section of ventilation layer 140 by individual air-moving devices 150 being associated with each portion ( FIGS. 12A-12B ).
- ventilation layer 140 is encapsulated by sealing the edges by sewing or heat sealing ( FIGS. 5A, 5B , 6 A, 6 B) and by fusing the fibers at the base of the pad by repeated cycles of heat application.
- the outer portion of the seat pad is covered with an air-permeable seat trim material such as an inherently air-permeable fabric or an impermeable material such as leather that has holes or slits 200 therein for allowing air passage ( FIGS. 17A, 18A , 18 C, 18 D).
- the holes or slits may be situated so as to coincide with the likely areas of contact between the seat occupant's body and the trim material.
- the ventilation air moves through an optional, air-permeable heating layer 290 and through seat trim layer 210 .
- Seat trim layer 210 may be inherently air-permeable material, such as cloth, or may be a relatively impermeable material such as leather that has been made permeable by creating holes or slits in the material.
- Air-permeable heating layer is preferably disposed between ventilation layer 140 and seat trim layer 210 .
- the heating material can be of conventional construction, such as resistance wire, carbon fiber, or conductive inks or polymers as is suitable.
- the attachment of the heater to the fiber pad can be achieved in conventional means such as double-sided adhesive, or by other suitable means known in the art.
- the heating layer comprises a number of different heating technologies, as described below.
- warm air is provided to seat 100 by blowing in heated air from another source such as a thermoelectric device (TED) 300 or ambient air, if the ambient air is substantially warmer than seat 100 .
- TED thermoelectric device
- the respective structural supports may be either separate pieces or may be a single piece that is hinged at the transition between the seat back and seat base.
- FIGS. 3A-3C The basic construction of the fiber mesh material of which ventilation layer 140 is comprised is shown in FIGS. 3A-3C .
- polyester fibers 142 are formed together into a mat, or fibrous meshwork 170 .
- Fibers 142 bond to each other at points of contact through a heating process, for example by circulating a heated gas such as air through the meshwork.
- a heating process for example by circulating a heated gas such as air through the meshwork.
- random open passages 144 are created which allow air to move through fibrous meshwork 170 .
- fibers 142 are dense and rigid enough to provide support without collapsing.
- the density of fibrous meshwork 170 can be varied, as well as to a degree the direction of fibers 142 .
- the technology to make the basic fiber and to bond fibers together is well known to those skilled in the art.
- Fibers 142 can be manufactured to different densities and thicknesses in order to have the air permeability necessary for a complex system.
- fibers 142 can be processed, for example by thermoforming, to different seat shapes for various designs in body position.
- fiber mesh pad layers are overmolded with foam 310 at the edges to produce a finished appearance and to sculpt seat 100 to a desired shape and appearance while still maintaining comfort and structure ( FIGS. 4A, 4C , 4 E, 4 F).
- the top of ventilation layer 140 is also overmolded with foam 310 , which in one embodiment is a relatively thin layer that permits air to flow through. The additional thin layer of foam can be used to add comfort as well as to further shape seat 100 , while remaining thin enough so that it does not inhibit air flow.
- An additional feature that can be created with the fiber product is that of a semi-permeable barrier layer 146 on one side ( FIGS. 3C, 5A , 6 A).
- a semi-permeable barrier layer 146 on one side ( FIGS. 3C, 5A , 6 A).
- the polyester By applying heat to one side of the fiber, the polyester can be reheated, melted and then cooled to form an almost continuous air barrier.
- This feature can be used in applications for heating and cooling in seats.
- the fiber can be a bi-layer product, with each layer having different densities and fiber types.
- the fiber pad is connected to support pads 160 by double-sided, peel and stick adhesive or mechanical fastening such as hook and loop fasteners or other suitable fasteners 224 ( FIGS. 5A, 5B ).
- the fiber pad is made by mixing polyester fibers having different density and thickness to create the appropriate level of support for comfort seating while still allowing air permeability through the seat surface.
- heating is provided by an electrical heater located between the fiber pad and the cover.
- the heating material can be of conventional construction, and use resistance wire, carbon fiber, conductive inks or polymers as is suitable.
- the attachment of the heater to the fiber pad can be achieved in conventional means such as double-sided adhesive, or by unique means which is afforded by the use of a fiber pad.
- air-permeable heating layer 290 can be situated at several different levels: above, below, or between the fiber mesh pad layers. In general air-permeable heating layer 290 should be in-line with air flow to the surface of seat 100 or at least adjacent to the path of flowing air in order for there to be an effective transfer of heat from the heating layer to the air and subsequently to the seat occupant.
