A bed comprises a support arrangement (1) adapted to provide upper support surfaces for and carry a person lying in the bed through an upper limitation thereof. A suction device is arranged to generate an air flow from the contact surfaces between a person lying in the bed, through the interior of t
A bed comprises a support arrangement (1) adapted to provide upper support surfaces for and carry a person lying in the bed through an upper limitation thereof. A suction device is arranged to generate an air flow from the contact surfaces between a person lying in the bed, through the interior of the support arrangement and out thereof for obtaining a ventilation of the bed space under the person and suction of air away from the bed space through the suction device when a person rests in the bed.
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The invention claimed is: 1. A bed, comprising a support arrangement (1,2,3) having an upper support surface (8) structured and arranged to support an individual lying thereon, at least a portion (5,6) of said upper support surface (8) being permeable to air, an opening (17) arranged through said s
The invention claimed is: 1. A bed, comprising a support arrangement (1,2,3) having an upper support surface (8) structured and arranged to support an individual lying thereon, at least a portion (5,6) of said upper support surface (8) being permeable to air, an opening (17) arranged through said support arrangement (1,2,3) to exterior surroundings and communicating with said at least air permeable portion (5,6) through an interior (13) of said support arrangement (1, 2,3), a suction device (20) for creating negative air pressure being connectable to said opening (17), such that air is drawn from the exterior surroundings through said at least air permeable portion (5,6) and said interior (13) of said support arrangement (1,2,3) and out through said opening ( 17), to thereby draw air away from said support surface (8) through said interior (13) when the individual is lying on the bed, and means for controlling temperature surrounding an individual lying upon the bed by solely controlling the suctioning of air and comprising a control unit (23, 31) connected to said suction device (20) for controlling the drawing of air through said interior (13) of said support arrangement (1,3), members (28) structured and arranged for measuring temperature of air located in immediate proximity to said support surface (8) of said support arrangement (1,2,3) and coupled to said control unit (23) to forward temperature measurement thereto, such that said control unit (23) controls operation of said suction device (20) depending upon the measured temperature and controls temperature of air surrounding the individual lying upon the bed in the absence of further heating/cooling means. 2. The bed of claim 1, additionally comprising an air-tight material (7) surrounding said at least air permeable portion (5,6) and being structured and arranged to concentrate flow of air from an area of said support surface (8) through said at least air permeable part (5,6), and said support arrangement (1, 2, 3) air-tightly delimiting the interior thereof to only permit air flow therethrough (13) between said at least air permeable portion ( 5, 6) and opening (17). 3. The bed of claim 1, wherein said at least air permeable part (5, 6) comprises a restricted region (9) essentially corresponding to a portion of said support surface (8) structured and arranged to receive any body part of an individual lying thereon. 4. The bed of claim 3, wherein said restricted region ( 9) is structured and arranged to support thighs and a trunk of an individual lying thereon. 5. The bed of claim 3, wherein said restricted region ( 9) is substantially centered in said support surface (8) and has a length, in a longitudinal direction of the bed, of between 0.8 and 1.3 m. 6. The bed of claim 3, wherein said restricted region ( 9) is substantially centered in said support surface (8) and has a width, in a transverse direction of the bed, of between 0.4 and 0.7 m. 7. The bed of claim 1, additionally comprising a group of spring members (12) arranged in the interior (13) of said support arrangement (1, 2, 3) such that air drawn by said suction device (20) through said at least air permeable portion (5,6,9) and said opening (17) passes through said group of spring members (12). 8. The bed of claim 1, wherein said support arrangement ( 1, 2, 3) comprises a mattress (2) and a separate support part (3) structured and arranged to carry the mattress ( 2) thereon, said mattress comprising said at least air permeable portion (5,6) and said separate support part (3) also comprising an air permeable portion (16) surrounded by air-tight boundries (10, 15) and arranged for communicating the interior (13) of the support part (3) with said mattress (2). 9. The bed of claim 1, wherein said support arrangement comprises an integral mattress and support part with the entire support arrangement (1, 2, 3) surrounded by air-tight boundaries which are perforated by said opening (17) and at least air permeable portion (5,6). 10. The bed of claim 1, wherein said air permeable portion (5, 6) comprises through-holes (16) arranged through substantially air-tight material constituting the upper surface (10 ) of said support arrangement (1,3). 11. The bed of claim 1, wherein said air at least permeable portion (5, 6) is constituted by a layer of material having good air permeability. 12. The bed of claim 1, wherein said opening (17) is arranged on a lower side of the support arrangement (1, 2, 3). 13. A bed, comprising a support arrangement (1,2,3) having an upper support surface (8) structured and arranged to support an individual lying thereon, at least a portion (5,6) of said upper support surface (8) being permeable to air, an opening (17) arranged through said support arrangement (1,2,3) to exterior surroundings and communicating with said at least air permeable portion (5,6) through an interior (13) of said support arrangement (1, 2,3), a suction device (20) for creating negative air pressure being connectable to said opening (17), such that air is drawn from the exterior surroundings through said at least air permeable portion (5,6) and said interior (13) of said support arrangement (1,2,3) and out through said opening ( 17), to thereby draw air away from said support surface (8) through said interior (13) when the individual is lying on the bed, a control unit (23, 31) connected to said suction device (20) for controlling the drawing of air through said interior (13) of said support arrangement (1,3), members (28) structured and arranged for measuring temperature of air located in immediate proximity to said support surface (8) of said support arrangement (1,2,3) and coupled to said control unit (23) to forward temperature measurement thereto, such that said control unit (23) controls operation of said suction device (20) depending upon the measured temperature and controls temperature of air surrounding the individual lying upon the bed, additionally comprising a separate compartment (18) situated within the interior (13) of the support arrangement ( 1,2,3) on a lower side thereof and with said opening (17) situated through a wall of said compartment (18), and said suction device (20) is constituted by a fan member (22) situated within said compartment (18). 