公开(公告)号：EP3156746A1

公开(公告)日：2017-04-19

申请号：EP15189681.8

申请日：2015-10-14

申请人： Danfoss A/S

发明人： VAN BEEK, Johan ,  URIBE, Sergio

IPC分类号： F25B41/06

CPC分类号： F25B41/062 ,  F25B2341/0651 ,  Y02B30/72

摘要： An expansion valve (2) for a vapour compression system (1) and a vapour compression system (1) are disclosed. The expansion valve (1) comprises a valve element (9), a valve seat (13) as well as a biasing member (12). The valve element (9) and the valve seat (13) are arranged in a first fluid passage (6) of the expansion valve (2). The expansion valve (2) further comprises a shape memory alloy actuator (17) that exerts a force on the valve element towards an open valve position when the shape memory alloy actuator is heated by an electric current. The object of the invention is to provide an expansion valve for a vapour compression system of the above type that maybe controlled externally but is also self-regulating. To this end the shape memory alloy actuator (17) is arranged in a second fluid passage (7) of the expansion valve (2), wherein the shape memory alloy actuator (17) is arranged to be in thermal contact with the fluid in the second fluid passage (7), such that the shape memory alloy actuator also actuates the valve element (9) towards a closed valve position when the shape memory actuator (17) is cooled by the fluid in the second fluid passage (7).

摘要翻译： 公开了一种用于蒸气压缩系统（1）和蒸汽压缩系统（1）的膨胀阀（2）。 膨胀阀（1）包括阀元件（9），阀座（13）以及偏压元件（12）。 阀元件（9）和阀座（13）布置在膨胀阀（2）的第一流体通道（6）中。 膨胀阀（2）还包括形状记忆合金致动器（17），当形状记忆合金致动器被电流加热时，​​该形状记忆合金致动器（17）在阀元件上朝向打开的阀位置施加力。 本发明的目的是提供一种用于上述类型的蒸汽压缩系统的膨胀阀，其可以从外部控制，但也是自调节的。 为此，形状记忆合金致动器（17）布置在膨胀阀（2）的第二流体通道（7）中，其中形状记忆合金致动器（17）布置成与 第二流体通道（7），使得当形状记忆致动器（17）被第二流体通道（7）中的流体冷却时，形状记忆合金致动器还致动阀元件（9）朝向关闭的阀位置。