- comfort module 105 An alternative to integrating the heat and cool features directly into comfort module 105 is to import conditioned air from another source such as the vehicle's heating and air conditioning system or from a standalone heat/cool device.
- thermoelectric device 300 comprises a thermoelectric module (‘TEM’) 302 , such as a Peltier device, plus a heat sink 304 .
- TEM thermoelectric module
- the cool side of TEM 302 is made warmer by blowing room temperature air across a heat sink attached to the cool side, then the warm side will become hot. Similarly the warm side can be cooled to room temperature to make the cool side much colder.
- the Peltier device can be used to provide either heating or cooling, depending on which side of TEM 302 is maintained near room temperature, with the resulting hot or cold air being circulated into the seat.
- the Peltier device can also be switched between heating and cooling by reversing the polarity of the voltage applied to the device.
- heating is provided by a layered product while cooling is achieved with TED 300 as described above.
- the TED device can be situated anywhere in the path of the air leading to the seat, either upstream or downstream of the fan or blower ( FIG. 2 ), provided that all or most of the air leading to the seat moves across the TED and its associated heat sink 304 .
- the TED has multiple layers to improve heating and/or cooling functionality.
- a manifold 240 is used to distribute air to distinct compartments in ventilation layer 140 .
- One opening of manifold 240 is attached to a fan or other air-moving device 150 which forces air into the manifold.
- the output ports of manifold 240 then lead into the separate air compartments created by the mesh fibers.
- manifold 240 which in one embodiment is made of plastic, may be overmolded within the foam support pads 160 of the seat base ( FIG. 4A, 4C ). Ventilation layer 140 would subsequently be laid on top of support pads 160 .
- access ports for manifold 240 may be molded or cut into support pads 160 to allow subsequent insertion of manifold 240 .
- manifold 240 is placed adjacent the foam support pads 160 in the area of channel 164 such that the openings of manifold 240 are in communication with the adjacent ventilation layer 140 , and manifold 140 is then overmolded in place.
- This overmolding can be performed in conjunction with other overmolding steps such as at the edges of ventilation layer 140 .
- the opening of manifold 240 may be a circular cross-section at the end of a tube or may widen into an elongated slit, which in one embodiment has a length comparable to that of the trench.
- the distal ends of manifold 240 have ridges or screw-type threads 244 to engage with the foam, which help to keep the manifold in place in the foam ( FIG.
- a flange 242 is bonded to ventilation layer 140 , flange 242 making a connection, e.g. a snap fit, to the end of manifold 240 or other air-delivery duct 370 ( FIG. 4G ).
- ventilation layer 140 and second layer of air-permeable fiber 220 are combined into a single multilayered ventilation product 226 which can be installed on conventional seats ( FIG. 15 ).
- the fiber pads in one embodiment are made of the synthetic material polyester, specifically polyester fiberfill. Combining various types of fiber and bonding methods enables the development of products that achieve desired levels of comfort and durability for the automotive seat market, while still permitting air to permeate the pad when a person is sitting on it.
- Polyester is recyclable, non-allergenic, and resists growth of mold and mildew.
- Polyester fiberfill is available in bright, semidull, and dull lusters. The product most often used is semidull and optically brightened. A clean white batting color can improve the presentation of products utilizing lightly colored fabrics.
- Polyester can be treated with a variety of chemicals; to give it non-flammable characteristics, make it anti-microbial and improve aesthetics and durability. Polyester batting can be made to pass all current mattress flammability standards.
- polyester (PET) fiber products will not yellow and become brittle when exposed to UV light nor does it produce the high level of toxic gases when exposed to heat.
- the three methods of bonding are plain, resin bonded and low melt bonded, with a preferred embodiment employing a low melt bonding method.
- Low melt products are produced with a combination of polyester fibers with different melting temperatures. It can be made with slickened fibers, offering both aesthetics and durability. Using a low melt bonding process, densified batting increases durability and offers greater height recovery.
- Layering of fibers can be performed by combining fibers of differing deniers, slick/dry fiber combinations, hollow and solid fibers, and blends of any or all of these, to achieve desired quality, price, and performance characteristics.
- Blends of other fibers including natural materials such as wool, silk, and cashmere can also be mixed with pyron and premium flame retardant (FR) fibers to achieve various results.
- Pyron is a highly technical FR fiber that consists of oxidized poly-acrylic-nitrile fibers. Those thermally stable oxidized fibers, produced under high heat, resist flames. The fibers char in place and pull heat away from the flame source.
