Vacuum adiabatic body, method for manufacturing same, and apparatus for manufacturing same

Patent metadata

Field	Value
Publication number	US-2025020265-A1
Application number	US-202218715343-A
Country	US
Kind code	A1
Filing date	Dec 1, 2022
Priority date	Dec 3, 2021
Publication date	Jan 16, 2025
Grant date	—

Abstract

A vacuum adiabatic body according to the present disclosure may include a first plate; a second plate; and a vacuum space provided between the first plate and the second plate. Optionally, a seal to seal the first and second plate may have improved corrosion resistance.

First claim

1 . A vacuum adiabatic body comprising:
a first plate; a second plate; a vacuum space disposed between the first plate and the second plate, and configured to be provided in a vacuum state; and a seal that includes a weld and is configured to seal the first plate and the second plate and form the vacuum space, and wherein an outline of a cross-section of the weld has at least one inflection point.

2 . The vacuum adiabatic body of claim 1 ,
wherein the inflection point is a point at which a direction of a center of curvature of a curve changes or a non-linear point, wherein the curve has a first inflection point and a second inflection point spaced apart from the first inflection point.

3 . The vacuum adiabatic body of claim 2 ,
wherein a size A of an upper end of the weld, a size B between the opposite inflection points, a size C of a transverse extension portion, and an angle between a cusp and the first inflection point, A/B of at least one cutting surface is greater than 0.5 and less than 0.9; C/A of at least one cutting surface is greater than 0 and less than 0.2; an area in which C/A of at least one cutting surface is 0.2 or more is 5% or less, or θ of at least one cut plane is greater than 30 degrees and less than 70 degrees.

4 . The vacuum adiabatic body of claim 3 ,
wherein a ratio of the cutting surface in which A/B is greater than 0.5 and smaller than 0.9 is 0.8 or more, wherein a ratio of the cutting surface in which C/A is greater than 0 and less than 0.2 is 0.8 or more, or wherein a ratio of the cutting surface in which θ is greater than 30 degrees and smaller than 70 degrees is 0.8 or more.

5 . The vacuum adiabatic body of claim 1 ,
wherein a ratio of a standard deviation of a depth of the weld to a depth of the weld is 0.5 or less.

6 . A method for manufacturing a vacuum adiabatic body to have a seal that seals a vacuum space between a first plate and a second plate, the method comprising:
manufacturing a component to be applied to the vacuum adiabatic body; assembling the component; sealing, by the seal, an outer wall of the vacuum space to block the vacuum space from a external space; exhausting internal air of the vacuum space; and providing a device configured to use the vacuum adiabatic body; wherein the seal is provided as a weld, and welding of the weld is performed in a transient mode.

7 . The method for manufacturing a vacuum adiabatic body of claim 6 ,
wherein an energy density (J/cm2) of a laser applied to the weld is 1,000 or more and 10,000 or less.

8 . The method for manufacturing a vacuum adiabatic body of claim 6 ,
wherein an energy density (J/cm2) of a laser applied to the weld is 1,000 or more and 20,000 or less.

9 . The method for manufacturing a vacuum adiabatic body of claim 6 ,
wherein an energy density (J/cm2) of a laser applied to the weld is 1,000 or more and 15,000 or less.

10 . The method for manufacturing a vacuum adiabatic body of claim 6 ,
wherein an energy density (J/cm2) of a laser applied to the weld is 1,000 or more and 8,000 or less.

11 . The method for manufacturing a vacuum adiabatic body of claim 6 , wherein an output to the first plate is first applied during the welding, and the second plate under the first plate;
wherein a depth of the weld compared to a thickness of the first plate is 100 to 500%, wherein the depth of the weld compared to the thickness of the first plate is 100 to 400%, wherein the depth of the weld compared to the thickness of the first plate is 110 to 300%, or wherein the depth of the weld compared to the thickness of the first plate is 150 to 300%.

