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US 8,944,099 B2Granted
Valve arrangement and method for operating a valve
AssigneeDanfoss A/S
InventorsPeter Gammeljord Nielsen, Lars Munch, Niels Gregersen, Bjarne Frederiksen
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AssigneeDanfoss A/S
InventorsPeter Gammeljord Nielsen, Lars Munch, Niels Gregersen, Bjarne Frederiksen
Estimating the term…
A valve arrangement is provided, (1) comprising: a valve (2) for controlling a flow of heating or cooling fluid through a heat exchanger, an actuator (12) for actuating said valve (2), control means (15) for controlling said actuator (12), a first temperature sensor (18) connected to said control means (15), a thermal resistance between the first temperature sensor (18) and the valve (2) being greater than a thermal resistance between the second temperature sensor (19) and the valve (2). It is intended to improve control of the valve. To this end the first temperature sensor (18) and the second temperature sensor (19) are part of detector means detecting a closing condition of the valve (2).
A valve arrangement comprising:
A method for operating a valve, said valve controlling a flow of heating or cooling fluid through a heat exchanger and being activated by an actuator wherein a first temperature is detected in a pre-determined first position relative to the valve and a second temperature is detected at a predetermined second position relative to the valve, a thermal resistance between the second position and the valve being smaller than a thermal resistance between the first position and the valve, wherein the first temperature and the second temperature are compared with each other and a closing condition of the valve is detected based on the comparison of the first temperature and the second temperature.
Dependencies are inferred from the claim text.