Thermostatic device with two levels of regulation operated selectively
AssigneeVernet
InventorsLionel Jean Mabboux, Claude Henault, René Jean-Claude Mas
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Abstract
A thermostatic device comprises a chamber with ports, at least one of which can be closed off by a valve carried by a moving part of a metering thermostatic element. In order to obtain two reliable levels of regulation, and to maintain regulation unless the device is completely destroyed, a duct opening into the chamber via a seat for the valve contains at least one region of a thermostatic element for adjusting the regulation threshold containing selectively operated heating means and comprises a stop for the thermostatic element. The stop can itself move in the direction of movement of the moving part so as to move closer to the seat when the heating means are switched on.
Claims28
A thermostatic device comprising:
- a chamber having a first fluid inlet port, a second fluid outlet port, and a third port, said chamber having a valve seat around at least one of said first fluid inlet port, said second fluid outlet port, and said third port;
- a fluid-metering assembly including a valve and being operable to move within said chamber;
- a fluid-metering thermostatic element having a first part and a second part movable with respect to said first part, said second part being arranged so as to carry said fluid-metering assembly and being arranged at least partially outside of said chamber;
- a duct for allowing passage of cooling fluid therethrough, said duct having an end communicating with said chamber via said valve seat around said at least one of said first fluid inlet port, said second fluid outlet port, and said third port;
- and
- a regulating threshold-adjustment thermostatic element including a fixed part and a moving part, said moving part having a stop for limiting an amount of movement of said second part of said fluid-metering thermostatic element, an insertion region of said regulating threshold-adjustment thermostatic element comprising said moving part and at least a portion of said fixed part and containing a heating member, said regulating threshold-adjustment thermostatic element being arranged such that said insertion region containing said heating member is located within said duct;
- wherein said heating member is operable to be switched between heating states so as to switch said insertion region between a high temperature state, wherein said stop extends further outward from said fixed part so as to be located closer to said valve seat through which said end of said duct communicates with said chamber, and a low temperature state, wherein said stop is located farther from said valve seat through which said end of said duct communicates with said chamber than when said insertion region is in said high temperature state.
Dependencies are inferred from the claim text.