Abstract: An electronic controller (16) controls the operation of an electrochemical oxygen generating system (14) producing a desired gas. The product gas is fed to a storage unit (12) or a regulator (28) and pulsing valve (28) controlling the gas flow to a user. A two-stage system (180) combines a low pressure 100 and a high pressure (150) gas generating subsystems. The low pressure subsystem (100) uses IMAT's (106) to pump oxygen from ambient air to generate a low-pressure. The high pressure subsystem (150) uses IMAT's (160) to pump oxygen to high-pressure oxygen storage devices (194).

Abstract: A fluid routing system for use in a fluid line is set forth which includes a fluid routing mechanism having a housing and a block, and a removable treatment device. The housing has an internal chamber, an inlet port for attaching to one part of a fluid line, an outlet port for attaching to another part of the fluid line, an inlet channel connecting the inlet port to the internal chamber, and an outlet channel connecting the internal chamber to the outlet port. The block is capable of movement between a first and second position and is disposed within the internal chamber of the housing. The block has a first internal cavity, a second internal cavity, an exterior surface, an inlet passageway connecting the first internal cavity with the exterior surface, and an outlet passageway connecting the second internal cavity with the exterior surface. The inlet passageway and the outlet passageway are configured to retain fluid therein when the treatment device is removed.

Abstract: A refrigerator has fresh food and freezer compartments, and each of the fresh food and freezer compartments has upper and lower portions. A first air duct extends from the upper portion of the freezer compartment to the upper portion of the fresh food compartment, and a second air duct extends between the lower portion of the freezer compartment and the lower portion of the fresh food compartment. A first fan is arranged to draw first air through the first air duct from the upper portion of the freezer compartment and to discharge the first air into the upper portion of the fresh food compartment. A second fan is arranged to draw second air from the lower portion of freezer compartment and to discharge the second air into the upper portion of the freezer compartment.