公开(公告)号：US20220170662A1

公开(公告)日：2022-06-02

申请号：US17437205

申请日：2020-01-23

Applicant: NEC Corporation

Inventor： Yoshinori MIYAMOTO ,  Minora YOSHIKAWA ,  Nirmal Singh RAJPUT ,  Takafumi NATSUMEDA

IPC: F24F11/77 ,  H05K7/20

Abstract: An air conditioning control device includes a differential pressure calculation unit that calculates differential pressure between the intake side and the exhaust side of a rack containing at least one server, and a rotational speed control unit that controls the rotational speed of an air conditioning fan on the basis of the differential pressure. The rotational speed control unit increases or decreases the rotational speed of the air conditioning fan depending on the variation of the differential pressure in the event of a change in the rotational speed of the air conditioning fan.