Air system for a bed

Abstract

An air system for a bed can include a layer assembly having a head end, a foot end, and first and second sides, with a head portion near the head end, a foot portion near the foot end, and a middle portion between the head portion and the foot portion, the layer assembly. The layer assembly can have a spacer layer comprising spacer material configured to allow for air flow through the spacer material and a cover comprising a cover top layer and a cover bottom layer. The air system can have a distribution manifold that is substantially fan-shaped with a plurality of ribs defining channels and/or is positioned above the cover bottom layer and under the spacer layer. The air system can have first and second flaps with first and second retention features extending from the head and foot ends of the air layer.

Claims

1. An air system for a bed, comprising: a layer assembly including a top layer and a bottom layer that is stitched to the top layer via stitching to define one or more spaces that are configured to allow for air flow between the top and bottom layers, wherein the stitching is substantially symmetric about a centerline axis of the layer assembly; an air supply module configured to heat and cool air, wherein the air supply module has a side-facing outlet; and a hose assembly configured to fluidly connect the layer assembly to the air supply module, the hose assembly comprising: an engine connector having a substantially annular shape configured to mate with the side-facing outlet of the air supply module; a second connector that is substantially annular-shaped; a hose extending between the engine connector and the second connector; and a distribution manifold having a bottom inlet end that is connected to the hose via the second connector, wherein the distribution manifold is partially positioned between the top and bottom layers and extends through a portion of the layer assembly between the top and bottom layers and is configured to allow air to flow from the distribution manifold to the spaces in the layer assembly, wherein the distribution manifold is also partially positioned external to the layer assembly such that the distribution manifold is positioned only partially inside the layer assembly, wherein an outlet of the distribution manifold has a curved bottom edge such that a center of the curved bottom edge extends further than first and second sides of the curved bottom edge, wherein the distribution manifold includes a plurality of ribs configured to direct the air into the spaces in the layer assembly, and wherein the ribs are at least partially positioned between the top and bottom layers and the ribs extend to positions proximate the curved bottom edge of the distribution manifold.

2. The air system of claim 1, further comprising: an air supply module configured to supply the air to the distribution manifold, wherein the air supply module is sized and shaped to be positioned under a bed and the side-facing outlet of the air supply module is configured to face outward when the air supply module is positioned under a bed.

3. The air system of claim 1, wherein the hose is a retractable hose with bellows configured to stretch and contract to increase and decrease a length of a flow path of the hose assembly.

4. The air system of claim 1, wherein the hose is a bellows-style hose with a repeating series of alternating flex points along a length of the hose, the bellows-style hose being configured to expand and contract to increase and decrease a length of a flow path of the hose.

5. The air system of claim 1, wherein the stitching of the top and bottom layers is patterned such that the air is directed to different parts of the layer assembly.

6. The air system of claim 1, wherein the distribution manifold has a width and a depth when viewed from a top of the distribution manifold along an axis extending between the top and bottom layers, wherein the width of the distribution manifold is greater than the depth of the distribution manifold.

7. The air system of claim 1, wherein the distribution manifold defines a substantially vertical flow path at the bottom inlet end, a substantially horizontal flow path at the outlet, and a curved flow path along a curved corner portion.

8. The air system of claim 1, and further comprising: means to connect the air system to the bed.

9. The air system of claim 8, wherein the means is configured to be tucked under a mattress of the bed between the mattress and a foundation of the bed to connect the air system to the bed.

10. The air system of claim 1, wherein an outlet of the distribution manifold has a curved bottom edge such that a center of the curved bottom edge extends further than first and second sides of the curved bottom edge.

11. An air system for a bed, comprising: a layer assembly including a top layer and a bottom layer that is stitched to the top layer to define one or more spaces that are configured to allow for air flow between the top and bottom layers; and a distribution manifold that is at least partially positioned between the top and bottom layers and extends through a portion of the layer assembly between the top and bottom layers and is configured to allow air to flow from the distribution manifold to the spaces in the layer assembly, wherein the distribution manifold includes a plurality of ribs configured to direct the air into the spaces in the layer assembly, wherein the ribs are at least partially positioned between the top and bottom layers and extends through the portion of the layer assembly between the top and bottom layers, wherein the plurality of ribs extends at different angles to distribute the air into the spaces in the layer assembly at the different angles.

