Liquid-metering device for a gas analyzer
AssigneeSiemens Aktiengesellschaft
InventorUdo Gellert
Life of this patent
Estimating the term…
Abstract
A liquid-metering device comprising a droplet generator including a reservoir and, connected to the latter, a displacement space which is modifiable by an electromechanical transducer and which has an outlet opening and, upon excitation of the transducer, shoots a liquid droplet from a cold area into a heatable area through or counter to a gas stream generated by a gas source. To make the device suitable for automatic and quasi-continuous liquid metering in process analysis, a heatable evaporation chamber is provided through which the liquid to be metered flows via valves, and, between the evaporation chamber and the reservoir, a condensate chamber is connected via further valves. The condensate chamber and the reservoir are connected via additional valves and a pressure regulator to the gas source.
Claims5
A liquid metering device for a gas analyzer, comprising:
- a gas source;
- a droplet generator comprising a reservoir, an electromechanical transducer, a liquid inlet, an outlet opening and a displacement space connected to the reservoir and modifiable by electromechanical transducer, the displacement space shooting a liquid droplet through or counter to a gas stream generated by the gas source from a cold area into a heatable area upon excitation of the transducer;
- a heatable vaporization chamber comprising, for a liquid to be metered, a liquid supply having a first valve, a liquid drain having a second valve, and a vapor outlet;
- and
- a condensate chamber comprising a vapor or condensate inlet connected to the vapor outlet by a third valve, a condensate outlet and a gas inlet, the condensate outlet being connected by a fourth valve to the liquid inlet of the reservoir of the droplet generator, and the reservoir of the droplet generator including a liquid outlet having a fifth valve, and a gas inlet;
- and
- a pressure regulating unit connected at a first outlet by a sixth valve to the gas inlet of the condensate chamber;
- wherein the gas source is connected to a second outlet by a seventh valve to the gas inlet of the reservoir of the droplet generator, and provides the gas stream at a third outlet.
Dependencies are inferred from the claim text.