System for managing flow-state of fluid

A system for managing a flow-state of fluid, comprising

• a flow detector that includes a body having a fluid space which is supplied with a fluid fed from a fluid feeding device from a supply aperture, by drive of the fluid feeding device, and discharges the fluid from a discharge aperture, houses in the fluid space of the body, a valve member that closes the supply aperture when the fluid is not supplied, and opens the supply aperture when the fluid is supplied, and detects a flow of the fluid by opening and closing of the valve member, and
• a management unit that detects opening and closing of the valve member of the flow detector and manages a flow state of the fluid in the fluid space of the body,
• wherein the system includes a temperature sensor that senses a temperature of the fluid,
• wherein the management unit comprises
• opening/closing detection means that detects opening and closing of the valve member of the flow detector,
• detection time specifying means that specifies a detection time of the opening/closing detection means,
• actual opening/closing time calculation means that calculates a time until the opening/closing detection means detects closing after the opening/closing detection means detects opening as an actual opening/closing time, when the opening/closing detection means detects the opening of the valve member of the flow detector and detects the closing of the valve member of the flow detector within a detection time specified by the detection time specifying means,
• correlation storage means that stores a correlation between the temperature of the fluid and a proper opening/closing time range which is proper of the valve member,
• proper time range derivation means that derives a proper opening/closing time range in a temperature sensed by the temperature sensor from the correlation storage means,
• opening/closing time determination means that determines whether the actual opening/closing time calculated by the actual opening/closing time calculation means is within or outside the proper opening/closing time range derived by the proper time range derivation means, and
• abnormal signal transmission means that transmits an abnormal signal when the opening/closing time determination means determines the actual opening/closing time as outside the proper opening/closing time range.