12. The air system of claim 11, wherein the distribution manifold includes opposite portions that define an air outlet between the opposite portions, and wherein the plurality of ribs extend between the opposite portions of the distribution manifold.

13. The air system of claim 12, wherein the plurality of ribs define a plurality of air passages through the air outlet between the opposite portions.

14. An air system for a bed, comprising: a layer assembly including a top layer and a bottom layer that is stitched to the top layer to define one or more spaces that are configured to allow for air flow between the top and bottom layers; an air supply module configured to heat and cool air, wherein the air supply module is sized and shaped to be positioned under a bed, wherein the air supply module has a side-facing outlet configured to face outward when the air supply module is positioned under a bed; and a hose assembly configured to fluidly connect the layer assembly to the air supply module, the hose assembly comprising: an engine connector having a substantially annular shape configured to mate with the side-facing outlet of the air supply module; a second connector that is substantially annular-shaped; a distribution manifold having a substantially vertically-extending portion, a substantially horizontally-extending portion, and a corner between the substantially vertically-extending portion and the substantially horizontally-extending portion, wherein the substantially horizontally-extending portion of the distribution manifold is configured to extend through a portion of the layer assembly between the top and bottom layers and is configured to allow air to flow from the distribution manifold to the spaces in the layer assembly, wherein an inlet of the distribution manifold is at a bottom end of the vertically-extending portion and an outlet of the distribution manifold is at an end of the horizontally-extending portion, wherein the distribution manifold tapers from the outlet to the inlet such that the outlet is wider than the inlet, wherein the distribution manifold includes a plurality of ribs at the outlet configured to direct the air into the spaces in the layer assembly; and a bellows-style hose having a first hose end connected to the engine connector and a second hose end connected to the bottom end of the distribution manifold via the second connector, wherein the bellow-style hose is configured to expand and contract to increase and decrease the length of the flow path of the hose and further configured to bend to accommodate the air system being positioned under a bed.

15. The air system of claim 14, and further comprising: means to connect the air system to the bed.

16. The air system of claim 15, wherein the means is configured to be tucked under a mattress of the bed between the mattress and a foundation of the bed to connect the air system to the bed.

17. The air system of claim 14, wherein the engine connector comprises at least one snap fitting.

18. The air system of claim 14, wherein the engine connector comprises a hose connection portion and an air supply connection portion, wherein both the air supply connection portion and the hose connection portion are substantially annular, wherein an outer diameter of the hose connection portion is larger than an outer diameter of the air supply connection portion, and wherein the first end of the bellows-style hose is sized to fit inside the hose connection portion.

19. An air system for a bed, comprising: a layer assembly including a top layer and a bottom layer that is stitched to the top layer via stitching to define one or more spaces that are configured to allow for air flow between the top and bottom layers, wherein the stitching is substantially symmetric about a centerline axis of the layer assembly; an air supply module configured to heat and cool air, wherein the air supply module is sized and shaped to be positioned under a bed, wherein the air supply module has a side-facing outlet configured to face outward when the air supply module is positioned under a bed; and a hose assembly configured to fluidly connect the layer assembly to the air supply module, the hose assembly comprising: an engine connector having a substantially annular shape configured to mate with the side-facing outlet of the air supply module; a distribution manifold that extends through a portion of the layer assembly between the top and bottom layers and is configured to allow air to flow from the distribution manifold to the spaces in the layer assembly, wherein the distribution manifold is partially positioned internal to the layer assembly and partially positioned external to the layer assembly, wherein the distribution manifold includes a plurality of ribs configured to direct the air into the spaces in the layer assembly, and wherein the distribution manifold has a width and a depth when viewed from a top of the distribution manifold along an axis extending between the top and bottom layers, wherein the width of the distribution manifold is greater than the depth of the distribution manifold; and a bellows-style hose having a first hose end connected to the engine connector and a second hose end connected to the distribution manifold, wherein the first hose end is oriented substantially horizontally when the engine connector is mated with the side-facing outlet of the air supply module and the second hose end is oriented substantially vertically when the distribution manifold is connected to the layer assembly and the layer assembly is positioned on a mattress.