- various results can be obtained by layering different fibers, for example using a bi-layered product as mentioned above.
- the top layer for example second layer 220 , can also include exotic fibers such as wool and silk to enhance comfort.
- comfort module 105 a single control module 330 controls all of the seat comfort options disclosed herein.
- assembly and installation of the comfort components into a seat is simplified and thus costs are lowered.
- modular assembly also eliminates the problems that can arise from a manufacturer having to fit together various parts from different suppliers.
- all of the seat back support and comfort elements are integrated onto a single device (e.g. FIGS. 1, 17B ) which can then be readily attached to seat frame 107 .
- the fiber-based air distribution pads described herein are lightweight, recyclable, and resistant to mold and mildew growth, to name a few benefits.
- control module 330 can be used to control all options of seat 100 such as massage, heating, cooling, and ventilation, and all options can be connected to one main body harness.
- control module 330 provides for pre-heating or pre-cooling of seats; in another embodiment the fan or blower can be powered up in heating mode for a few seconds to improve seat air distribution and heat-up time.
- air-moving device 150 runs continuously for a period of time after the cooling elements are switched to the off mode.
- control module 330 is programmed to run air-moving device 150 at a lower power and thus lower speed (e.g.
- seat 100 can be pre-cooled or pre-warmed, as conditions dictate, if the temperature of the ambient air or seat 100 exceeds a preset limit, with the pre-cooling or pre-warming being triggered by opening the vehicle door.
- pre-cooling of seat 100 is triggered when the seat or ambient air temperature is above 25° C.
- the duration of pre-heating or pre-cooling is determined by a predetermined temperature drop or a preset amount of time.
- FIG. 21 shows one embodiment of controller 330 , employing a rotating selector knob. Other methods of selecting options such as heat and cool and the temperature thereof, including push buttons with or without light-emitting diodes, are also encompassed within the invention.
- control module 330 uses temperature feedback from those parts of seat 100 that are to be heated or cooled such as the base cushion or back layer to control the current and/or voltage to air-permeable heating layer 290 and/or thermoelectric device 300 in-line with air-moving device 150 to reach a user-selectable temperature in a minimum time and to keep that temperature constant.
- a PID Proportional, Integral and Derivative
- the fan speed is reduced to decrease the noise if the blower is turned on and to reduce any user discomfort that might arise from excess air movement.
- the heater which in one embodiment is air-permeable heating layer 290 , will be turned on by the PID controller.
- air-moving device 150 will blow air to the occupant at low speed and, after a short period of time, in an intermittent manner.
- a delay period typically 30 seconds
- air-moving device 150 will blow air to the occupant at low speed and, after a short period of time, in an intermittent manner.
- a PTC-based heater 320 can be a separate heater inside an air duct 370 attached to heat sink 304 , and can be used alone or in conjunction with TED 300 operating in heating mode. In this case, air-moving device 150 will blow the air at low speed at the beginning to permit the air to have enough time to be heated up.
- TED 300 In cooling mode, TED 300 will be powered and air-moving device 150 will blow cold air to the seat occupant.
- the optionally PID-based control module 330 will control the current and/or voltage to thermoelectric device 300 as well as the speed of air-moving device 150 . If the ambient temperature inside the vehicle is considerably lower than the temperature of seat 100 , which in one embodiment is a difference of between 10 to 20 Celsius degrees lower, TED 300 will be shut off and seat 100 will be cooled by blowing ambient air at maximum speed to save energy.
- TED 100 When the ambient temperature within the vehicle is closer to the temperature of seat 100 , which in one embodiment is a difference of between less than 10 to 20 Celsius degrees, TED 100 will be powered and thus air that is significantly lower than ambient temperature will be blown to the seat surface to effect cooling of seat 100 .
- a temperature sensor 340 is placed near the inlet of air-moving device 150 for a more accurate measurement of the temperature of the ambient air that will be delivered to the surface of seat 100 , as well as to achieve a more compact, modular design overall.
- temperature sensor 340 is placed directly beneath seat trim layer 210 to measure the temperature of seat trim layer 210 itself. In this embodiment temperature sensor is isolated from air flow 152 to sense the temperature of seat trim layer 210 material alone ( FIG. 2 ).
- a user control interface 334 such as push buttons, knobs and indicators such as light-emitting diodes (LEDs) can be mounted on seat 100 or the vehicle's dash or can stand alone through wired or wireless transmission.
- a control signal can also be obtained from the vehicle heater and air conditioner control settings, thus eliminating the need for a separate control module.
