| 摘要 |
PURPOSE: An automatic gas changer for a gas tank is provided to automatically change a consumed gas tank with a spare gas tank by sensing the absence of gas when gas stored in a gas tank is consumed and the gas tank must be exchanged to the spare gas tank. CONSTITUTION: A controller(10) controls an overall operation and has a display and a gas alarm. The first connecting valve(20) is connected to an external gas tank and has the first valve handle(30), and a second valve connecting valve(100) is positioned to oppose the first connecting valve(20) and has the second valve handle(90). The first stopper(40) is connected to the first connecting valve(20) to turn on/off the first valve handle(30), and the second stopper(80) is connected to the second connecting valve(100) to turn on/off the second valve handle(90). A gas supply pipe(110) is connected to the first and second connecting valves(20,100) to supply gas. A pressure switch(70) measures the internal gas pressure of the gas supply pipe(110).
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