20. The air system of claim 19, wherein the engine connector comprises a hose connection portion and an air supply connection portion, wherein both the air supply connection portion and the hose connection portion are substantially annular, wherein an outer diameter of the hose connection portion is larger than an outer diameter of the air supply connection portion, and wherein the first end of the bellows-style hose is sized to fit inside the hose connection portion.

Description

DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a perspective view an example bed and air system used in conjunction with the bed.

(2) FIGS. 2A and 2B are side views of beds of different sizes with the air system.

(3) FIG. 3 is a perspective view of a layer assembly and a hose assembly of the air system.

(4) FIG. 4 is a top view of the layer assembly of the air system.

(5) FIG. 5 is a top view of an alternative embodiment of the layer assembly having an alternative stitching pattern.

(6) FIG. 6 is an enlarged view of the layer assembly, opened to show a spacer layer in the layer assembly.

(7) FIG. 7 is a bottom view of the layer assembly.

(8) FIG. 8 is a top view of the layer assembly with portions removed to show components therein.

(9) FIG. 9 is a sectional view of the layer assembly taken along line 9-9 of FIG. 7.

(10) FIG. 10 is a perspective view of a portion of the layer assembly.

(11) FIG. 11A is a perspective view of the hose assembly.

(12) FIG. 11B is a sectional view of the hose assembly.

(13) FIGS. 12A-12C are views of a portion of the hose assembly.

(14) FIGS. 13A and 13B are top and bottom views of a portion of the hose assembly.

(15) FIG. 14 is an enlarged sectional view from FIG. 11B of connection components at the bottom of the hose assembly.

(16) FIG. 15A is a perspective view of an engine connector.

(17) FIG. 15B is an end view of the engine connector.

(18) FIG. 15C is a sectional view of the engine connector taken along line 15C-15C of FIG. 15B.

(19) FIG. 16A is an end view of a swivel fitting.

(20) FIG. 16B is a sectional view of the swivel fitting taken along line 16B-16B of FIG. 16A.

(21) FIGS. 17A-17C are side, top, and bottom views, respectively, of the distribution manifold.

(22) FIG. 18 is a perspective view of an alternative embodiment of an air system.

(23) Like reference symbols in the various drawings indicate like elements.

DETAILED DESCRIPTION

(24) In various embodiments described below, an air system can be used with a bed for delivering cooling, heating, or ambient air to control the temperature of a user lying on the air system. The air system can include one or more features that help increase air flow through the air system, thus improving user comfort while potentially using less energy. For example, a distribution manifold can have a fanned shape and/or be positioned under a spacer layer to increase air flow to certain parts of the air layer. An additional spacer material can be positioned under the spacer layer to help direct air from the distribution manifold across a user's body to the opposite side of the air layer. The air layer can have stitching that creates distribution channels oriented to allow flow to various parts of the air layer, and consequently, various parts of the user. An air engine can be connected via a hose assembly having structure to avoid air restrictions, such as a D-shaped cross-section that provides increased strength and/or a hose connection to reduce kinking. The air layer can be sized to cover only half of a two person bed, which can allow for increased comfort for the user by not requiring the air system to blow air to the entire bed. Having an air layer sized to cover only half of the bed also allows for two separate air layers to be positioned on the same bed, which can allow two users to control temperature to their own unique preferences. The air system can include flaps with retention features to hold the air layer in place, which can be suitable for retaining the air layer on a mattress even when only one air layer is positioned on a two person bed. Additional connectors, such as buttons and loops, can be employed to connect two air layers side-by-side. Some or all of these features can be combined for an air system having improved air flow and/or other functionality as further described in some of the following examples.

(25) FIG. 1 is a perspective view one example of an example bed 10 and an air system 12 used in conjunction with the bed 10. The air system 12 shown in the example of FIG. 1 can include a layer assembly 14, an engine 16, and a hose assembly 18 connecting the layer assembly 14 to the engine 16. The air system 12 can be used in conjunction with the bed 10 to provide warm, cool, and/or ambient air to a user resting on the air system 12 and the bed 10.

