JPWO2021013836A5 - - Google Patents

Claims (7)

In a fluid valve (10; 20; 30; 40) comprising a first zone (I) and a second zone (II) separated by an opening sealed by a deformable element (14; 24; 34; 44),
said first zone (I) is provided with a shape memory alloy wire (15; 25; 35; 45) fixed to a fixing surface (17; 27; 37; 47), said shape memory alloy wire (15; 25; 35; 45) acting on a first surface of said deformable element (14; 24; 34; 44) directly or via a piston (36';35; 45),
Said second zone (II) comprises at least two ports (11, 12; 21, 22; 31, 32; 41, 42, 42') and a plunger (16, 26, 36, 46) connected to a second surface of the deformable element (14; 24; 34; 44) opposite said first surface, one of said ports (12; 22, 32; 42, 42'). said plunger (16, 26, 36, 46) configured to close;
characterized in that a bypass channel (13; 23; 33; 43) permanently connects said first zone (I) to said second zone (II) via a first end opening (131; 231; 331; 431) positioned in said first zone (I) and a second end opening (132; 232; 332; 432) positioned in said second zone (II). Fluid valves (10; 20; 30; 40). 2. Fluid valve (10; 20) according to claim 1, characterized in that the shape memory alloy wire (15; 25) is configured in a V-shape and is directly connected to the first surface of the deformable element (14; 24) at a central portion or end of the V-configuration. said shape memory alloy wires (35; 45) are arranged in a V-shaped configuration,
In said V-shaped configuration, a central portion of said shape memory alloy wire (35; 45) engages a first end of a piston (36';46') extending through said fixed surface (37; 47) substantially perpendicular to said first surface of said deformable element (34; 44), a second end of said piston (36';46') being connected to said deformable element (34; 44) and said piston ( 2. Fluid valve (30; 40) according to claim 1, characterized in that the first end of the fluid valve (36';46') is arranged opposite the fixed surface (37; 47) with respect to the deformable element (34; 44). Fluid valve (10; 20; 30; 40) according to any one of the preceding claims, characterized in that said deformable element is a bellows (44) or a membrane (14; 24; 34), preferably a corrugated membrane. 5. Fluid valve (10; 20; 30; 40) according to any one of the preceding claims, characterized in that the ratio of the cross-sectional area of the bypass channel (13; 23; 33; 43) to the cross-sectional area of the ports (11, 12; 21, 22; 31, 32; 41, 42, 42') is between 0, 1 and 1 . Use of a fluid valve according to any one of claims 1 to 5 for controlling a fluid flow, characterized in that said fluid flow is water, oil or a refrigerant liquid. 7. Use according to claim 6 , characterized in that the fluid valve is an evaporation valve or a condensation valve.