Vacuum heat insulation panel

• US 5,885,682 A
• Filed: 06/29/1998
• Issued: 03/23/1999
• Est. Priority Date: 12/02/1994
• Status: Expired due to Fees

• Current Assignee: Matsushita Refrigeration Company (Panasonic Holdings Corporation), SAES Getters SpA (SAES Getters S)
• Original Assignee: Matsushita Refrigeration Company (Panasonic Holdings Corporation)
• Inventors: Miyaji, Noriyuki, Tanimoto, Yasuaki
• Primary Examiner(s): THOMAS, ALEXANDER S
• Application Number:
  US09/106,301
• Time in Patent Office: 267 Days
• Field of Search: 428/69, 428/71, 428/76, 428/403, 428/404, 445/55, 252/181.1, 252/181.7
• US Class Current: 428/69
• CPC Class Codes: F25D 2201/14 using subatmospheric pressure
• CPC Class Codes: F25D 23/063 formed by an assembly of panels
• CPC Class Codes: Y10T 428/231 Filled with gas other than air; or under vacuum
• CPC Class Codes: Y10T 428/233 Foamed or expanded material encased

Abstract

A vacuum heat insulation panel for refrigerators and freezers comprises a thin-box shaped enclosure (4) for controlling permeation of the open air, and therein a core member (2) with thermal insulating properties and a barium-lithium alloy getter (3) which has long life time as getter.

Claims

1. A vacuum heat insulation panel comprising an enclosing member for controlling permeation of the open air, a core member defining a shape and having thermal insulating properties and contained in said enclosing member, and a non-evaporating getter contained in said enclosing member, said non-evaporating getter being of a powdery form having powders, each of which is covered with a coat layer of a water-adsorbent.

2. A vacuum heat insulation panel in accordance with claim 1, wherein said non-evaporating getter is an alloy containing barium and lithium.

3. A vacuum heat insulation panel comprising:

an enclosing member for controlling permeation of the open air,

a core member defining a shape and having thermal insulating properties, and

a non-evaporating getter which is of a powdery form having powders each of which is covered with a coat layer of a water adsorbent.

4. A vacuum heat insulation panel comprising an enclosing member for controlling permeation of the open air, a core member defining a shape and having thermal insulating properties and contained in said enclosing member, and a non-evaporating getter which is an alloy containing barium and lithium, and which is contained in said enclosing member, wherein the surface of said non-evaporating getter is of a powdery form having powders, each of which is covered with a coat layer of a water adsorbent.

5. A heat insulating thin box-like member comprising:

a thin box to insulate heat, a foamed heat insulator and a vacuum heat insulation panel contained in a space of said thin box to insulate heat, and

said vacuum heat insulation panel comprises an enclosing member for controlling permeation of the open air,

a core member defining a shape and having thermal insulating properties and contained in said enclosing member, and

a non-evaporating getter contained in said enclosing member, said non-evaporating getter being of a powdery form having powders, each of which is covered with a coat layer of a water adsorbent.

6. A heat insulating thin box-like member in accordance with claim 5, wherein said non-evaporating getter is an alloy containing barium and lithium.