14. The bed of claim 13, additionally comprising a baffle ( 25, 26) arranged for partially obstructing said opening ( 17) to dampen noise. 15. The bed of claim 1, additionally comprising a conduit ( 30) coupled with said suction device (20) through said opening (17) such that said suction device (20) comprises a fan member (22) remotely located from said support arrangement ( 1, 2, 3). 16. The bed of claim 15, comprising a plurality of separate support arrangements (1', 1", 1'") coupled with said suction device (20) through said conduit (30) such that a single fan member (22) ventilates support surfaces of said plurality of support arrangements (1', 1", 1'"). 17. A bed, comprising a support arrangement (1,2,3) having an upper support surface (8) structured and arranged to support an individual lying thereon, at least a portion (5,6) of said upper support surface (8) being permeable to air, an opening (17) arranged through said support arrangement (1,2,3) to exterior surroundings and communicating with said at least air permeable portion (5,6) through an interior (13) of said support arrangement (1, 2,3), a suction device (20) for creating negative air pressure being connectable to said opening (17), such that air is drawn from the exterior surroundings through said at least air permeable portion (5,6) and said interior (13) of said support arrangement (1,2,3) and out through said opening ( 17), to thereby draw air away from said support surface (8) through said interior (13) when the individual is lying on the bed, a control unit (23, 31) connected to said suction device (20) for controlling the drawing of air through said interior (13) of said support arrangement (1,3), members (28) structured and arranged for measuring temperature of air located in immediate proximity to said support surface (8) of said support arrangement (1,2,3) and coupled to said control unit (23) to forward temperature measurement thereto, such that said control unit (23) controls operation of said suction device (20) depending upon the measured temperature and controls temperature of air surrounding the individual lying upon the bed, additionally comprising members (29) structured and arranged for measuring humidity of air located in immediate proximity to said support surface (8) and coupled to the control unit (23 ) to forward the measurement thereto such that the control unit (23 ) controls the suction device based upon the measured humidity. 18. The bed of claim 17, wherein said temperature and humidity measuring members (28, 29) are structured and arranged to indirectly measure the temperature and humidity by sensing air drawn by said suction device (20) through said at least air permeable portion (5,6) of the upper surface (8) of the support arrangement (1, 2, 3). 19. The bed of claim 1, wherein said control device (23 , 31) is structured and arranged to reverse operation of said suction device (20) for inspiring air into said interior (13 ) through said opening (17) and out through said at least air permeable portion (5,6) of said upper support surface ( 8). 20. The bed of claim 19, additionally comprising a heating element (27) structured and arranged to heat the inspired air when said suction device (20) is reversed by said control element ( 23), to thereby supply heated air immediately above the upper support surface (8). 21. The bed of claim 1, wherein said control device (23 , 31) comprises a hand control (31) for said suction device (20). 22. A bed, comprising a support arrangement (1,2,3) having an upper support surface (8) structured and arranged to support an individual lying thereon, at least a portion (5,6) of said upper support surface (8) being permeable to air, an opening (17) arranged through said support arrangement (1,2,3) to exterior surroundings and communicating with said at least air permeable portion (5,6) through an interior (13) of said support arrangement (1, 2,3), a suction device (20) for creating negative air pressure being connectable to said opening (17), such that air is drawn from the exterior surroundings through said at least air permeable portion (5,6) and said interior (13) of said support arrangement (1,2,3) and out through said opening ( 17), to thereby draw air away from said support surface (8) through said interior (13) when the individual is lying on the bed, a control unit (23, 31) connected to said suction device (20) for controlling the drawing of air through said interior (13) of said support arrangement (1,3), members (28) structured and arranged for measuring temperature of air located in immediate proximity to said support surface (8) of said support arrangement (1,2,3) and coupled to said control unit (23) to forward temperature measurement thereto, such that said control unit (23) controls operation of said suction device (20) depending upon the measured temperature and controls temperature of air surrounding the individual lying upon the bed, additionally comprising an air-tight box (18) situated upon a bottom interior surface of said support structure (1, 2,3), with said opening (17) being situated through a top wall of said box structure (18), said suction device (20) constituted by a fan with impeller (22) situated withing said box structured (18), and a second opening (19) situated through a bottom surface of said box structure (18) to the exterior surroundings. 23. The bed of claim 22, additionally comprising covers ( 25,26) partially obstructing said openings (17, 19) to dampen noise, a heating element (27) situated within said box structure (18), two groups of springs (12) arranged within said interior (13) of said support arrangement (1, 2, 3) with a support member (14) interposed vertically between said two groups of springs (12), and a mattress (2) structured and arranged to be carried by said support arrangement (1,3) and having an air-permeable core layer (5), an air-tight frame (7) surrounding said core layer (5), and a cover layer (6) defining said at least air-permeable portion (9) through said top surface (8) and surrounded by said frame (7). 24. The bed of claim 1, wherein said members (28) are arranged close to said opening (17) to measure temperature of the air suctioned therethrough.
Stroh, Glenn C.; Vrzalik, John H.; Lina, Cesar Z.; Dekruif, Daniel W.; Johnson, Bryan L., Methods and apparatuses for low-air-loss (LAL) coverlets and airflow units for coverlets.
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