| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent a bimetal ring from being hit by a valve disc at high temperature.SOLUTION: A valve disc 11 is disposed in a variable pressure chamber 4 composed of inner and outer ring valve seats 6, 7 and a cover member 5, and an open-end bimetal ring 13 is disposed on a conical inclined surface 12 formed on an outer periphery of the outer ring valve seat 7. An open-end waveform spring ring 14 as an elastic member kept into contact with an inner wall of the outer cover member 5 at its outer periphery, is disposed outside of the bimetal ring 13, an outer periphery of the bimetal ring 13 expanded at a high temperature is kept into contact with an inner periphery of the waveform spring ring 14 to hold the bimetal ring 13 by the waveform spring ring 14, and the outer periphery of the bimetal ring 13 contracted and closed at a low temperature, is separated from the waveform spring ring 14, so that the bimetal ring 13 is not interfered by the waveform spring ring 14.</p> |
