SPRINKLER CONTROL DEVICE

PROBLEM TO BE SOLVED: To automatically stop the discharge of water after a fire is extinguished, and to prevent such a maloperation that the discharge of water is carried out at a temperature lower than a prescribed temperature. SOLUTION: A main valve 9 and a pilot valve 20 are provided, and the main valve 9 is connected to a water supply source arranged upstream, and is connected to a sprinkler head 33 arranged downstream. At the normal time, the pilot valve 20 and the main valve 9 are closed. When a fire is caused and the temperature reaches a second temperature or more, the pilot valve 20 is opened, and then the main valve 9 is also opened. Further, the temperature reaches a first temperature or higher than the second temperature, a sealing means 40 opens the discharge passage 36 for discharging water through discharge openings 37, 38. Thereby, when the fire is extinguished and the temperature is lowered, the pilot valve 20 and then the main valve 9 are closed to stop the discharge of water. Since the starting temperature of water discharge is determined on the side of the sprinkler head 33, even if the pilot valve 20 is opened by maloperation at a temperature lower than the second temperature, the discharge of water is not carried out.