| 摘要 |
A steam generator particularly for producing steam to be supplied to a flow of ventilation air for increasing the humidity thereof, comprising a water container, means for heating the water in the container in order to produce steam, means for supplying water to the container for replacing the water leaving the container as steam, means for intermittently draining off the water from the container so as to empty it for water with high mineral concentration in order to avoid or reduce permanent precipitations, the water inlet opening being spaced from the drain opening of the container and being located so as to cause agitation of the bottom water in the container when water is let thereinto. Preferably the valves are automatically operated in such a manner that the inlet valve is kept open when the draining valve is open whereby the bottom water with its precipitations is agitated during the draining operation.
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