(26) In the illustrated embodiment, the bed 10 includes a mattress 20 and a foundation 22. In some embodiments, the mattress 20 can be an air mattress having an inflatable air chamber and a controller for controlling inflation of the inflatable air chamber. In other embodiments, the mattress 20 need not include an air chamber. For example, in some embodiments the mattress 20 can include foam and/or springs instead of or in addition to an inflatable air chamber. In those embodiments in which the mattress 20 is an air mattress, the air system 12 can be independent from the mattress 20, with the engine 16 dedicated to the air system 12 and the mattress 20 having its own inflation controller.

(27) The foundation 22 is positioned under the mattress 20 to support the mattress 20. In some embodiments, the foundation 22 can be an adjustable foundation with one or more articulable sections, such as for raising the head and foot of the foundation 22 and the mattress 20. In other embodiments, the foundation 22 can be a stationary foundation.

(28) In the illustrated embodiment, the layer assembly 14 of the air system 12 is positioned on a top surface of the mattress 20 so that when a user lies on the bed 10, the layer assembly 14 is positioned between the user and the mattress 20. The engine 16 delivers air from the engine 16 through the hose assembly 18 to the layer assembly 14 which distributes that air up through the top of the layer assembly 14 to the user laying on the layer assembly 14.

(29) In some embodiments, the engine 16 can be a blower or air pump for blowing ambient air through the hose assembly 18 and layer assembly 14. Such ambient air can be used to cool the user lying on the layer assembly 14 due to ambient air being typically lower than the body temperature of the user and due to evaporation of perspiration by the user.

(30) In some embodiments, the engine 16 can include a cooling unit to cool the air before delivering the air through the hose assembly 18 and the layer assembly 14. In such embodiments, the cooler air can further cool a user lying on the layer assembly.

(31) In some embodiments, the engine 16 can include a heating unit to heat the air before delivering the air through the hose assembly 18 and the layer assembly 14. In such embodiments, the engine 16 can warm users that feel too cool. In various embodiments, the engine 16 can be configured to provide warm, cool, and/or ambient air as desired by the user.

(32) The air system 12 can include a connector such as flaps 24 to connect the layer assembly 14 to the bed 10. The air system 12 can have a first flap 24 extending from a foot end of the layer assembly 14 to be tucked under the foot of the mattress 20, between the mattress 20 and the foundation 22. The air system 12 can also have a second flap 24 (not shown in FIG. 1) extending from a head end of the layer assembly 14 to be tucked under the head of the mattress 20, between the mattress 20 and the foundation 22. The flaps 24 can have one or more retention features, such as hook-and-loop style fasteners commonly sold under the brand name VELCRO.

(33) In the embodiment illustrated in FIG. 1, the air system 12 can be positioned under a fitted sheet 26 or other mattress cover that covers the mattress 20, the flaps 24, and at least part of the hose assembly 18. The hose assembly 18 can be sized and shaped to be relatively wide and flat so as to fit in a relatively narrow gap between the fitted sheet 26 and the mattress 20.

(34) FIGS. 2A and 2B are side views of beds 10 and 10B of different sizes with the air system 12. FIG. 2A shows the air system 12 on the bed 10 which is a relatively high-profile bed. The hose assembly 18 can stretch as shown to accommodate the height of the bed 10. FIG. 2B shows the air system 12 on the bed 10B which is a relatively low-profile bed. The hose assembly 18 can contract as shown such that the air system 12 works suitably with beds having high, low, and medium profiles. In other embodiments, the hose assembly 18 can be a retractable hose assembly.

(35) FIG. 3 is a perspective view of the layer assembly 14 and the hose assembly 18 of the air system 12. FIG. 4 is a top view of the layer assembly 14 of the air system 12. FIGS. 3 and 4 show the layer assembly having stitching 28 extending through the layer assembly 14 to define flow paths though the layer assembly 14 between the stitching 28. The stitching 28 can help direct air flowing through the layer assembly 14 to different parts of the layer assembly, including parts near a proximal side 30, an distal side 32, an end 34, and an end 36.

(36) FIGS. 3 and 4 show one embodiment of a pattern of stitching 28 having stitchings 28A-28J. The layer assembly 14 can include three relatively long stitchings 28A-28C extending from near a middle of the layer assembly 14 to near the end 34. The stitchings 28A-28C can curve as illustrated to direct air toward the end 34 and the distal side 32. The layer assembly 14 can include three relatively long stitchings 28D-28F extending from near a middle of the layer assembly 14 to near the end 36. The stitchings 28D-28F can curve as illustrated to direct air toward the end 36 and the proximal side 30.

