公开(公告)号：US20250012475A1

公开(公告)日：2025-01-09

申请号：US18894072

申请日：2024-09-24

Applicant: TONGZHOU LANHAI (BEIJING) HOLDING CO.,LTD

Inventor： Lin DONG ,  Ning SUN ,  Xiangfang LI

IPC: F24F11/75 ,  F24F11/89 ,  F24F110/40 ,  G01F1/42

Abstract: An air volume control valve capable of accurately measuring an air volume is provided. The air volume control valve includes a round-shaped valve body, and a valve blade and an orifice plate provided in the round-shaped valve body, where the orifice plate is located upstream of the valve blade; an upstream pressure tapping port and a downstream pressure tapping port are respectively provided upstream and downstream of the orifice plate; a distance from both the upstream pressure tapping port and the downstream pressure tapping port to the orifice plate is 0.5 times a valve diameter; the valve blade is located downstream of the downstream pressure tapping port; an inlet side of the round-shaped valve body is provided with a convergent duct fitting; and the convergent duct fitting is located at a distance of once the valve diameter upstream of the orifice plate and is tapered along an air flow direction.