초록 ▼

An improved insulated glazing unit is provided which can attain about R5 to about R10 thermal performance at the center of the glass while having dimensions about the same as those of a conventional double glazed insulated glazing unit. An outer glazing and inner glazing are sealed to a spacer to fo

An improved insulated glazing unit is provided which can attain about R5 to about R10 thermal performance at the center of the glass while having dimensions about the same as those of a conventional double glazed insulated glazing unit. An outer glazing and inner glazing are sealed to a spacer to form a gas impermeable space. One or more rigid, non-structural glazings are attached to the inside of the spacer to divide the space between the inner and outer glazings to provide insulating gaps between glazings of from about 0.20 inches to about 0.40 inches. One or more glazing surfaces facing each thermal gap are coated with a low emissivity coating. Finally, the thermal gaps are filled with a low conductance gas such as krypton gas.

대표청구항 ▼

1. An insulated glazing unit for constructing thermal windows comprising: an outer glazing having an exterior surface and a center-facing surface, an inner glazing having an interior surface and a center-facing surface, said inner glazing being held parallel to and spaced away from said outer gl

1. An insulated glazing unit for constructing thermal windows comprising: an outer glazing having an exterior surface and a center-facing surface, an inner glazing having an interior surface and a center-facing surface, said inner glazing being held parallel to and spaced away from said outer glazing such that the center-facing surface of said outer glazing and the center-facing surface of said inner glazing face each other, a means for sealing said inner glazing and said outer glazing together to form a gas impermeable space between said inner glazing and said outer glazing; at least one middle glazing held substantially parallel to, between and spaced away from said center-facing surface of said outer glazing and said center-facing surface of said inner glazing to form at least two thermal gaps; a low emittance coating having an emissivity of less than about 0.15 on at least one glazing surface facing each said thermal gap; and, a low conductance gas comprising krypton entrapped within said gas impermeable space. 2. The insulated glazing unit of claim 1 having one said middle glazing. 3. The insulated glazing unit of claim 2 in which said low emittance coatings are placed on said center-facing surface of said outer glazing and said center-facing surface of said inner glazing, or on both surfaces of said middle glazing, or on said center-facing surface of said outer glazing and the surface of said middle glazing facing said inner glazing, or on said center-facing surface of said inner glazing and the surface of said middle glazing facing said outer glazing. 4. The insulated glazing unit of claim 3 in which said low emittance coating has an emissivity of less than about 0.10. 5. The insulated glazing unit of claim 1 in which each said middle glazing is spaced away from any other glazing to form thermal gaps of from about 0.20 inch to about 0.40 inch. 6. The insulated glazing unit of claim 1 in which said low conductance gas comprises at least about 50% krypton by volume. 7. The insulated glazing unit of claim 1 in which said glazings are formed from glass. 8. The insulated glazing unit of claim 1 additionally comprising a means for placing said low conductance gas into said gas impermeable space. 9. An about R5 to about R10 rated triple-glazed insulated glazing unit for use in constructing thermal windows comprising: a spacing means constructed to be gas impermeable and having a first side adapted to receive an outer glazing, a second side parallel to and spaced away from said first side adapted to receive an inner glazing, and an interior adapted to receive a middle glazing; an outer glazing having an exterior surface and a center-facing surface, said outer glazing being sealed to said first side of said spacing means such that said center-facing surface of said outer glazing faces said second side of said spacing means and such that said outer glazing when sealed to said spacing means forms a gas impermeable barrier; an inner glazing having an interior surface and a center-facing surface, said inner glazing being sealed to said second side of said spacing means such that said center-facing surface of said inner glazing faces said center-facing surface of said outer glazing and such that said inner glazing when sealed to said spacing means containing said outer glazing forms a gas impermeable space; a middle glazing attached to said spacing means and held between said center-facing surface of said outer glazing and said center-facing surface of said inner glazing to form two thermal gaps of from about 0.20 inch to about 0.40 inch in size; a low emittance coating, having an emissivity of less than about 0.10, on at least one glazing surface facing each said thermal gap; and, a low conductance gas comprising krypton entrapped within said gas impermeable space formed by said outer glazing, said inner glazing, and said spacing means. 10. The insulated glazing unit of claim 9 additionally comprising a means for placing said low conductance gas into said gas impermeable space. 11. The insulated glazing unit of claim 9 in which said inner and outer glazings are constructed from glass having a thickness of from about 0.090 inch to about 0.250 inch. 12. The insulated glazing unit of claim 9 in which said middle glazing is constructed from glass having a thickness of no more than about 0.125 inch. 13. The insulated glazing unit of claim 9 in which said low emittance coatings are placed on said center-facing surface of said outer glazing and said center-facing surface of said inner glazing, or on both surfaces of said middle glazing, or on said center-facing surface of said outer glazing and the surface of said middle glazing facing said inner glazing, or on said center-facing surface of said inner glazing and the surface of said middle glazing facing said outer glazing. 14. A thermally insulated window assembly comprising: (a) at least one multiple glazing assembly, each said multiple glazing assembly comprising an outer glazing having an exterior surface and a center-facing surface, an inner glazing having an interior surface and a center-facing surface, said inner glazing being held parallel to and spaced away from said outer glazing such that the center-facing surface of said outer glazing and the center-facing surface of said inner glazing face each other, at least one middle glazing held parallel to, between and spaced away from said center-facing surface of said outer glazing and said center-facing surface of said inner glazing to form at least two thermal gaps and, low emittance coatings having an emissivity of less than about 0.15 on one or more of said glazing surfaces; (b) a window frame adapted to receive at least one said multiple glazing assembly, said window frame constructed to form a gas impermeable space between said outer glazing, said inner glazing, and said window frame when said multiple glazing assembly is sealed in said window frame; and, (c) a low conductance gas comprising krypton entrapped within said gas impermeable space. 15. The window assembly of claim 14 in which each said middle glazing is spaced away from any other glazing to form thermal gaps of from about 0.20 inch to about 0.40 inch. 16. The window assembly of claim 14 in which said low emittance coating is placed on at least one glazing surface facing each said thermal gap. 17. The window assembly of claim 14 having one said middle glazing. 18. The window assembly of claim 17 in which said low emittance coating is placed on said center-facing surface of said outer glazing and said center-facing surface of said inner glazing, or on both surfaces of said middle glazing, or on said center-facing surface of said outer glazing and the surface of said middle glazing facing said inner glazing, or on said center-facing surface of said inner glazing and the surface of said middle glazing facing said outer glazing. 19. The window assembly of claim 14 in which said low conductance gas comprises at least about 50% krypton by volume. 20. The window assembly of claim 14 additionally comprising a means for placing said low conductance gas into said gas impermeable space. 21. In an insulated window glazing structure of the type utilizing outer and inner window glazings and a sealed housing, the improvement comprising, a postionally tolerant transparent baffle sized to fit entirely within the housing inner walls, interposed between inner and outer glazings to define and further to restrict convective current communication between the resulting chambers, the baffle being otherwise substantially free of predetermined cooperation and orientation with respect to the glazings.