(37) The layer assembly 14 can include two relatively short stitchings 28G-28H extending from near the stitching 28C to near the end 34. The stitchings 28G-28H can curve as illustrated to direct air toward the end 34 and the proximal side 30. The layer assembly 14 can include two relatively short stitchings 28I-28J extending from near the stitching 28F to near the end 36. The stitchings 28I-28J can curve as illustrated to direct air toward the end 36 and the distal side 32.

(38) The stitchings 28A-28C and 28G-28H can be spaced from the stitchings 28D-28F and 28I-28J to form a channel extending from the hose assembly 18 at the proximal side 30 to the distal side 32. Accordingly, the stitching 28 can be one suitable pattern that partially allows and partially restricts flow so as to supply air to various parts of the layer assembly 14.

(39) FIG. 5 is a top view of a layer assembly 38, which is an alternative embodiment of the layer assembly 14. The layer assembly 38 has an alternative pattern of stitching 40. The stitching 40 can fan out from a center of the layer assembly 38 with curved lines substantially illustrated. The stitching 40 can be substantially symmetrical about a centerline of the layer assembly 38. The stitching 40 can have lines that meet at a center of the layer assembly 38 so as to restrict flow from a proximal side 42 to a distal side 44. The layer assembly 38 can include holes 46 in a top layer 48 of the layer assembly 38 to allow air flow from the layer assembly 38 out. In the embodiment illustrated in FIG. 5, the holes are positioned in a pattern with more holes 46 near the distal side 44 and the ends of the layer assembly 38 and fewer or no holes 46 in an area near the proximal side 42 at the middle of the layer assembly 38.

(40) FIG. 6 is an enlarged view of the layer assembly 14, opened to show a spacer layer 50 in the layer assembly 14 enclosed by a cover 52. The cover 52 includes a top layer 54 and a bottom layer 56 that combine to cover and enclose the spacer layer 50. The spacer layer 50 includes a top mesh 58, a bottom mesh 60, and monofilament strands 62 extending between the top mesh 58 and the bottom mesh 60. In some embodiments, the strands 62 can be randomly or substantially randomly placed to provide structural support to hold the top mesh 58 spaced from the bottom mesh 60 and to provide flow paths between the strands 62. In other embodiments, the strands 62 can be positioned in a pattern, such as rows. The top and bottom meshes 58 and 60

(41) The stitching 28 of the layer assembly 14 can extend through both the cover 52 and the spacer layer 50, including the top layer 54, the top mesh 58, the monofilament strands 62, the bottom mesh 60, and the bottom layer 56. The stitching 28 can compress the spacer layer 50 to restrict air flow at the location of the stitching 28, while the spacer layer 50 can remain expanded at locations without the stitching 28 to allow air flow in channels between rows of the stitching 28.

(42) In some embodiments, the cover 52 can be made of a relatively air tight material and can define a pattern of holes such that air flowing through the cover 52 is directed to and through locations having the holes. In other embodiments, the cover 52 can be air-permeable or semi-air-permeable. For example, in some embodiments the cover 52 can include a substantially air tight bottom layer 56 to restrict air from flowing down toward the mattress 20 and can include a substantially air permeable top layer 53 to allow air flow up toward a user.

(43) FIG. 7 is a bottom view of the layer assembly 14. FIG. 7 illustrates one embodiment of the flaps 24 extending from the ends 34 and 36 of the layer assembly 14. The flaps 24 can have strips of retention material 64, such as hook-and-loop style fasteners commonly sold under the brand name VELCRO. The retention material 64 can be positioned on a bottom side of the flaps 24 such that when the flaps 24 are wrapped around the mattress 20 (see FIG. 1), the retention material 64 can engage the fabric on the bottom side of the mattress 20 to help retain the layer assembly 14 in place on the mattress 20.

(44) In some embodiments, the air system 12 and its layer assembly 14 can be used alone on one side of the mattress 20 with the other side of the mattress 20 having no layer assembly 14. FIG. 1 is one example of such an arrangement, which can be beneficial when two users sleep on the bed 10 but only one of the two users desire heating and/or cooling. In such arrangements, the second user can sleep directly on the mattress 20 (or on one or more sheets covering the mattress 20).

