1. A furnace for supplying heated air to a space to be heated and capable of being installed in more than one position, the furnace including at least one burner and a heat exchanger in communication with the at least one burner for receiving products of combustion therefrom, the furnace further including an inducer in communication with the heat exchanger for inducing a flow of products of combustion through the heat exchanger and out of the furnace, the furnace comprising:
a multi-position condensate draining system, the condensate draining system including a manifold disposed between the heat exchanger and the inducer, the manifold including at least three drain ports positioned to drain fluid, at least one of the drain ports being capable of draining fluid from the manifold when the furnace is positioned for downflow operation, upflow operation, left horizontal flow operation, or right horizontal flow operation.
2. The furnace of claim 1, wherein the condensate draining system further includes a trap in communication with the manifold and an ambient environment, the trap including an inlet connected to the manifold at one of the drain ports for receiving fluid from the manifold, the trap being configured to inhibit non-liquid products from passing through the trap and into the ambient environment.
3. The furnace of claim 1, wherein the manifold includes a first portion and a second portion cooperating with the first portion to define first and second chambers, the first portion including the drain ports, each of the drain ports being positioned to facilitate fluid flow out of the second chamber.
4. The furnace of claim 3, wherein the second manifold portion includes at least two drain holes for draining fluid from the first chamber into the second chamber when the furnace is in an off-cycle, at least one of the drain holes being capable of draining fluid from the first chamber when the furnace is positioned for downflow operation, upflow operation, left horizontal flow operation, or right horizontal flow operation.
5. The furnace of claim 3, wherein the first manifold portion includes a plurality of side members, and the second manifold portion is disposed at a predetermined distance from each side member to inhibit fluid transfer from the second chamber to the first chamber.
6. The furnace of claim 3, wherein the manifold further includes two pairs of bosses disposed in the first portion, a first boss in each pair facilitating communication with the first chamber, and a second boss in each pair facilitating communication with the second chamber.
7. The furnace of claim 6, wherein the first manifold portion includes an aperture therethrough, configured to facilitate communication between the inducer and the first chamber, the second manifold portion includes an orifice therethrough, and the condensate draining system further includes first and second pressure sensors, the first pressure sensor being connected to one of the boss pairs, and the second pressure sensor being connected to the other boss pair, the boss pairs being configured such that at least one of the pressure sensors is capable of sensing a differential fluid pressure across the orifice when the furnace is positioned for downflow operation, upflow operation, left horizontal flow operation, or right horizontal flow operation.
8. The furnace of claim 7, wherein the pressure sensors are configured to disable the furnace in response to the differential pressure being less than a predetermined pressure.
9. A furnace for supplying heated air to a space to be heated and capable of being installed in more than one position, the furnace including at least one burner and a heat exchanger in communication with the at least one burner for receiving products of combustion therefrom, the furnace further including an inducer in communication with the heat exchanger for inducing a flow of products of combustion through the heat exchanger and out of the furnace, the furnace comprising:
a multi-position condensate draining system, the condensate draining system including an exhaust manifold in communication with the inducer and an ambient environment, and configured to facilitate transfer of combustion gases out of the furnace, the exhaust manifold including at least three drain ports positioned to drain fluid from the exhaust manifold, at least one of the drain ports being capable of draining fluid when the furnace is positioned for downflow operation, upflow operation, left horizontal flow operation, or right horizontal flow operation.
10. The furnace of claim 9, wherein the condensate draining system further includes a trap in communication with the exhaust manifold and an ambient environment, the trap including an inlet connected to the exhaust manifold at one of the drain ports for receiving fluid from the exhaust manifold, the trap being configured to inhibit non-liquid products from passing through the trap and into the ambient environment.
11. The furnace of claim 9, wherein the exhaust manifold includes an inlet and two outlets, the exhaust manifold inlet being connected to the inducer, and at least one of the exhaust manifold outlets being in communication with an ambient environment.
12. The furnace of claim 11, wherein the exhaust manifold further includes a tee and two pipe sections attached to the tee, the tee including the exhaust manifold inlet, and each of the pipes including one of the exhaust manifold outlets and at least one of the drain ports.