- a programmable timer 332 ( FIG. 22 ) can be integrated into control module 330 so that seat 100 can be heated up or cooled down at a certain preset time, for example a particular time of day, and the occupants can immediately enjoy the comfort when they enter the vehicle.
- a signal from the door unlock by a remote entry system can also be used to turn on the system automatically.
- the module will turn the system on heating or cooling mode based on conditions manually preset by the user, or alternatively based on factory pre-set conditions.
- control module 330 will activate the cooling mode if the ambient temperature is higher than 25° C. (user-configurable) and it will activate the heating mode if the ambient temperature is lower than 20° C. (user configurable).
- the system will shut off to save power.
- a temperature sensor 340 attached to TED 300 or its heat sink 304 will be used to prevent overheat of the thermoelectric module, or TEM, 302 .
- Air-moving device 150 will remain on for a certain time (typically 30 seconds) to bring heat sink 304 of TED 300 closer to ambient temperature and thereby prevent any possible build-up of moisture on the cooled TED 300 , especially in hot and humid summer weather, before shutting off completely.
- a memory feature can be added to store the preferred temperature settings for each of several seat occupants.
- the seat temperature control module 330 is made to operate without a user-adjustable control module, i.e. it is made to be self-adjusting. In this embodiment a user's input would be limited to selecting whether to heat or cool the seat, with the system otherwise being self-adjusting.
- a PTC-based (Positive Temperature Coefficient thermistor) heater 320 wherein a set-point thermistor is integrated into a heating device to maintain a factory-determined temperature, to provide heat either through the air or directly transferred to the occupant, the system will maintain a certain temperature and will not overheat.
- a PTC thermistor 350 is used to limit the power to TED 300 even where TED 300 is used for heating, to provide overheat protection.
- a Negative Temperature Coefficient thermistor (NTC) 360 ( FIG. 22 ) will limit the current to TED 300 when the temperature inside air duct 380 , near the occupant, or in the ambient air reaches a certain point.
- NTC 360 When the temperature surrounding NTC 360 decreases to a certain point the resistance of NTC 360 increases, thereby reducing power to TED 300 and preventing overcooling.
- PTC thermistor 350 will be put on the ‘hot’ side of TED 300 to limit the power to TED 300 .
- An optional timer can be added to shut off the system after a pre-defined amount of time.
- each PTC heater 320 can be of a different power level, such that turning on a first heater puts the system in low heating mode; turning on a second heater and turning off the first puts the system into medium heating mode; and turning on a third heater while the first and second are off puts the system into high heating mode ( FIG. 22 ).
- NTC thermistors 360 are put in air duct 370 to sense the cold air in cooling mode ( FIG. 22 ).
- PTC thermistors 350 can be put on the hot side of TED 300 either close to or touching heat sink 304 ( FIG. 23A ) or put in the exhaust air duct 370 .
- the wiring for the PTC or NTC thermistors can be configured to be either in parallel or serial or any combination, as is well known to those skilled in the art.
- Positive temperature coefficient thermistors (PTCs) 350 can also be used for overheat protection, even in embodiments in which a user-operable control system is employed.
- a PTC thermistor 350 can be used to prevent TED 300 from overheating in case of control module failure, blower failure, or air duct 370 being blocked, among various possibilities.
- air-moving device 150 When TED 300 is working (in this case, not with a PTC in self-adjusting mode), air-moving device 150 must also work to cool down the ‘hot’ side of TED 300 . If for any reason air-moving device 150 were to stop working while TED 300 was still powered, TED 300 would overheat, which could cause damage to the system or even seat 100 and may cause safety issues.
- Two PTCs 350 can be put anywhere near the surface of TED 300 , one of each on both sides, and put TED 300 in serial with PTC 350 ( FIG. 23A ). This way whether TED 300 is in heating or cooling mode the PTC thermistor 350 will shut off the power if either side of TED 300 is overheated. The PTC thermistor 350 will reset itself when the overheating condition is removed.
- thermoelectric modules that are used here are subject to the Seebeck effect which will generate a voltage because of the temperature difference between the two sides of the thermoelectric module (TEM).
- TEM 302 When TEM 302 is powered, the current generates a temperature difference between the two sides. If for any reason heat sink 304 that is attached to TEM 302 is not cooled down, e.g. due to blower failure, air duct blockage etc., the temperature difference between the two sides will increase, leading to an increase in voltage due to the Seebeck effect. The result is that the current through TEM 302 will decrease.
