| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilator which can eliminate an anxiety that a bypass value becomes inoperative due to freezing in a severe winter season.SOLUTION: Related to a ventilator which collects and removes oil by introducing a blowby gas of an engine and making the blowby gas pass to an element, valve-opens the bypass valve 8 by the pressure of the blowby gas at the clogging of the element, and can open the bypass passage which bypasses the element, a drain hole 15 is formed between upper peripheral edges of a valve seat 13 at the surroundings of a communication port 12 which is opened at a ceiling part of a housing 9 of the bypass valve 8, and a valve body 10 which is accommodated in the housing 9 so as to be liftable, water adhering to an upper face of the valve body 10 which is constantly closed is drained as needed through the drain hole 15, and the water is made not to stay on the upper face of the valve body 10 which is surrounded by the valve seat 13. |