13. A furnace for supplying heated air to a space to be heated and capable of being installed in more than one position, the furnace including a cabinet generally defining a furnace interior, at least one burner, and a heat exchanger in communication with the at least one burner for receiving products of combustion therefrom, the furnace further including an inducer in communication with the heat exchanger for inducing a flow of products of combustion through the heat exchanger and out of the furnace, and a plurality of manifolds, each of the manifolds being configured to receive products of combustion and to facilitate transfer of combustion products out of the manifold, the furnace comprising:
a multi-position condensate draining system, the condensate draining system including at least three connectors attached to the cabinet, each of the connectors including at least one inlet cooperating with a corresponding cabinet wall to facilitate fluid flow through the corresponding cabinet wall, the connectors being positioned on the cabinet such that at least one of the connectors is capable of receiving fluid through a corresponding connector inlet when the furnace is positioned for downflow operation, upflow operation, left horizontal flow operation, or right horizontal flow operation, and the condensate draining system further including a trap having at least one inlet cooperating with one of the connectors to receive fluid from a corresponding connector inlet, the trap being in communication with an ambient environment and configured to inhibit non-liquid products from passing through the trap and into the ambient environment.
14. The furnace of claim 13, wherein the trap includes two inlets, each inlet being in communication with a different manifold.
15. The furnace of claim 13, wherein the trap includes at least one outlet configured to facilitate fluid flow out of the trap.
16. The furnace of claim 13, wherein one of the manifolds is disposed between the heat exchanger and the inducer and includes at least one drain port in communication with one of the at least one trap inlets.
17. The furnace of claim 16, wherein the manifold includes a first portion and a second portion cooperating with the first portion to define first and second chambers, the first portion including the at least one drain port, the at least one drain port being configured to facilitate fluid flow out of the second chamber.
18. The furnace of claim 13, wherein the manifolds include an exhaust manifold in communication with the inducer and an ambient environment, the exhaust manifold including at least one drain port in communication with one of the at least one trap inlets.
19. The furnace of claim 18, wherein the exhaust manifold includes an inlet connected to the inducer, and two outlets, at least one of the exhaust manifold outlets being in communication with an ambient environment.
20. The furnace of claim 19, wherein the exhaust manifold further includes a tee and two pipes attached to the tee, the tee including the exhaust manifold inlet, and each of the pipes including one of the exhaust manifold outlets and at least one of the at least one drain ports.
21. A furnace for supplying heated air to a space to be heated and capable of being installed in more than one position, the furnace including an air intake for receiving air from an ambient environment, at least one burner, and a heat exchanger in communication with the at least one burner for receiving products of combustion therefrom, the furnace further including an inducer in communication with the heat exchanger for inducing a flow of products of combustion through the heat exchanger and out of the furnace, the furnace comprising:
an air intake manifold disposed between the furnace air intake and the at least one burner and configured to facilitate air flow therebetween, the air intake manifold including an outlet and at least one inlet, the at least one inlet communicating with the furnace air intake, and the outlet communicating with the at least one burner, the at least one inlet including a first portion with a first cross section having a linear dimension and defining a first area, and a second portion with a quadrilateral cross section having a depth and a height and defining a second area, the depth of the quadrilateral cross section being smaller than the linear dimension of the first cross section.
22. The furnace of claim 21, wherein the second area is greater than or equal to the first area.
23. The furnace of claim 21, wherein the first cross section is generally circular and the quadrilateral cross section is generally rectangular.
24. The furnace of claim 21, wherein the at least one air intake manifold inlet further includes a transition portion disposed between the first and second portions for inhibiting air flow resistence.
25. The furnace of claim 21, wherein the air intake manifold further comprises a channel having at least three sides and two open ends, the channel including a pair of flanges disposed along a length of the channel.
26. The furnace of claim 25, wherein the air intake manifold channel includes a flange configured to facilitate attachment of the air intake manifold to the furnace.
27. The furnace of claim 25, wherein the at least one inlet includes at least one protrusion configured to mate with a corresponding aperture in the channel.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1-28. (canceled)
29. A magnetic random access memory cell, said memory cell comprising:
a first magnetic layer adjacent a conductive layer, said first magnetic layer comprising a first plurality of films;
a nonmagnetic tunnel barrier layer separated from said conductive layer by said first magnetic layer; and
a second magnetic layer separated from said first magnetic layer by said nonmagnetic tunnel barrier layer, said second magnetic layer comprising:
a second plurality of films including a ferromagnetic material adjacent said nonmagnetic tunnel barrier layer and a tantalum film adjacent said ferromagnetic material, and;
an oxide layer adjacent to said second magnetic layer.
