| 摘要 |
PURPOSE:To emit an alarm or extinguish fire at the time of oxygen deficiency by providing a thermal deformation element in contact with or in the vicinity of a combustion cylinder, providing an interlocking member actuating a switch being in contact with a solenoid or an alarm device so as to respond to the thermal deformation element, and also providing an engaging part engaging the interlocking member. CONSTITUTION:In the case of oxygen deficiency, the temperature at a position (in the vicinity of the outside of a combustion cylinder 4) where the temperature fluctuation appears more remarkably than the temperature at the time of normal combustion, displaces a thermal deformation element (such as a bimetal 5). By this displacement force, an interlocking member 8 is rotated. Then, the interlocking member 8 is disconnected from an engaging part. A switch 6 provided at the lower end of the interlocking member 8 operates by the force exerted by a spring 10. An alarm device 25 is lit or rings, or firs is extinguished by a solenoid 30. In this case, during the rise of the temperature, even when a one-way opened door 12 provided at the tip end of the bimetal 5 hits against the interlocking member 8, the door 12 is opened, and hence the door 4 can cross over the interlocking member without any difficulty. |
