Getter system for vacuum insulation panel

• US 5,532,034 A
• Filed: 12/06/1994
• Issued: 07/02/1996
• Est. Priority Date: 12/06/1994
• Status: Expired due to Term

• Current Assignee: Whirlpool Corporation
• Original Assignee: Whirlpool Corporation
• Inventors: Cur, Nihat O., Kirby, David B.
• Primary Examiner(s): Thomas, Alexander S.
• Application Number:
  US08/349,836
• Time in Patent Office: 574 Days
• Field of Search: 428/69, 428/71, 428/72, 428/74, 428/76, 428/913, 52/406.2, 52/406.3, 156/286
• US Class Current: 428/69
• CPC Class Codes: B32B 2323/043 HDPE, i.e. high density polyethylene
• CPC Class Codes: B32B 2323/046 LDPE, i.e. low density polyethylene
• CPC Class Codes: B32B 2331/04 Polymers of vinyl acetate, e.g. PVA
• CPC Class Codes: B32B 27/00 Layered products comprising a layer of synthetic resin fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/306 comprising vinyl acetate or vinyl alcohol (co)polymers
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/322 comprising halogenated polyolefins, e.g. PTFE
• CPC Class Codes: E04B 1/803 with vacuum spaces included in the slab
• CPC Class Codes: F16L 59/065 using vacuum F16L59/075 takes precedence
• CPC Class Codes: F25D 2201/126 of cellular type
• CPC Class Codes: F25D 2201/1262 with open cells
• CPC Class Codes: F25D 2201/14 using subatmospheric pressure
• CPC Class Codes: F25D 23/063 formed by an assembly of panels
• CPC Class Codes: Y02A 30/242 Slab shaped vacuum insulation
• CPC Class Codes: Y02B 80/10 Insulation, e.g. vacuum or aerogel insulation
• CPC Class Codes: Y10T 428/231 Filled with gas other than air; or under vacuum
• CPC Class Codes: Y10T 428/234 including elements cooperating to form cells
• CPC Class Codes: Y10T 428/237 Noninterengaged fibered material encased [e.g., mat, batt, etc.]

Abstract

A getter system is provided for use with an evacuated container such as a vacuum insulation panel. The getter system has a first, activated getter material capable of gettering at least a first gas or vapor and a second, different gas or vapor. The getter system also has a second, activated getter material capable of gettering the first, but not the second, gas or vapor. Finally, the getter system includes packaging for the first and second getter materials, such that the first and second getter materials may be placed together within a single compartment of the evacuated container and the second getter material will be more readily exposed to the first gas or vapor than the first getter material. In this manner, the first getter material will be protected from the first gas or vapor even though it is already activated.

Claims

1. An evacuated container comprising:

an outer barrier wall defining a compartment;

a microporous insulation filler container within said compartment;

a first getter material contained within said compartment capable of gettering at least a first gas or vapor and a second, different gas or vapor;

a second getter material also contained within said compartment capable of gettering said first, but not said second, gas or vapor;

packaging containing said first and second getter materials and excluding said microporous insulation filler, such that said second getter material will be more readily exposed to said first gas or vapor than said first getter material, wherein said first getter material will be more readily exposed to said first gas or vapor than said first getter material, wherein said first getter material will be protected from said first gas or vapor.

2. A getter system according to claim 1, wherein said packaging comprises:

a first pouch formed of a material that readily passes said second gas or vapor, but does not readily pass said first gas or vapor, receiving said first getter material; and

a second pouch formed of a material that readily passes said first gas or vapor, receiving said second getter material.

3. A getter system according to claim 2, wherein said first pouch is positioned within an interior of said second pouch.

4. A getter system according to claim 1, wherein said packaging comprises:

a package having a wall portion impermeable to both said first and second gases or vapors;

placement of said first getter material adjacent to said wall portion;

placement of said second getter material over said first getter material so as to prevent any exposure of said first getter material where said first getter material is not in contact with said wall portion; and

a covering for said package made of a material permeable to both said first and second gases or vapors to prevent said first and second getters from dislodging from said package.

