To make it possible to operate a fire extinguishing system in spite of the presence of a fault in power source equipment or trouble in the water feed pumps themselves and to reduce a system cost.
A water storage heat tank 1 for air conditioning is used as a water source of this fire extinguishing system for emergency which feeds the water from the water source via water feed pipes to sprinklers and hydrants in the event of the outbreak of a fire. This water storage heat tank 1 for air conditioning is connected via the water feed pumps 10, 11 to the water feed pipes 6, 7. The system has a water feed route bypassing the water feed pumps. A compressed gas is fed into the water storage heat tank 1 for air conditioning from a compressed gas cylinder 4 via a valve 5 and is pressurized in the event of an operation failure of the water feed pumps 10, 11, by which the water feed pump 10 is bypassed and the water is fed from the water storage heat tank 1 for air conditioning to the water feed pipe 6. The automatic supply of the compressed gas in the event of a power failure is made possible by using the valve which is held close when the power source is supplied to the valve 5 and opens when the power service is interrupted.
KOBAYASHI MASAHIRO
MORINO HITOO
UCHIDA YASUO
IWASAKI AKIRA
