US 2026/0251006 A1 · VACUUM INSULATED PANEL WITH IMPROVED THERMAL PERFORMANCE PROXIMATE EDGE OF GLASS DURING ASYMMETRIC THERMAL CONDITIONS

Abstract

A vacuum insulating panel may include: a first substrate; a second substrate; a plurality of spacers provided in a gap between at least the first and second substrates, wherein the gap is at pressure less than atmospheric pressure; and a seal (e.g., edge seal) provided at least partially between at least the first and second glass substrates. Components such as edge seal material(s) and/or dimension(s) thereof are configured in a vacuum insulating panel to improve thermal performance to provide for higher glass temperatures on the warm side of the panel during asymmetric thermal conditions, proximate the edge seal and/or at other locations, so as to improve thermal performance.

Claims43

Dependent claims

1-64. (canceled)

A vacuum insulating panel comprising:

a first glass substrate;
a second glass substrate;
at least one spacer provided in a gap between at least the first and second glass substrates, wherein the gap is at pressure less than atmospheric pressure;
a seal, comprising a first layer comprising tellurium oxide and a second layer, provided at least partially between at least the first and second glass substrates;
wherein no more than two glass substrates are provided in the vacuum insulating panel;
wherein tellurium oxide has the highest metal oxide content of any metal oxide in the first seal layer in terms of wt. %, wherein the second seal layer comprises an oxide of boron and/or bismuth, and wherein a thermal conductivity of the second seal layer is greater than a thermal conductivity of the first seal layer;
and
wherein material(s) and/or dimension(s) of the seal are configured so that, under reference testing conditions where the panel is positioned between warm (about 21 degrees C., about 8-10% relative humidity) and cold (about minus 18 degrees C.) areas and a wind speed (about 6 mph) applied in the cold area, until steady-state conditions have been met for temperature on both sides, and an infrared camera is used to measure glass temperature on the warm side at different locations moving laterally inward from the edge of the panel, the panel has at least two of:
(i) a warm side glass temperature rise rate (TRR) of at least about 0.14 degrees C./mm from a location 12.5 mm laterally inward from the edge of the panel to a location 62.5 mm laterally inward from the edge of the panel, where TRR=(T62.5−T12.5)/(62.5−12.5), where T62.5 is glass temperature in degrees C. on the warm side measured at a location 62.5 mm laterally inward from the edge of the panel and T12.5 is glass temperature in degrees C. on the warm side measured at a location 12.5 mm laterally inward from the edge of the panel;
(ii) a warm side glass temperature of at least 19.7 degrees C. at a location 62.5 mm laterally inward from the edge of the panel;
and
(iii) a warm side glass temperature of at least 12.4 degrees C. at a location 12.5 mm laterally inward from the edge of the panel.

9 more elements

A vacuum insulating panel comprising:

a first glass substrate;
a second glass substrate;
at least one spacer provided in a gap between at least the first and second glass substrates, wherein the gap is at pressure less than atmospheric pressure;
a seal provided at least partially between at least the first and second glass substrates, wherein the seal comprises a first seal layer comprising tellurium oxide and a second seal layer;
wherein tellurium oxide has the highest metal oxide content of any metal oxide in the first seal layer in terms of wt. %, wherein the second seal layer comprises an oxide of boron and/or bismuth, and wherein a thermal conductivity of the second seal layer is greater than a thermal conductivity of the first seal layer;
and
wherein material(s) and/or dimension(s) of the seal are configured so that, under reference testing conditions where the panel is positioned between warm (about 21 degrees C., about 8-10% relative humidity) and cold (about minus 18 degrees C.) areas and a wind speed (about 6 mph) applied in the cold area, until steady-state conditions have been met for temperature on both sides, and an infrared camera is used to measure glass temperature on the warm side at different locations moving laterally inward from the edge of the panel, a surface temperature curve for the warm side of the vacuum insulating panel is approximately characterized by the following equation:
T
⁡
(
x
)
=
T
min
+
[
(
T
max
-
T
min
)
×
(
x
n
/
(
k
n
+
x
n
)
)
]
where Tmin is a minimum measured temperature, Tmax is a maximum measured temperature, x represents x-axis which in mm represents distance moving laterally inward from the edge of the panel, n is a fitting factor/parameter, and k is a fitting factor/parameter regarding inflection point.

36 more elements

A vacuum insulating panel comprising:

a first glass substrate;
a second glass substrate;
at least one spacer provided in a gap between at least the first and second glass substrates, wherein the gap is at pressure less than atmospheric pressure;
a seal, comprising a first seal layer that is tellurium oxide based and a second seal layer, provided at least partially between at least the first and second glass substrates;
wherein no more than two glass substrates are provided in the vacuum insulating panel;
wherein the first seal layer has a density of from about 2.8-4.0 g/cm3, the second seal layer has a density of from about 3.0-4.2 g/cm3, and wherein the density of the second seal layer is at least about 0.20 g/cm3 greater than the density of the first seal layer;
and
wherein material(s) and/or dimension(s) of the seal are configured so that, under reference testing conditions where the panel is positioned between warm (about 21 degrees C., about 8-10% relative humidity) and cold (about minus 18 degrees C.) areas and a wind speed (about 6 mph) applied in the cold area, until steady-state conditions have been met for temperature on both sides, and an infrared camera is used to measure glass temperature on the warm side at different locations moving laterally inward from the edge of the panel, the panel has at least two of:
(i) a warm side glass temperature rise rate (TRR) of at least about 0.14 degrees C./mm from a location 12.5 mm laterally inward from the edge of the panel to a location 62.5 mm laterally inward from the edge of the panel, where TRR=(T62.5−T12.5)/(62.5−12.5), where T62.5 is glass temperature in degrees C. on the warm side measured at a location 62.5 mm laterally inward from the edge of the panel and T12.5 is glass temperature in degrees C. on the warm side measured at a location 12.5 mm laterally inward from the edge of the panel;
(ii) a warm side glass temperature of at least 19.7 degrees C. at a location 62.5 mm laterally inward from the edge of the panel;
and
(iii) a warm side glass temperature of at least 12.4 degrees C. at a location 12.5 mm laterally inward from the edge of the panel.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application

19/642,702Filed 9 Apr 2026

Priority

16 Apr 2024

Published

27 Aug 2026

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

E06B 3/66323
Section members positioned at the edges of the glazing unit: comprising an interruption of the heat flow in a direction perpendicular to the unit
E06B 3/6612
Units comprising two or more parallel glass or like panes permanently secured together: evacuated glazing units
E06B 3/66333
Section members positioned at the edges of the glazing unit: of unusual substances, e.g. wood or other fibrous materials, glass or other…
G01J 5/485
Thermography; Techniques using wholly visual means: temperature profile

Vacuum insulated panel with improved thermal performance proximate edge of glass during asymmetric thermal conditions

Life of this patent

Vacuum insulated panel with improved thermal performance proximate edge of glass during asymmetric thermal conditions

Life of this patent

Abstract

Claims43