| 摘要 |
This document described an electrically controlled valve in particular for hot water heaters of the type comprising: a body (2, 3), provided with at least one inlet (4, 5) and an outlet (6), at least one passage way (V1, V2) located between said inlet (4, 5) and said outlet (6); a plug device (9) that can move between an open position and a closed position of said passage way (V1, V2); actuator devices (SMA1, SMA2) providing for the movement of said plug device (9) by way of an actuation mechanism (8, 10, 11, 12); where said actuator devices (SMA1, SMA2) comprise a first element with an elongated and/or narrow shape made of a shape memory alloy (SMA1). According to the invention, said actuator devices (SMA1, SMA2) comprise at least a second element with an elongated and/or narrow shape made of a shape memory alloy (SMA2), connected mechanically in series to said first element (SMA1). |
