| 摘要 |
PROBLEM TO BE SOLVED: To enable bleeding to be carried out stably and positively without having any relation with a thermostat fixing angle, and without increasing a size of a bleeding valve and even if air stayed near the thermostat shows air bubbles.SOLUTION: A bleeding valve 31 arranged in a thermostat installed in a cooling water passage for circulating cooling water between an internal combustion engine and a radiator comprises: a valve body 33 for closing a bleeding hole 32; a dome-like part 34 that can be deformed with its section shape being inverted; a valve rod 35 connecting the center part of the dome-like part with the valve body to each other; a cylindrical box-like part 36 having a bottom part storing the dome-like part while the outer circumferential part of the dome-like part being held and with openings 39 communicated across the inside and outside from the dome-like part to the bleeding hole formed, and the valve body opens or closes the bleeding hole in response to inverted deformation of the dome-like part generated from variation in pressure state around the bleeding valve. |
