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US 6,460,355 B1Granted
Environmental test chamber fast cool down and heat up system
OwnerGuy T. Trieskeyinventor
Life of this patent
Estimating the term…
Abstract
An environmental test chamber provides a fast cool down to a temperature of about −125° F. and a fast heat up of an element under test.
Claims22
An environmental test chamber fast cool down and heat up system, comprising, in combination:
- an environmental test chamber having a fast cool down evaporator and fast heat up condenser coil, wherein said coil is selectively coupled either to receive a hot refrigerant gas flow or to receive a sub-cooled refrigerant flow;
- a cascade condenser coupled to said environmental test chamber;
- a primary stage sub-system coupled to said cascade condenser;
- a secondary stage sub-system coupled to said cascade condenser;
- a thermal storage unit coupled to said primary stage sub-system and to said secondary stage sub-system;
- and
- wherein said environmental test chamber has an operational temperature down to about −125° F.
4 more elements
An environmental test chamber fast cool down and heat up system, comprising, in combination:
- an environmental test chamber having a fast cool down evaporator and fast heat up condenser coil, wherein said coil is selectively coupled either to receive a hot refrigerant gas flow or to receive a sub-cooled refrigerant flow;
- a cascade condenser coupled to said environmental test chamber;
- a primary stage sub-system coupled to said cascade condenser;
- a secondary stage sub-system coupled to said cascade condenser;
- a thermal storage unit coupled to said primary stage sub-system and to said secondary stage sub-system;
- wherein said environmental test chamber has an operational temperature down to about −125° F.;
- wherein said primary stage sub-system has up to an enthalpy change of about 104 BTUs per pound of refrigerant circulated;
- wherein said secondary stage sub-system has up to an enthalpy change of about 68 BTUs per pound of refrigerant circulated;
- and
- wherein said environmental test chamber further comprises a reheat heat exchange coil integral to said environmental test chamber.
7 more elements
An environmental test chamber fast cool down and heat up system, comprising in combination:
- an environmental test chamber having a fast cool down evaporator coil and a fast heat up condenser coil, wherein one of said evaporator coil and said condenser coil is selectively coupled either to receive a sub-cooled refrigerant gas flow or to receive a hot refrigerant flow, respectively;
- a cascade condenser coupled to said environmental test chamber;
- a primary stage sub-system coupled to said cascade condenser;
- a secondary stage sub-system coupled to said cascade condenser;
- a thermal storage unit coupled to said primary stage sub-system and to said secondary stage sub-system;
- and
- wherein said environmental test chamber has an operational temperature down to about −125° F.
4 more elements
An environmental test chamber fast cool down and heat up system, comprising in combination:
- an environmental test chamber having a fast cool down evaporator and a fast heat up condenser coil, wherein said coil is selectively coupled either to receive a hot refrigerant gas flow or to receive a sub-cooled refrigerant flow;
- a cascade condenser coupled to said environmental test chamber;
- a primary stage sub-system coupled to said cascade condenser;
- a secondary stage sub-system coupled to said cascade condenser;
- and
- a thermal storage unit coupled to said primary stage sub-system and to said secondary stage sub-system.
3 more elements
An environmental test chamber fast cool down and heat up system, comprising in combination:
- an environmental test chamber having a fast cool down evaporator coil and fast heat up condenser coil, wherein one of said evaporator coil and said condenser coil is selectively coupled either to receive a sub-cooled refrigerant gas flow or to receive a hot refrigerant flow, respectively;
- a cascade condenser coupled to said environmental test chamber;
- a primary stage sub-system coupled to said cascade condenser;
- a secondary stage sub-system coupled to said cascade condenser;
- and
- a thermal storage unit coupled to said primary stage sub-system and to said secondary stage sub-system.
3 more elements
An environmental test chamber fast cool down and heat up system, comprising in combination:
- an environmental test chamber having a fast cool down evaporator coupled to receive a sub-cooled refrigerant flow;
- a cascade condenser coupled to said environmental test chamber;
- a primary stage sub-system coupled to said cascade condenser for providing the sub-cooled refrigerant flow;
- a secondary stage sub-system coupled to said cascade condenser;
- and
- a thermal storage unit coupled to said primary stage sub-system and to said secondary stage sub-system.
3 more elements
An environmental test chamber fast cool down and heat up system, comprising in combination:
- an environmental test chamber having a heat exchanger selectively coupled either to receive a hot refrigerant gas flow or to receive a sub-cooled refrigerant flow;
- a cascade condenser coupled to said environmental test chamber;
- a primary stage sub-system coupled to said cascade condenser;
- a secondary stage sub-system coupled to said cascade condenser;
- and
- a thermal storage unit coupled to said primary stage sub-system and to said secondary stage sub-system.
3 more elements
Dependencies are inferred from the claim text.