(45) In other embodiments, two air systems 12 with two layer assemblies 14 can be used on the same bed 10. In that case, two layer assemblies can be positioned side-by-side with one dedicated for each user, which can allow each user to independently control the heating and/or cooling of his or her side of the bed 10 via the respective air systems 12.

(46) As shown in FIG. 7, the air system 12 can include connectors 66 positioned at the distal side 32 of the layer assembly 14. The connectors 66 can connect one layer assembly 14 to a second layer assembly 14 when the two layer assemblies are positioned adjacent one-another on the mattress 20. By positioning the connectors 66 at the distal side 32 of each layer assembly 14, the hose assemblies 18 of the air systems 12 can hang off the sides of the mattress 20 when the distal sides 32 are positioned adjacent one-another and connected via the connectors 66.

(47) In some embodiments, the connectors 66 can include buttons 68 and loops 70. Each air system 12 can include multiple locations, each with a button 68 and a loop 70. At each given location, the loop 70 of one air system 12 can connect to the button 68 of the adjacent air system 12 and the button 68 of the first air system 12 can connect to the loop 70 of the adjacent air system 12. Accordingly, there can be two loop-to-button connections at each location and there can be multiple connection locations total (there are three shown in FIG. 7).

(48) In other embodiments, the connectors 66 can be different than as illustrated. For example, the connectors 66 can include some fastener other than buttons.

(49) In embodiments having the connectors 66, the connectors 66 can help retain the layer assembly 14 in place in applications when the layer assembly 14 is used with a second layer assembly 14. In other embodiments, the layer assembly 14 can be retained in place with the flaps 24 or via features other than the connectors 66.

(50) FIG. 8 is a top view of the layer assembly 14 with the top layer 54 of the cover 52 and the spacer layer 50 removed to show components therein. FIG. 8 shows the layer assembly 14 including the spacer layer 50, a spacer material 72, and a distribution manifold 74. The spacer material 72 and the distribution manifold 74 can be positioned within the layer assembly 14 under the spacer layer 50 so as to direct at least some of the air flow under the spacer layer 50 and across to the other side of a user's body lying on the layer assembly.

(51) The spacer material 72 can be similar to the spacer layer 50. In some embodiments, the spacer material 72 can differ from the spacer layer 50 in certain ways. For example, the spacer material 72 can have monofilament strands 62 (shown in FIG. 6) that are thicker than those of the spacer layer 50, making the spacer material 72 relatively stiffer. The spacer material 72 can have its strands 62 positioned in rows so as to direct more airflow in a specific direction than embodiments of the spacer layer 50 having strands 62 positioned randomly. The spacer material 72 can be positioned only in a central portion of the layer assembly 14, such as at a location near a user's hips, while the spacer layer 50 can extend through all or substantially all of the layer assembly 14.

(52) The distribution manifold 74 can be shaped as an arc or semi-circle with ribs 76 to direct air into the layer assembly 14 at different angles. The distribution manifold 74 can direct air toward the spacer material 72 as well as to the sides of the spacer material 72 under the spacer layer 50.

(53) In some embodiments, the distribution manifold 74 can be wider than the spacer material 72. In other embodiments, the distribution manifold 74 can be about the same width as the spacer material 72. For example, the distribution manifold can be about 12 inches wide and the spacer material can be about 8 to 12 inches wide.

(54) In some embodiments, the distribution manifold 74 and the ribs 76 can be made of a relatively soft and flexible material. For example, the distribution manifold 74 and the ribs 76 can be made of silicone. This can allow the distribution manifold 74 and the ribs 76 to be rigid enough to supply air to the layer assembly 14 but soft enough to produce little or no discomfort to a user laying on the layer assembly 14 at a location near or on the distribution manifold 74.

(55) FIG. 9 is a sectional view of the layer assembly 14 and the hose assembly 18 taken along line 9-9 of FIG. 7. FIG. 9 shows the spacer material 72 and the distribution manifold 74 being positioned inside the cover 52 of the layer assembly 14 below the spacer layer 50. Air from the hose assembly 18 can be directed into the layer assembly 14 via the distribution manifold 74. The distribution manifold 74 can direct some air into the spacer material 72, some air into the space between the spacer material 72 and the bottom layer 56 of the cover 52, and some air into the space between the spacer layer 50 and the bottom layer 56 of the cover 52. Air directed under the spacer material 72, through the spacer material 72 and under the spacer layer 50 (to the sides of the spacer material 72) can all ultimately be directed up through the spacer layer 50 and up through the top of the layer assembly 14 to cool or heat the user.

