| 摘要 |
This device charges a liquid, such as water, with a gas, such as carbon dioxide, at low pressure, and consists of a gastight tank to the cover of which is attached a snap-action vent valve, a water inlet fixture, a charged-water outlet fixture, a gas inlet fixture, and a gas supply valve operated in one direction by vertical springs anchored to the cover and in the opposite direction by the varying weight of a cup of lightweight material located below the water inlet. The gas supply valve is connected to a porous gas diffuser located near the bottom of the tank. When a liquid, such as water, to be charged with gas is caused to flow into the tank, it first drops into the cup so as to cause its weight to lower the cup and overcome the force of the vertical springs. As the tank fills with water, the cup loses sufficient weight by Archimedes' principle to permit the vertical springs to simultaneously raise it and swing a yoke, which in turn causes a vent valve lever to snap over "dead center" to close the vent valve while opening the gas supply valve to permit gas to flow downward to the porous gas diffuser and thence to flow upward through the liquid so as to charge it with gas.
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