Patent ID: 7243501

Claim:
A supercritical refrigerant fluid (FR), expansion device, for an air conditioning system comprising: a body ( 120 ) comprising an inlet chamber ( 1210 ) in which the refrigerant fluid enters and an outlet chamber ( 1230 ) through which the refrigerant fluid departs; and a set of expansion means to allow the refrigerant fluid to pass from the inlet chamber ( 1210 ) into the outlet chamber ( 1230 ); wherein the expansion means comprises: a variable expansion means ( 1212 ) comprising a first orifice ( 34 ) leading directly from the inlet chamber ( 1270 ) into the outlet chamber ( 1230 ), and an adjusting screw ( 134 ) suitable for adjusting the flow section of the first orifice ( 34 ); and, a fixed expansion means comprising a second orifice ( 35 ) leading directly from the inlet chamber ( 1270 ) into the outlet chamber ( 1230 ), with a fixed flow section.