Patent ID: 11927280
Assignee: FUJIKIN INCORPORATED
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F  G

Claim 8:
9. A monitoring method of a diaphragm valve, the diaphragm valve comprising: a valve body defining a flow path through which a fluid flows, and an opening which opens to the outside in a middle of the flow path; a flexible partition member covering the opening, separating the flow path from the outside, and changing a cross-sectional area of the flow path; a flexible support member disposed on a rear surface side opposite to a flow path side of the flexible partition member; and a housing fixed to the valve body via peripheral portions of the flexible partition member and the flexible support member, the monitoring method comprising:
detecting a humidity or change thereof of an atmosphere in a space defined by an inner surface of the flexible support member and the housing by a humidity sensor that has a flat plate shape having a hole in a center and is disposed on a ceiling of said space, or by a humidity sensor that is disposed on a surface of a compressor between the flexible support member and the compressor; and
determining abnormality based on the detection result.