12 . The method for manufacturing a vacuum adiabatic body of claim 11 ,
wherein a beam diameter of a laser beam is 100 micrometers or more and 200 micrometers or less, wherein a laser movement speed of the laser beam is 7˜15 m/min, or wherein the output of the laser beam output is 200 to 800 W.

13 . A method for manufacturing a vacuum adiabatic body to have a seal that seals a vacuum space between a first plate and a second plate, the method comprising:
manufacturing a component to be applied to the vacuum adiabatic body; assembling the component; sealing, by the seal, an outer wall of the vacuum space to block the vacuum space from an external space; exhausting internal air of the vacuum space; and providing a device configured to use the vacuum adiabatic body; wherein the seal includes a plurality of cutting surfaces formed along a longitudinal direction to be sealed, wherein at least one of the plurality of cutting surface shapes is A/B≥0.8, and wherein an injection flow rate of a shielding gas during the sealing is 2 liters/min or less.

14 . The method for manufacturing a vacuum adiabatic body of claim 13 ,
wherein the injection flow rate of the shielding gas is 2 liters/min when an area satisfying the relationship of A/B≥0.8 is 80% or more.

15 . A method for manufacturing a vacuum adiabatic body to have a seal that seals a vacuum space between a first plate and a second plate, the method comprising:
manufacturing a component to be applied to the vacuum adiabatic body; assembling the component; sealing, by the seal, an outer wall of the vacuum space to block the vacuum space from an external space; exhausting internal air of the vacuum space; and a device configured to use the vacuum adiabatic body; wherein the seal includes a plurality of cutting surfaces formed along a longitudinal direction to be sealed, wherein at least one of the plurality of cutting surface shapes is A/B≥0.8, and wherein an injection flow rate of a shielding gas during the sealing is 2.65 liters/min or less.

16 . The method for manufacturing a vacuum adiabatic body of claim 15 ,
wherein the injection flow rate of the shielding gas is 2.65 m/sec when an area satisfying the relationship of A/B≥0.8 is 80% or more.

17 . A method for manufacturing a vacuum adiabatic body to have a seal that seals a vacuum space between a first plate and a second plate, the method comprising:
manufacturing a component to be applied to the vacuum adiabatic body; assembling the component; sealing, by the seal, an outer wall of the vacuum space to block the vacuum space from an external space; exhausting internal air of the vacuum space; and providing a device configured to use the vacuum adiabatic body; wherein the seal is provided as a weld configured to overlap and weld the first plate and the second plate, the weld is provided by laser welding, and a relationship between a beam diameter D of a laser and a thickness t1 of the first plate satisfies 0.5≤(D/t1)≤1.

18 . A method for manufacturing a vacuum adiabatic body to have a seal that seals a vacuum space between a first plate and a second plate, the method comprising:
manufacturing a component to be applied to the vacuum adiabatic body; assembling the component; sealing, by the seal, an outer wall of the vacuum space to block the vacuum space from an external space; exhausting internal air of the vacuum space; and providing a device configured to use the vacuum adiabatic body; wherein the seal is provided as a weld by a laser and is configured to overlap and weld the first plate and the second plate, and wherein, when a ratio t2/t1 of a thickness t1 of the first plate to a thickness t2 of the second plate satisfies 2≤(t2/t1)≤20, a relationship between a beam diameter D of the laser and the thickness t1 of the first plate satisfies 0.5≤(D/t1)≤3.

19 . A method for manufacturing a vacuum adiabati

Assignees

• Lg Electronics Inc

Inventors

• Jung Wonyeong
• Youn Deokhyun
• Ki Duchan

Classifications

• F25D2201/14

  using subatmospheric pressure · CPC title

• F25D23/06

  Walls (F25D23/08 takes precedence; containers with thermal insulation B65D81/38) · CPC title

• F25D23/062

  defining a cabinet · CPC title

• F16L59/065 Primary

  using vacuum (F16L59/075 takes precedence) · CPC title