| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust and drain valve capable of restraining an inside flow passage from being blocked up by freezing even under a low temperature environment. <P>SOLUTION: An inflow flow passage is formed with an inner diameter gradually changing part 85v where an inner diameter is gradually reduced toward the valve port side, and a step height surface 85p being an annular surface of continuing in the peripheral direction by extending in the orthogonal direction to the forming direction of an orifice hole 85f, is formed between the inner diameter gradually changing part 85v and the orifice hole 85f. Thus, when arranging the exhaust drain valve so that the inflow flow passage becomes horizontal, a waterdrop 999 remaining in a ceiling part 85w of the inner diameter gradually changing part 85v, flows to the step height surface 85p by going along the ceiling part 85w of the inner diameter gradually changing part 85v by its dead weight, and flows down downward by going along the step height surface 85p, and intrusion of the waterdrop 999 into the orifice hole 85f is restrained, and blocking-up caused by freezing of moisture in the orifice hole 85f is restrained under the low temperature environment. <P>COPYRIGHT: (C)2013,JPO&INPIT |