(56) In some embodiments, the spacer material 72 can be thinner than the spacer layer 50 and the distribution manifold 74. For example, in some embodiments the spacer material 72 can be about 10 mm thick and the spacer layer 50 can be about 20 mm thick. In other embodiments, the spacer layer 50 and the spacer material 72 can have different thicknesses suitable for the application.

(57) FIG. 10 is a perspective view of a portion of the layer assembly 14 with the distribution manifold 74 extending into the side of the layer assembly 14. As shown in FIGS. 8-10, the spacer layer 50, the distribution manifold 74, and the spacer material 72 can assist in directing air to portions of the user's body that benefit from cooling or heating. The distribution manifold 74 and the spacer material 72 can be positioned, oriented, and configured to direct at least some air toward further extremities of the layer assembly 14, which can reduce the tendency for the bulk of the air coming from the hose assembly 18 to exit the layer assembly 14 at a location proximate the connection point of the hose assembly 18 to the layer assembly 14.

(58) FIG. 11A is a perspective view of the hose assembly 18. FIG. 11B is a sectional view of the hose assembly 18. In some embodiments, the hose assembly 18 can include the distribution manifold 74, a hose 78, a connector 80 between the distribution manifold 74 and the hose 78, a swivel fitting 82, and an engine connector 84.

(59) The distribution manifold 74 can include indented flex points 86 that allow for at least some flexibility of the distribution manifold 74. The hose 78 can also include indented flex points 88. For example, the hose 78 can be a bellows-style hose with a repeating series of alternating flex points 88 along the hose 78. This can allow the hose assembly 18 to expand and contract as well as to bend to accommodate the air system 12 being used in different applications.

(60) The hose 78 connects to the engine 16 (shown in FIG. 1) via the engine connector 84 and the swivel fitting 82. The engine connector 84 can have a tapered nozzle 90 that extends into the hose 78 and is spaced from an inner surface of the hose 78 so that the tapered nozzle 90 does not touch the inner surface of the hose 78 during normal operation. Thus, the hose 78 can be moved with respect to the engine connector 84 without necessarily putting the most stress at the nozzle 90. Even if the hose 78 is pulled far enough that the nozzle 90 does contact the inner surface of the hose 78 and add some stress at that point, the total stress at that point can be reduced as compared to other possible designs.

(61) FIGS. 12A-12C are views of the hose 78 taken from three different sides.

(62) FIG. 13A is a top view of the hose 78 taken along line 13A-13A of FIG. 12A. As shown in FIG. 13A, the hose 78 can have a substantially D-shaped cross section, with a substantially straight portion 92 opposite a curved portion 94. The straight portion 92 of the hose 78 can allow the hose 78 to lay relatively flat against the bed 10. The curved portion 94 of the hose 78 can increase structural strength of the hose and decrease the chance of the hose 78 kinking and/or collapsing when bent or squished. For example, the D-shaped cross section can suitably resist collapsing of the hose 78 when used with tight-fitting sheets covering a portion of the hose 78. Such a D-shaped cross section can be particularly beneficial in applications where the hose 78 is made of a relatively soft material, such as silicone.

(63) FIG. 14 is an enlarged sectional view from FIG. 11B of connection components at the bottom of the hose assembly 18. As shown in FIG. 14, the hose 78 can be connected to the engine connector 84 via the swivel fitting 82. The hose 78 can have an annular ring 96 extending radially outward. The swivel fitting 82 can have an annular ring 98 extending radially inward. The end of the hose 78 can extend into the swivel fitting 82 such that the annular ring 96 of the hose 78 is retained against the engine connector 84.

(64) The nozzle 90 of the engine connector 84 extends from a relatively thick inner ring 100. The engine connect 84 also has a thinner outer ring 102 positioned radially outward of the inner ring 100 so as to define an annular slot 104 between the outer ring 102 (on the outside) and the inner ring 100 and the nozzle 90 (on the inside). The swivel fitting 82 and the end of the hose 78 can be positioned in the slot 104 as illustrated with the swivel fitting 82 holding the ring 96 adjacent the nozzle 90 and the ring 100.

