Reivindicaciones
1. A system for protection against fire in mobile units, each railway mobile unit is constituted by, at least, one car, each mobile unit comprising, at least, one area of risk to be protected, characterised in that said system comprises a remote position connected with each mobile unit through a radio set, and for each mobile unit a detection unit, a control unit, an execution unit and an extinction unit said units being incorporated on board the mobile unit, and the system being permanently activated provided the mobile unit is under power. 2. System according to claim 1, characterised in that the area of risk is constituted by, at least, a driver's cab and a passenger carriage. 3. System according to claim 1, characterised in that the detection unit comprises a suction unit, and an analysis unit. 4. System according to claim 3, characterised in that the detection unit is essentially electrical-electronic in nature. 5. System according to claim 3, characterised in that the suction unit comprises an assembly of suction mouthpieces, located in each area of risk, and ducting means. 6. System according to claim 3, characterised in that the analysis unit comprises at least one detection module, and a communications module. 7. System according to claim 6, characterised in that the detection module works by laser technology. 8. System according to claim 1, characterized in that the control unit comprises an evaluation unit a communications unit. 9. System according to claim 8, characterised in that the control unit is of an essentially electronic nature. 10. System according to claim 1, characterised in that the execution unit comprises at least one manual actuator. 11. System according to claim 10, characterised in that said actuator is a resettable push-button type press-press. 12. System according to claim 1, characterised in that the execution unit comprises a switch when the mobile unit comprises at least five coaches. 13. System according to claim 1, characterised in that the extinction unit comprises a pumping set, located on the underframe, a pipe system, a set of electro-valves, and a spray nozzle assembly. 14. System according to claim 13, characterised in that the extinction unit is of an essentially hydraulic nature. 15. System according to claim 13, characterised in that for each mobile unit there is a single pumping set. 16. System according to claim 16, characterised in that the pumping set comprises a storage unit of extinction fluid, and an assembly of elements to impel said extinction fluid. 17. System according to claim 13, characterised in that the pipe system is composed by a wet pipe network, located on the underframe of each coach that comprises the mobile unit, and a dry pipe network, located in the false ceiling of each coach that comprises the mobile unit. 18. System according to claims 16 and 17, characterised in that the wet pipe network is pressurized by means of a jockey pump. 19. System according to claim 13, characterised in that said set of electro-valves comprises a main valve, located in the pumping set and a selector valve for each area of risk. 20. System according to claim 17, characterised in that said electro-valves are solenoids. 21. System according to claims 17 and 19, characterised in that the wet pipe network connects the pumping set with each selector valve, and the dry pipe network connects each selector valve with the collection of spray nozzles. 22. System according to any one of the previous claims, characterised in that said system is operative both with the mobile unit in motion and when stationary. 23. Method for protection against fire in mobile units, characterised in that said method comprises a first detection stage, a second stage of information management, and a third extinction stage, activated in a manual way by means of operating an actuator. 24. Method according to claim 23, characterised in that the detection stage comprises suction of air through the suction mouthpieces in the areas of risk, conduction of this air through the ducting means to the detection module of the analysis unit, analysis of said air by the detection module, and generation of a first set of signals for the detection module, this detection stage being carried out by the detection unit. 25. Method according to claim 23, characterised in that the control stage comprises evaluation of the first set of signals generated by the detection module establishing pre-alarm and alarm levels, transmission of a second set of pre-alarm signals and a third set of alarm signals, information to the execution unit, remote position and driver's cab, administration of the extinction stage, maintenance check of the system, and generation of historical records. 26. Method according to claim 23, characterised in that the extinction stage comprises the application of extinction fluid. 27. Method according to claims 23 and 25, characterised in that if the extinction stage is carried out by normal procedure, it is necessary that the transmission takes place of said third set of alarm signals and said actuator is a first push-button located in the driver's cab. 28. Method according to claim 23, characterised in that if the extinction stage is carried out by emergency procedure said actuator is a second emergency push-button located in the driver's cab. 29. Method according to claims 23 and 25, characterised in that if the extinction stage is carried out remotely through the radio set, it is necessary that the transmission takes place of said third set of alarm signals and said actuator is a first push-button located in the remote position.
