Gas and liquid contact apparatus – Fluid distribution – Valved
Patent
1994-09-21
1996-05-21
Miles, Tim R.
Gas and liquid contact apparatus
Fluid distribution
Valved
261 643, 261DIG7, B01F 304
Patent
active
055186661
ABSTRACT:
In an apparatus and method for maintaining a desired (target) carbonation level in a carbonator, a control-signal originates from a reference standard of carbonated water close to the target carbonation level, which is sealed inside a pilot chamber of the regulator. The pilot chamber is exposed to the water temperature in the carbonator and is shaped and sized so as to promote rapid equalization of the temperature of the reference standard with that of the carbonated water. The pressure inside the pilot chamber is equal to the equilibrium vapor pressure, according to the temperature and carbonation level of the reference standard. This pressure is transmitted through a flexible membrane in one of the walls of the pilot chamber to a valve in the gas-supply line of the carbonator. This valve, therefore, balances the CO.sub.2 gas pressure within the carbonator with the equilibrium vapor pressure in the pilot chamber. Since the equilibrium vapor pressure in the pilot chamber is precisely equivalent to the saturated concentration of the reference standard at the prevailing temperature, the adjustment of the carbonator pressure to this equilibrium pressure results in a constant carbonation-driving force.
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Plester George
Vandekerckhove Stijn
Miles Tim R.
The Coca-Cola Company
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