Title:
ABNORMALITY DETECTION SYSTEM, DETERMINATION DEVICE, ABNORMALITY DETECTION METHOD, DETERMINATION METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2022/185605
Kind Code:
A1
Abstract:
This abnormality detection system comprises: a solenoid valve; a power supply which applies a voltage to a load terminal of the solenoid valve via a switch circuit and a diode; a drive circuit which drives the solenoid valve via the load terminal; a first detection unit which detects a voltage indicating the state of the drive circuit; a second detection unit which detects a voltage associated with a voltage of the load terminal of the solenoid valve; and a determination unit which determines whether the load terminal is in a ground fault state on the basis of the detection result from the first detection unit and the detection result from the second detection unit when the switch circuit is in an ON state.
Inventors:
SATO HIDETAKA (JP)
OSAKI TOMOYASU (JP)
NAGASAKA KEIJI (JP)
KOJIMA RYOTA (JP)
OSAKI TOMOYASU (JP)
NAGASAKA KEIJI (JP)
KOJIMA RYOTA (JP)
Application Number:
PCT/JP2021/039563
Publication Date:
September 09, 2022
Filing Date:
October 26, 2021
Export Citation:
Assignee:
MITSUBISHI HEAVY IND THERMAL SYSTEMS LTD (JP)
International Classes:
F16K31/06; G01R31/00; G01R31/52
Foreign References:
| JP2019143538A | 2019-08-29 | |||
| JP2018179885A | 2018-11-15 | |||
| CN107167694A | 2017-09-15 | |||
| CN210129023U | 2020-03-06 | |||
| CN202300765U | 2012-07-04 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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