- a current sensor will monitor the current to TEM 302 and the module will shut down or lower the power to TEM 302 if the current is less than 0.5A (typically, this value will depend on the specific type of module) of the normal running current. That is, since current running through the two sides of TEM 302 is proportional to the temperature, the temperature of TEM 302 can be monitored indirectly by monitoring current. When the current running through TEM 302 drops below a certain level, this is taken to indicate an excessive temperature difference between the two sides of TEM 302 and power is decreased or shut off to TEM 302 as necessary. In this way production costs for the control system can be reduced by eliminating temperature sensors and the wires to these sensors.
- 0.5A typically, this value will depend on the specific type of module
- TED 300 and air-moving device 150 can be configured to share the same power leads 372 , thereby simplifying production and reducing costs, particularly since TED 300 and air-moving device 150 are usually located in a single housing 376 ( FIG. 23C ).
- One problem to overcome in such a configuration is that the polarity of the voltage sent to TED 300 may be reversed in order to switch between heating and cooling, while air-moving device 150 requires a uniform polarity voltage.
- a bridge rectifier or other similar circuit 374 known to those skilled in the art can be used to provide a uniform polarity voltage to power air-moving device 150 regardless of the polarity of the incoming DC current ( FIG. 23C ).
- a control signal from control module 330 is used to control the direction of the DC current through TEM 302 ( FIG. 23C ).
- TEM 302 is only used for cooling while heating is provided by separate heater, then no polarity switching is needed and the blower and the TED can be put in parallel to share the same power feeds.
- a control signal from control module 330 can change the speed of air-moving device 150 ( FIGS. 23C, 23D ).
- PTC heaters 320 can be put on one side of TED 300 where the air is blown to the seat surface to supplement the heat generated by TED 300 ( FIG. 23B ).
- PTC-based heater(s) 320 can be put in air duct 370 , either downstream ( FIG. 23C ) or upstream ( FIG. 23D ) of TED 300 .
- PTC heater(s) 320 will be powered up first.
- TED 300 will be powered up gradually with the decrease of the current draw from PTC heater(s) 320 , maintaining an overall current draw within the limit. The advantage is to achieve a faster heat up time and power efficiency.
- the switchover from heating with PTC heater 320 to TED 300 can be determined either as a function of time (which in one embodiment is fifteen seconds after startup) or in another embodiment as a function of current draw.
- a PTC heater typically draws more current at initial startup. As it is reaching the stabilized state, it draws a smaller current. The current is monitored so that TED 300 can be switched over so that the total current draw is within a certain predetermined limit. This option can also be used for moisture removal for the TED: 1. switch TED 300 on cooling mode and blow air; 2. turn off TED 300 and turn on PTC 320 to blow warm air across heat sink 304 ( FIG. 23B ); 3. shut off system.
- PTC heater 320 on the ‘hot’ side of TED 300 will generate heat to be transferred to the occupant via forced air, either working with or without TEM 302 . If TEM 302 is also powered to provide the heat, it can be controlled to work at a lower capacity to guarantee it will not overheat. By using two heat sources, heat-up time will be shortened.
- control module 330 will be used by control module 330 to provide overheat protection. If overheating is detected, power to TEM 302 will be shut off.
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
- Air-Conditioning For Vehicles (AREA)
- Seats For Vehicles (AREA)
Priority Applications (1)
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US11/348,701 US20060175877A1 (en) | 2005-02-07 | 2006-02-07 | Heat, cool, and ventilate system for automotive applications |
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US65076305P | 2005-02-07 | 2005-02-07 | |
US11/348,701 US20060175877A1 (en) | 2005-02-07 | 2006-02-07 | Heat, cool, and ventilate system for automotive applications |
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US20060175877A1 true US20060175877A1 (en) | 2006-08-10 |
Family
ID=36405982
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US11/348,701 Abandoned US20060175877A1 (en) | 2005-02-07 | 2006-02-07 | Heat, cool, and ventilate system for automotive applications |
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US (1) | US20060175877A1 (ko) |
EP (1) | EP1851087A1 (ko) |
JP (1) | JP4926078B2 (ko) |
KR (1) | KR100909033B1 (ko) |
CN (1) | CN101115642B (ko) |
WO (1) | WO2006086320A1 (ko) |
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Also Published As
Publication number | Publication date |
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CN101115642A (zh) | 2008-01-30 |
KR100909033B1 (ko) | 2009-07-22 |
CN101115642B (zh) | 2011-01-05 |
EP1851087A1 (en) | 2007-11-07 |
JP4926078B2 (ja) | 2012-05-09 |
JP2008529872A (ja) | 2008-08-07 |
WO2006086320A1 (en) | 2006-08-17 |
KR20070098956A (ko) | 2007-10-05 |
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