Vacuum insulation panel manufacturing method, and vacuum insulation panel

Patent metadata

Field	Value
Publication number	US-10710196-B2
Application number	US-201816229233-A
Country	US
Kind code	B2
Filing date	Dec 21, 2018
Priority date	Jun 13, 2016
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

A vacuum insulation panel manufacturing method that makes it possible to manufacture low-cost, high-performance vacuum insulation panels, and a vacuum insulation panel are provided. This method of manufacturing a vacuum insulation panel ( 1 ) involves: a stacking step in which a first metal plate ( 20 ) is stacked on one side of an insulating core material ( 10 ), and in which a backing member ( 50 ) having an opening ( 51 ) and a second metal plate ( 30 ) having an evacuation port ( 32 ) are stacked, with the opening ( 51 ) and the evacuation port ( 32 ) stacking, on the other surface of the core member ( 10 ) in the order of backing member ( 50 ) and second metal plate ( 30 ) from the core member ( 10 ) side; a first welding step for welding outwards of where the core member ( 10 ) is arranged in the first metal plate ( 20 ) and the second metal plate ( 30 ); an evacuating step from the evacuation port ( 32 ) to create a vacuum in an inner area which is held between the first metal plate ( 20 ) and the second metal plate ( 30 ) and in which the core member ( 10 ) is arranged; and a laser welding step in which, in a state in which the inner area is made into a vacuum by the evacuating step, the evacuation port ( 32 ) is sealed by means of a sealing material ( 60 ) and the sealing material ( 60 ), the second metal plate ( 30 ) and the backing member ( 50 ) are laser welded.

First claim

The invention claimed is:

1. A vacuum insulation panel manufacturing method comprising:
a stacking step in which a first metal plate is stacked on one side of an insulating core member, and a second metal plate having an evacuation port, and a reinforcing material having an opening are stacked on the other side of the core member sequentially from the core member, such that the evacuation port and the opening are stacked,
a first welding step for welding outwards of where the core member is arranged in the first metal plate and the second metal plate;
an evacuating step for applying a vacuum in an inner area which is held between the first metal plate and the second metal plate and in which the core member is arranged, from the evacuation port and the opening; and
a laser welding step in which, in a state in which the inner area is made into a vacuum by the evacuating step, the evacuation port and the opening are sealed by means of a sealing member, and the sealing member and the reinforcing material are laser welded, or the sealing member, the reinforcing material and the second metal plate are laser welded.

2. The vacuum insulation panel manufacturing method according to claim 1 , wherein the laser welding step is
for lowering the sealing member and blocking the evacuation port and the opening by way of the sealing member, an outer periphery of the sealing member being held by a holding plate including a hole for allowing laser light to pass through,
the sealing member is pressed toward the reinforcing material side, and
in a state in which a stacked portion between the sealing member, the reinforcing material and the second metal plate is restrained without any gap, and
the sealing member, the reinforcing material and the second metal plate are laser welded.

3. The vacuum insulation panel manufacturing method according to claim 2 , wherein
the sealing member is made of a magnetic body, and
the holding plate for holding the sealing member includes a magnet and holds the sealing member by using a magnetic force.

4. The vacuum insulation panel manufacturing method according to any one of claim 2 ,
wherein the holding plate for holding the sealing member is supported by way of a support rod attached in three places along an outer periphery, and
wherein an upper end of the support rod is fixed to a lifting plate, passing through an outer periphery of a portion where a window is provided to an upper middle portion of the chamber, in which quartz glass is attached to the window.

5. The vacuum insulation panel manufacturing method according to claim 1 , wherein the stacking step includes a step of welding the second metal plate and the reinforcing material.

6. The vacuum insulation panel manufacturing method according to 1 , wherein
the evacuating step is for starting evacuating from the evacuation port to apply a vacuum in an inner area which is held between the first metal plate and the second metal plate and in which the core member is arranged, by vacuumizing a chamber
by covering with the chamber a region including the opening of the reinforcing material,
in a state in which the sealing member is temporarily lowered and allowed to approach the evacuation port.

7. The vacuum insulation panel manufacturing method according to claim 6 ,
wherein laser irradiation is performed from an outer side of the chamber in the laser welding step, and
wherein only the sealing member and the reinforcing material are joined, and laser welding is performed under a condition that the second metal plate does not melt.

8. The vacuum insulation panel manufacturing method according to any one of claim 1 , wherein the first welding step is a seam welding step.

9. A vacuum insulation panel comprising:
an insulating core member;
a first metal plate arranged on one side of the core member;
a second metal plate arranged on the other surface of the core member sequentially from the core member and having an evacuation port
a reinforcing material having an opening at a position stacking with the evacuation port; and
a sealing member sealing the opening,
wherein outer sides of regions of the first metal plate and the second metal plate between which the core member is sandwiched are welded,
wherein the sealing member, the reinforcing material, and the second metal plate are welded, and
wherein a vacuum state is created between the first metal plate and the second metal plate.

10. The vacuum insulation panel according to claim 9 , wherein the sealing member is a magnetic body.

Assignees

• Nisshin Steel Co Ltd

Inventors

• Azuma Tsutomu
• Mishima Hirohisa
• Nakako Takefumi

Classifications

• B23K11/061 Primary

  for welding rectilinear seams · CPC title

• B32B3/00

  Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form · CPC title

• B23K11/34

  Preliminary treatment · CPC title

• F25D2201/14

  using subatmospheric pressure · CPC title

• B23K26/21 Primary

  by welding · CPC title