Thermally-enhanced HVAC constructions

• US 7,678,434 B2
• Filed: 04/30/2004
• Issued: 03/16/2010
• Est. Priority Date: 04/30/2004
• Status: Expired due to Fees

• Current Assignee: York International Corporation (Johnson Controls International plc)
• Original Assignee: York International Corporation (Johnson Controls International plc)
• Inventors: Phillips, Patrick
• Primary Examiner(s): O'Hern; Brent T
• Application Number:
  US10/837,184
• Publication Number:
  US 20050244597A1
• Time in Patent Office: 2,146 Days
• Field of Search: 428/68, 428/34.1, 428/126, 428/210, 522/201, 522/72
• US Class Current: 428/34.1
• CPC Class Codes: F24F 11/33 to fire, excessive heat or smoke
• CPC Class Codes: F24F 13/20 Casings or covers
• CPC Class Codes: Y10T 428/13 Hollow or container type article [e.g., tube, vase, etc.]
• CPC Class Codes: Y10T 428/23 Sheet including cover or casing
• CPC Class Codes: Y10T 428/24926 including ceramic, glass, porcelain or quartz layer

Abstract

A thermally-enhanced, insulated component for use with an HVAC system includes a component having an outer surface usable with an HVAC system, the component being substantially filled with an insulating material. A thin, dimensionally stable layer of thermal barrier material having opposed surfaces is disposed inside the component at a predetermined distance from the outer surface of the component. The thermal barrier layer is in contact with the insulating material on at least one surface of the opposed surfaces. When the outer surface of the component is subjected to an elevated temperature, the thermal barrier layer maintains a sufficient temperature differential between the surface of the opposed surfaces of the thermal barrier layer facing opposite the outer surface and the surface of the opposed surfaces of the thermal barrier layer facing the outer surface so that the insulating material produces a reduced rate of smoke.

Claims

1. A thermally-enhanced component comprising:

a substantially enclosed and contiguous air handling unit structure having an interior surface and an exterior surface;

at least one sheet of a non-woven ceramic material having opposed surfaces being disposed inside the structure at a predetermined distance from the exterior surface of the structure, the at least one sheet being configured to provide a thermal barrier;

insulating material disposed inside the structure and in contact with at least one surface of the at least one sheet, the insulating material having a predetermined rate of smoke generation at a predetermined temperature sufficient to produce smoldering; and

wherein the at least one sheet being configured and disposed to provide a sufficient temperature differential between the opposed surfaces of the at least one sheet to reduce the predetermined rate of smoke generated by the insulating material upon the exterior surface of the structure being subjected to the predetermined temperature.

2. The thermally-enhanced component of claim 1 wherein the at least one sheet is flexible.

3. The thermally-enhanced component of claim 1 wherein the at least one sheet is positioned in contact with an inner surface of the component.

4. The thermally-enhanced component of claim 1 wherein the component is a raceway.

5. The thermally-enhanced component of claim 1 wherein the component is a panel.

6. The thermally-enhanced component of claim 5 wherein the panel has a reduced coincidence effect at its critical frequency.

7. The thermally-enhanced component of claim 6 wherein the critical frequency is about 1,000 Hz.

8. The thermally-enhanced component of claim 1 wherein the uncompressed thickness of the at least one sheet is about 0.017 inch.

9. The thermally-enhanced component of claim 1 wherein the uncompressed thickness of the at least one sheet is between 0.017 inch and about 0.020 inch.

10. The thermally-enhanced component of claim 1 wherein the at least one sheet of a non-woven ceramic material includes at least two sheets of a non-woven ceramic material, the at least two sheets of a non-woven ceramic material are disposed inside the structure at a predetermined distance from one another.

11. The thermally-enhanced component of claim 1 wherein the insulating material is a polyurethane foam.

12. The thermally-enhanced component of claim 11 wherein the polyurethane foam is injected into the component.

13. A thermally-enhanced component comprising:

a substantially enclosed and contiguous HVAC system structure having an interior surface and an exterior surface, the structure being substantially filled with an insulating material;

at least one sheet of a non-woven ceramic material having opposed surfaces being disposed inside the structure at a predetermined distance from the exterior surface of the structure, the at least one sheet being configured to provide a thermal barrier;

insulating material disposed inside the structure and in contact with at least one surface of the at least one sheet, the insulating material having a predetermined rate of smoke generation at a predetermined temperature sufficient to produce smoldering; and

wherein upon the exterior surface of the structure being subjected to the predetermined temperature, the at least one sheet providing a sufficient temperature differential between the opposed surfaces of the at least one sheet to reduce the predetermined rate of smoke generated by the insulating material.

14. The thermally-enhanced component of claim 13 wherein the at least one sheet is flexible.

15. The thermally-enhanced component of claim 13 wherein the component is a raceway.

16. The thermally-enhanced component of claim 13 wherein the component is a panel.

17. The thermally-enhanced component of claim 16 wherein the panel has a reduced coincidence effect at its critical frequency.

18. The thermally-enhanced component of claim 17 wherein the critical frequency is about 1,000 Hz.

19. The thermally-enhanced component of claim 13 wherein the component is a door.

20. The thermally-enhanced component of claim 13 wherein the component is any one of ducting, drains or drain pans for connecting other HVAC components.

21. The thermally-enhanced component of claim 13 wherein the component is a refrigerated display case.

22. The thermally-enhanced component of claim 13 wherein the component is a walk-in cooler.

23. The thermally-enhanced component of claim 13 wherein the component is a household appliance.