公开(公告)号：US20230287899A1

公开(公告)日：2023-09-14

申请号：US17927315

申请日：2021-04-20

Applicant: EBARA CORPORATION

Inventor： Akinori MURATA ,  Shuichiro HONDA ,  Hiroyuki FUJISAWA ,  Satoshi YAMAZAKI

IPC: F04D29/42 ,  F04D13/06

CPC classification number: F04D29/4293 ,  F04D13/06

Abstract: The present invention relates to a pump casing and a pump apparatus. The pump casing (5) includes a suction nozzle (100) with formed a suction port (12). The suction nozzle (100) slopes downward toward the suction port (12).

公开(公告)号：US20220290675A1

公开(公告)日：2022-09-15

申请号：US17635082

申请日：2020-06-10

Applicant: Ebara Corporation

Inventor： Hiroyuki KAWASAKI ,  Takayuki MIYAMOTO ,  Miwa HIDEKURA ,  Hoechun KIM ,  Satoshi YAMAZAKI ,  Xinshuai FAN

IPC: F04D13/06 ,  F04D1/00 ,  F04D29/22

Abstract: The present invention relates to a pump apparatus for delivering a liquid. The pump apparatus includes a pump (1) having an impeller (5), an electric motor (7) for rotating the impeller (5), and an inverter (10) for driving the electric motor (7) at variable speed. The impeller (5) has a non-limit load characteristic in a predetermined discharge flow-rate range (R). The inverter (10) is configured to drive the electric motor (7) at a preset target operating point (TO) with a rotation speed higher than a rotation speed corresponding to a power frequency of a commercial power source.