Title:
油圧ユニット
Document Type and Number:
Japanese Patent JP6922956
Kind Code:
B2
Abstract:
A hydraulic unit (1) includes a hydraulic circuit (10) and a control device (20) that controls the hydraulic circuit (10). The hydraulic circuit (10) includes a hydraulic pump (12) that supplies hydraulic oil to a hydraulic actuator (2a), a discharge flow path (14) that connects the hydraulic pump (12) and the hydraulic actuator (2a), a valve (15) that blocks a flow of the hydraulic oil in the discharge flow path (14), and a pressure sensor (16) that detects a pressure of the hydraulic oil in the discharge flow path (14). In a pressure holding state, when the rotational frequency of the hydraulic pump (12) exceeds a predetermined first determination rotational frequency (N1) or when the discharge flow rate of the hydraulic pump (12) exceeds a predetermined first determination discharge flow rate (Ql), the control device (20) determines that the hydraulic circuit (10) is abnormal.
Inventors:
Hirokazu Nakamura
Atsuhiro Uebayashi
Hitoshi Segawa
Atsuhiro Uebayashi
Hitoshi Segawa
Application Number:
JP2019168489A
Publication Date:
August 18, 2021
Filing Date:
September 17, 2019
Export Citation:
Assignee:
Daikin Industries, Ltd.
International Classes:
F15B20/00
Domestic Patent References:
| JP2019049204A | ||||
| JP2013253674A | ||||
| JP2012097822A | ||||
| JP2011231924A |
Attorney, Agent or Firm:
Takuji Yamada
Etsuko Isoe
Toshiyuki Yamazaki
Etsuko Isoe
Toshiyuki Yamazaki