30. The memory cell of claim 29, wherein said nonmagnetic tunnel barrier layer comprises aluminum oxide.
31. The memory cell of claim 30, wherein said aluminum oxide has a thickness of about 5 to 25 Angstroms.
32. The memory cell of claim 29, wherein said nonmagnetic tunnel barrier layer comprises a material selected from the group consisting of copper, titanium oxide, magnesium oxide, silicon oxide and aluminum nitride.
33. The memory cell of claim 29, wherein said first magnetic layer comprises a first tantalum layer, a first nickel-iron layer, a manganese-iron layer, and a second nickel-iron layer.
34. A processor system comprising at least one memory circuit, wherein said at least one memory circuit comprises at least one memory cell, said at least one memory cell comprising:
a first magnetic layer adjacent a conductive layer, said first magnetic layer comprising a first plurality of films;
a nonmagnetic tunnel barrier layer separated from said conductive layer by said first magnetic layer; and
a second magnetic layer separated from said first magnetic layer by said nonmagnetic tunnel barrier layer, said second magnetic layer comprising:
a second plurality of films including a ferromagnetic material adjacent said nonmagnetic tunnel barrier layer and a tantalum film adjacent said ferromagnetic material, and;
an oxide layer adjacent to said second magnetic layer.
35. A memory circuit, said memory circuit comprising:
a plurality of memory cells, each memory cell comprising:
a first magnetic layer adjacent a conductive layer, said first magnetic layer comprising a first plurality of films;
a nonmagnetic tunnel barrier layer separated from said conductive layer by said first magnetic layer; and
a second magnetic layer separated from said first magnetic layer by said nonmagnetic tunnel barrier layer, said second magnetic layer comprising:
a second plurality of films including a ferromagnetic material adjacent said nonmagnetic tunnel barrier layer and a tantalum film adjacent said ferromagnetic material, and;
an oxide layer adjacent to said second magnetic layer.
36. A magnetic random access memory cell, said memory cell comprising:
a first magnetic layer adjacent a conductive layer, said first magnetic layer comprising a first plurality of films;
a nonmagnetic tunnel barrier layer separated from said conductive layer by said first magnetic layer; and
a second magnetic layer separated from said first magnetic layer by said nonmagnetic tunnel barrier layer, said second magnetic layer comprising:
a second plurality of films including a ferromagnetic material adjacent said nonmagnetic tunnel barrier layer and a tantalum film adjacent said ferromagnetic material; and
a nitride layer adjacent to said second magnetic layer.
37. The memory cell of claim 36, wherein said first magnetic layer is a pinned layer.
38. The memory cell of claim 36, wherein said nonmagnetic tunnel barrier layer comprises aluminum oxide.
39. The memory cell of claim 37, wherein said aluminum oxide has a thickness of about 5 to 25 Angstroms.
40. The memory cell of claim 36, wherein said nonmagnetic tunnel barrier layer comprises a material selected from the group consisting of copper, titanium oxide, magnesium oxide, silicon oxide and aluminum nitride.
41. The memory cell of claim 36, wherein said first magnetic layer comprises a first tantalum layer, a first nickel-iron layer, a manganese-iron layer, and a second nickel-iron layer.
42. The memory cell of claim 40, wherein said plurality of films comprises a third nickel-iron layer, a second tantalum layer, and a tungsten nitrogen chemical mechanical polishing stop.
43. A processor system comprising at least one memory circuit, wherein said at least one memory circuit comprises at least one memory cell, said at least one memory cell comprising:
a first magnetic layer adjacent a conductive layer, said first magnetic layer comprising a first plurality of films;
a nonmagnetic tunnel barrier layer separated from said conductive layer by said first magnetic layer; and
a second magnetic layer separated from said first magnetic layer by said nonmagnetic tunnel barrier layer, said second magnetic layer comprising:
a second plurality of films including a ferromagnetic material adjacent said nonmagnetic tunnel barrier layer and a tantalum film adjacent said ferromagnetic material; and
a nitride layer adjacent to said second magnetic layer.
44. A memory circuit, said memory circuit comprising:
a plurality of memory cells, each memory cell comprising:
a first magnetic layer adjacent a conductive layer, said first magnetic layer comprising a first plurality of films;
a nonmagnetic tunnel barrier layer separated from said conductive layer by said first magnetic layer; and
a second magnetic layer separated from said first magnetic layer by said nonmagnetic tunnel barrier layer, said second magnetic layer comprising:
a second plurality of films including a ferromagnetic material adjacent said nonmagnetic tunnel barrier layer and a tantalum film adjacent said ferromagnetic material, and;
a nitride layer adjacent to said second magnetic layer.