| 摘要 |
<p>Disclosed are automatic liquid changeover device and method using a vaporizer, in which a pressure of gas in the gaseous state obtained by vaporizing gas in a liquid state by the vaporizer and exhausted from the vaporizer is measured and the flow of the supplied gas in the liquid state is changed based on the measured pressure of the gas in the gaseous state, thereby achieving safe and rapid changeover of the flow of the gas and rapidly cutting off the flow of the gas in case that the gas has an excessively abnormal pressure.</p> |