(65) The radially outer surface of the swivel fitting 82 can engage with the radially inner surface of the ring 102 of the engine connector 84 via a snap fitting 106. The snap fitting 106 can be sized and toleranced to allow for rotational movement between the swivel fitting 82 and the engine connector 84. This can allow the hose 78 to swivel with respect to the engine 16. In some embodiments, the end of the hose 78, including its ring 96, can be sized to allow relative rotational movement between the hose and the swivel fitting 82 as well.

(66) FIG. 15A is a perspective view of the engine connector 84. FIG. 15B is an end view of the engine connector 84. FIG. 15C is a sectional view of the engine connector 84 taken along line 15C-15C of FIG. 15B. FIGS. 15A-15C show additional detail of the engine connector 84 described above.

(67) FIG. 16A is an end view of the swivel fitting 82. FIG. 16B is a sectional view of the swivel fitting 82 taken along line 16B-16B of FIG. 16A. FIGS. 16A-16B show additional detail of the swivel fitting 82 described above.

(68) FIGS. 17A-17C are side, top, and bottom views, respectively, of the distribution manifold 74. FIGS. 17A-17C show additional detail of the distribution manifold 74 described above.

(69) FIG. 18 is a perspective view of an alternative embodiment of an air system 108. The air system 108 includes the layer assembly 38 (also shown in FIG. 5), the engine 16 (also shown in FIG. 1), and a hose assembly 110 connecting the layer assembly 38 to the engine 16. In some embodiments, the air system 108 is like the air system 14 described above, with some similarities and differences.

(70) For example, the air system 108 can include an additional fabric cover 112 that covers the layer assembly 38. The top layer 48 of the layer assembly 38 can be relatively air tight except for holes 46 that allow air to flow therethrough. The fabric cover 112 can be relatively air permeable to allow air flow therethrough without additional holes.

(71) Additionally, the layer assembly 38 can have a spacer layer 114 that is aligned with an outlet of a distribution manifold 116 of the hose assembly 110 such that air from the distribution manifold 116 is blown directly into the side of the spacer layer 114. The spacer layer 114 can have a cut-out of a semi-circle or other suitable shape to correspond to the shape of the distribution manifold 116 and allow the distribution manifold 116 to extend into the layer assembly 38 at the same level as the spacer layer 114. The stitching 40 can be patterned in a manner suitable for directing air to different parts of the layer assembly 38 when air is blown directly into the side of the spacer layer 114 as shown and described.

(72) As shown in FIG. 18, the cover 112 is partially pulled-back toward the left side of FIG. 18 to expose the layer assembly 38 at the middle and right of FIG. 18. Additionally, a portion of the top layer 48 of the layer assembly 38 is lifted at the distribution manifold 116 to show the shape of the distribution manifold 116 including the curved outlet of the distribution manifold 116 and how it is aligned with the spacer layer 114 to blow air directly into the side of the spacer layer 114 in the example shown.

(73) Air systems as described herein provide a convenient, comfortable, and effective system to provide ambient or temperature controlled air to one or two users of a bed. Various embodiments can include unique features and advantages including relatively high air flow reliably delivered to appropriate locations for user comfort and effective connection mechanisms to securely and conveniently hold the system in place.

(74) The foregoing detailed description and some embodiments have been given for clarity of understanding only. No unnecessary limitations are to be understood therefrom. It will be apparent to those skilled in the art that many changes can be made in the embodiments described without departing from the scope of the invention. For example, while the air system is described as delivering cooling or heating air in some embodiments, the air system can deliver ambient air in other embodiments. Additionally, while the shape and configuration of certain components can be beneficial for increasing air flow in certain embodiments, shape and configuration can be varied for those components in other embodiments. Thus, the scope of the present invention should not be limited to the exact details and structures described herein, but rather by the structures described by the language of the claims, and the equivalents of those structures. Any feature or characteristic described with respect to any of the above embodiments can be incorporated individually or in combination with any other feature or characteristic, and are presented in the above order and combinations for clarity only.