Thermostatic device having two regulating conditions and two thermostatic elements

Thermostatic device having two regulating conditions, comprising a moveable fluid-metering component which includes two valves (9, 10) and is designed to move in a chamber (3) having a first, fluid inlet, port, a second, fluid outlet, port and at least one third port, at least two of these three ports being surrounded by respective seats (14, 15) in the case of the two valves so that when any one of the valves leaves its seat and moves away therefrom, the other one moves towards its own seat possibly as far as closure, the moveable metering component being carried by one part of a thermostatic fluid-metering element (7) which can move with respect to another part of the thermostatic element, which part is arranged at least partially outside the chamber, the said device being characterized in that it comprises a casing part in the form of a pipe (1), one end of which enters the chamber (3) via a valve seat (14) surrounding one of the ports (6) of the chamber, this pipe contains a thermostatic threshold-setting element (17) having a moveable part carrying a moveable threshold-setting component provided with a moveable stop (16) in the case of that part of the thermostatic metering element (7) which is outside the chamber (3), and the thermostatic threshold-setting element (17) has electrical heating means suitable for being electrically connected to an electrical power supply that can be selectively activated and deactivated so that, when the setting element (17) is not heated, the distance between the moveable stop (16) and the port seat (14) on the side facing the pipe (1), and thus the temperature for which this seat is released by its valve (9), are less than when it is heated.