5. A getter system according to claim 1, wherein said packaging comprises:

a package having a first chamber and a second chamber;

said first chamber receiving said first getter material and having an outside wall impermeable to said first and second gases or vapors;

said second chamber receiving said second getter material and having an outside wall permeable to said first and second gases or vapors;

said first and second chambers being joined along an inside wall which is permeable to said second gas or vapor;

wherein all of said first and second vapors entering said package must enter through said second chamber.

6. A getter system according to claim 1, wherein said first getter material is a reactive metal or alloy getter and said second getter material is a desiccant, and wherein said first gas or vapor is water vapor and said second gas or vapor is a permanent gas.

7. A getter system according to claim 1, wherein said evacuated container is a vacuum insulation panel.

8. A getter system for use with a container evacuated of gases, but containing a microporous insulation filler comprising:

a first getter material capable of gettering at least a first gas or vapor and a second, different gas or vapor;

a second getter material capable of gettering said first, but not said second, gas or vapor;

packaging containing said first and second getter materials and excluding the microporous insulation filler, such that said first and second getter materials may be placed within a single compartment of said evacuated container and said second getter material will be more readily exposed to said first gas or vapor than said first getter material, wherein said first getter material will be protected from said first gas or vapor,

wherein said packaging comprises a package having a first chamber and a second chamber;

said first chamber receiving said first getter material and having an outside wall impermeable to said first and second gases or vapors;

said second chamber receiving said second getter material and having an outside wall permeable to said first and second gases or vapors;

said first and second chambers being joined along an inside wall which is permeable to said second gas or vapor and is impermeable to said first gas or vapor;

wherein all of said first and second vapors entering said package must enter through said second chamber.

9. A getter system for use with an evacuated container comprising:

a first getter material capable of gettering at least a first gas or vapor and a second, different gas or vapor;

a second getter material capable of gettering said first, but not said second, gas or vapor;

packaging for said first and second getter materials, such that said first and second getter materials may be placed within a single compartment of said evacuated container and said second getter material will be more readily exposed to said first gas or vapor than said first getter material, wherein said first getter material will be protected from said first gas or vapor;

said first getter material also being capable of gettering at least a third, different gas or vapor;

a third getter material capable of gettering at least said third gas or vapor, but not said first or second gas or vapor;

said packaging also packaging said third getter, such that said first, second and third getter materials may be placed together within said single compartment of said evacuated container and said third getter material will be more readily exposed to said third gas or vapor than said first or second getter materials.

10. A getter system according to claim 9, wherein said third getter material is iron and said third gas or vapor is oxygen.

11. A getter system for use with a container evacuated of gases, but containing a microporous insulation filler comprising:

a first getter material capable of gettering at least a first gas or vapor and a second, different gas or vapor;

a second getter material capable of gettering said first, but not said second, gas or vapor;

packaging containing said first and second getter materials and excluding the microporous insulation filler, such that said first and second getter materials may be placed within a single compartment of said evacuated container and said second getter material will be more readily exposed to said first gas or vapor than said first getter material, wherein said first getter material will be protected from said first gas or vapor,

wherein said first getter material is a reactive metal or alloy getter and said second getter material is a combination of desiccant and activated carbon, and wherein said first gas or vapor is an organic gas and said second gas or vapor is a permanent gas.

12. A vacuum insulation panel comprising:

a flexible material outer barrier wall defining a compartment;

a microporous insulation filler contained within said compartment;

a first getter material contained within said compartment capable of gettering at least a first gas or vapor and a second, different gas or vapor;

a second getter material also contained within said compartment capable of gettering said first, but not said second, gas or vapor;

packaging containing said first and second getter materials and excluding said microporous insulation filler, such that said second getter material will be more readily exposed to said first gas or vapor than said first getter material, wherein said first getter material will be protected from said first gas or vapor.