Expansionsventil und Dampfkompressionssystem

Details

Veröffentlichungs-Nr.

EP3156746

Aktenzeichen

EP15189681

Anmeldetag

14. Oktober 2015

Veröffentlichung

30. Dezember 2020

Erteilung

30. Dezember 2020

Rechtsraum

EP

IPC

F25B41/06

Abstract

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).

Anmelder

Firma

Danfoss A/S

Land

🇩🇰 Dänemark

Fachgebiete