Dosing device for adding a controlled amount of a gas to a fluid
AssigneeSiemens Elema AB
InventorGeorgios Psaros
Life of this patent
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Abstract
In a dosing device and method for controlled dosing of a first gas into a second gas or liquid membrane which is permeable to the first gas separates the first gas from the second gas or liquid. Dosing of the first gas is performed by controlling diffusion through the membrane. The size of the active diffusion area can be regulated by a barrier which is moveable in relation to the membrane. When the barrier is moved in relation to the membrane, a larger or smaller part of the membrane's diffusion area can be exposed to the second gas or liquid. Alternatively, the membrane's permeability can be controlled or the partial pressure of the first gas can be controlled.
Claims32
A dosing device comprising:
- a gas container containing a gas;
- a fluid container containing a fluid;
- at least one membrane separating said gas from said fluid and having an active area with a permeability include means for permitting a variable amount of said gas to diffuse through said active area into said fluid;
- and
- means for controlling diffusion of said gas through said active area by varying said amount of said gas diffused through said active area into said fluid.
A dosing method comprising the steps of:
- containing a gas in a gas container;
- containing a fluid in a fluid container;
- separating said gas from said fluid by at least one membrane having an active area with a permeability and permitting a variable amount of said gas to diffuse through said active area into said fluid;
- and
- controlling diffusion of said gas through said active area by varying said amount of said gas diffused through said active area into said fluid.
Dependencies are inferred from the claim text.